Main Article Content
Abstract
The concentration of nitrates in ground water is observed to be increasing in the world in general and Asian countries in particular. Ground water is still a man source of drinking water especially in rural areas of Asian countries. Nitrates are known to cause methaemoglobinemia in babies and intestinal cancer due to formation of nitrosamines in general population. Several treatment processes for the removal of nitrates from drinking water have been studied. These processes comprise; vegetative de-nitrification, reverse osmosis, electrodialysis, catalytic reduction, chemical reduction, ion exchange and biological denitrification. Combinations of two methods like combined ion exchange-biological denitrification have also been studied. Every method have merits and demerits, however, the methods based on ion exchange for the removal of nitrates from drinking water and regeneration of resin by biological denitriflcation appear to have edge over other methods. This communication presents a review on existing denitrification processes and spells out needs for future research.
Keywords
Article Details
Copyright (c) 2001 Environment Conservation Journal
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
References
- Adhikari S. K., Narayanan P. K., Thampy S. K., Dave N. J., Chauhan D. K. and lndu Sekhar V. K. 1991 Desaliantion of Brackish Water of Higher salinity by Electordialysis. Desaliantion and Water Reuse 4, 189-200. DOI: https://doi.org/10.1016/0011-9164(91)85129-I
- Akunna J. C., Bizeau C. and Maletta 1993. Nitrate and nitrite reductions with anaerobic aludge using various carbon sources: Glucose, Glycerol, acetic acid, Lactic acid and Methanol. Wat Res. 27, 1303-1312. DOI: https://doi.org/10.1016/0043-1354(93)90217-6
- Arthur W. Hounslow. 1995. Water Quality Data, Analysis and Interpretation. CRC Lewis Publishers.
- Bandpi A. M. and Elliott D. J. 1996. Nitrate removal from groundwater using an anoxic aerobic rotating biological contactor. Water Scl TechnoL 34, 323-330. DOI: https://doi.org/10.2166/wst.1996.0387
- Bandpi A. M. and Elliott D. J. 1998. Groundwater denitrification with alternative carbon sources. Water sci. Technol. 38, 237-243. DOI: https://doi.org/10.2166/wst.1998.0257
- Barlog F. 1980. Nitrate in trinkwasserursachen and problemlosungen. Chem. Rdsch. 33,3-16.
- Barrenstein A., Kramer U. and Obermann P. 1986. Underground treatment of nitrate rich ground water by infiltration with treated wastewater, or methane rich natural gas.DVGW- Schriftenreihe, Wasser, Frankfort, West Germany, 106, 99-116.
- Batrchelor B., and Lawrence A. W. 1978. A kinetic model for autotrophic denitrification using elemental sulfur. Wat. Res. 12(12), 1075-1084. DOI: https://doi.org/10.1016/0043-1354(78)90053-2
- Cheng I. F., Muftikian, Fernando Q. and Korte N. 1997. Reduction of nitrate to ammonia by zero valent iron. Chemosphere. 35 (11), 2689-2695. DOI: https://doi.org/10.1016/S0045-6535(97)00275-0
- Chew Chin, F. and Zhang , T.C., 1998. In Situ Remediation of Nitrate Contaminated Ground Water by Electrokinetics/ Iron Wall Process. Wat Sci Tedi. 38, 135-142. DOI: https://doi.org/10.2166/wst.1998.0286
- Christensson M., Lie E. and Welander T. 1994. A comparison between ethanol and methanol as carbon sources for denitrification. Wat. Sci. Technol. 30, 83-90. DOI: https://doi.org/10.2166/wst.1994.0255
- Claus G. and Kutzner H. J. 1985. Autotrophic denitrification Thiobacillus denitrificans. Appl. Microbiology and Biotechnology. 22, 289-296. DOI: https://doi.org/10.1007/BF00252031
- Clifford D and Liu Y. 1993. Ion exchange for nitrate removal.JAWWA. 85(4) 135-143. DOI: https://doi.org/10.1002/j.1551-8833.1993.tb05971.x
- Dahab M. F., Guler G. A. and Rogalla F. 1991 Experience with nitrate treatment in the United States and Europe. Proceedings Annual Conference American Water Works Association, Philadelphia, PA. June 23-27.
- Dahab M. F. and Kalagiri J. 1996. Nitrate removal from water using cyclically operated fixed film bio denitrification reactors. Wal Scl Technol. 34, 331-338. · DOI: https://doi.org/10.2166/wst.1996.0388
- Dahab M. F. and Woodbury B. L. 1998. Biological treatment Options for nitrate removal from drinking water, AWWA Inorganic Contaminants Workshop. San Antonio, TX, February 22-24
- De. Roo H. C. 1980. Nitrate fluctuation in groundwater as influenced by use of fertilizer ConnecticutAgr. Exp. Station, University of Connecticut, New Haven. CT Bull. 779.
- Deguin A. 1982. Elimination des nitrates par echange d'ions dans les eaux potables;Mise en equations du procede. Trib Cebedeau. 35, 35-51.
- Delanghe B., Nakamura F., Myoga H., Magara Y. and Guibal E. 1994. Drinking water denitrification in a membranebioreactor. Water Sci.Technol.30, 157-160. DOI: https://doi.org/10.2166/wst.1994.0263
- Engler R. M. and Patrick W. H.Jr. 1974. Nitrate, removal from floodwater overlying flooded soils and sediments. J. Environ. Qual. 4,409. DOI: https://doi.org/10.2134/jeq1974.00472425000300040025x
- Fennessy M. S. and Cronk J. K. 1997. The effectiveness and restoration potential of riparian ecotones for the management of non-point source pollution, particularly nitrate. Critical Reviews in Environmental Sci & Technol. 27 (4), 285-317. DOI: https://doi.org/10.1080/10643389709388502
- Flere J. M . and Zhang T. C. 1999. Nitrate removal with sulfur- limestone autotrophicdenitrification processes. J. of Env. Engineerign. 125,721-729. DOI: https://doi.org/10.1061/(ASCE)0733-9372(1999)125:8(721)
- Flis J. 1991. Stress corrosion cracking of structural steels in nitrate solutions. In: J. Flis (ed.) Corrosion of Metals and Hydrogen- Related Phenomena. 57-94. Materials Science Monographs, 59, Elsever Amsterdam, NL.
- Fonseca A. D., Crespa J. et al. 2000. Drinking water denitrification using a nova! ion exchange membrane Bioreactor. En. Sci. Technol. 34, 1557-1562. DOI: https://doi.org/10.1021/es9910762
- Frick B. R. and Richard Y. 1985. Experience with biological denitrification in a full Scale drinking water treatment plant. Vom Wasser. 64, 145-154.
- Fried J. J. 1991. Nitrates and their control in EEC aquatic environment. In: I. Bogardi and R.D. Kuzelca, (eds.) Nitrate Contamination: Exposure, Consequence and Control. Springer- Verlag, Berlin, Germany, 3-II. Fritsche U. 1993. Removal of nitrate and other anions from water by yellow Bismuth Hydroxide.J. Environ. Sci. Health. A 28 (9), 1903-1913. DOI: https://doi.org/10.1007/978-3-642-76040-2_1
- Gauntlett R. B. 1975. Nitrate removal from water by ion exchange. Water Treatment and Examination, 24, 172-193.
- Gayle B. P., Boardman G. D., Sherreard J. H. and Benoit R.E. I 989. Biological denitrification of water. J. Envir. Engrg. ASCE, 115(5), 930-943. DOI: https://doi.org/10.1061/(ASCE)0733-9372(1989)115:5(930)
- Ginocchio J. 1984. Nitrate levels in drinking water are becoming too high. Water Services, Switzerland. 88, 143-147.
- Gopal R., Bhargava T. N. and Bhatti O.P. 1977. Nitrates in well waters ofRajasthan. Curr. Agric. 1 (3), 57.
- Gros H. and Treutler K. 1986. Biological denitrification process with hydrogen oxidizing bacteria for drinking water treatment. Aqua, London, England, 5,288-290.
- Gros H., Schnoor G. and Ruttan P. 1986. Nitrate removal from groundwater by autotrophic microorganisms. Water Supply. 4, 11-21.
- Gros H. and Ginocchio J. 1982. Biological nitrification and denitrification on submerged mixing elements. Gas Wasser Abwasser, Zurich, Switzerland, 67, 312-321.
- Gupta S. C. 198 I. Evaluation of quality of well waters in Udaipur District. Indian Jour. Environ. Hlth. 23(3), 195-202.
- Guter G. A. 1982. Removal ofNitratefrom Contaminated Water Supplies for Public Use. Report EPA- 600/S2- 82-042, U.S. Environmental Protection Agency (EPA), Cincinnati, Ohio.
- Guter G. A. 198 1. Removal of Nitrate from Contaminated Water Supplies for Public Use. EPA-600/$2-81/029, April, 1981 Environmental Protection Agency Cincinnati, Ohio.
- Hammer M. J. 1991. Water and Wastewater Technology. 2nd edition.
- Hamzah Ziad Abu Gharah. I996. Biological denitrification of high nitrate water: Influence of type of carbon source and nitrate loading. J. En. Sci. & lllth. A31 (7), 1651-1668. DOI: https://doi.org/10.1080/10934529609376448
- Handa B. K., Goel D. K., Kumar A. and Sondhi T. N. 1982. Pollution of Ground Waters by Nitrates in Uttar Pradesh. IAWPC Tech. Annual. IX, 95-103.
- Hill M. J., Hawksworth G. and Tatttersall G. 1973. Bacteria, Nitrosamines and cancer of stomach. Br. J. Cancer. 28, 562-567. DOI: https://doi.org/10.1038/bjc.1973.186
- Hiscock K. M., Llyod J. W and lemer D. N. 1991. Review of natural and artificial denitrification of groundwater. Wat. Res. 25 (9), 1099- 1111. DOI: https://doi.org/10.1016/0043-1354(91)90203-3
- Hoek J.P. Van der and Klapwijk A. 1987. Nitrate removal from groundwater. Wat. Res. 21 (8), 989-997. DOI: https://doi.org/10.1016/S0043-1354(87)80018-0
- Hoek J. P. van der and Klapwijk A. 1985. Biological/ physical chemical methods for nitrate removal from groundwater. PT Procestec/miek. 40, 22-25.
- Hoek J. P., rnn der and Klapwijk A. 1986. Feasibility study to biological/physical chemical nitrate removal from ground water. H,0 19, 53-58.
- Hoek J.P. and van der 1985. Biological/physical chemical nitrate removal from groundwater- an environmental and financial attractive alternative. Proceedings of the congress "Nitrates in Water". SITE 85, 22-24. October.
- Hoek J. P., van der. Kappelhof J. W. N. M. and Hijnen W. A. M. 1992. Biological nitrate removal from ground water by sulphur/ime stone denitrificaton. J Chemical Technol. and Biotechnol. 54 (2), 197-200.
- Hoek J. P.. van der, Hoek W. F., van der and Klapwijk A. 1998. Nitrate removal from ground water - Use of nitrate selective resin and low concentrated regenerate. Water, Air and Soil Pollution 37, 41-43. DOI: https://doi.org/10.1007/BF00226478
- Hoell W. and Feuerstein W. 1985. Combined Hardness and Nitrate/ sulphate removal from ground water by the carix ion exchange process. Water Supply. 3, 199-209.
- Horold S., Tacke C. and Vorlop K. D. 1993. Catalytical removal of nitrate and nitrite from drinking water- I: screening for hydrogenation catalysis and influence of reaction conditions on activity and selectivity. Environmental Technology 14, 931-939. DOI: https://doi.org/10.1080/09593339309385367
- Hounslow A. W. 1995. Water Quality Data, Analysis and Interpretation. CRC Lewis Publishers.
- House of Lords 1989. Nitrate in Water. 16th Report, Session 1988-1989 of the Select Committee on the European Communities. HMSO, London.
- Indushekhar V. K. Trivedi G. S. and Shah B.G, 1991. Removal of nitrate by electrodialysis desalination and water Re-use. volume 4, Proc. of Twelfth International Symposium. Institute of Chemical Engineers Rugby U.K., 15-18 April 1991.
- Kinoshita K. 1988. Carbon- Electrochemical and Physicochemical Properties. John, Wiley and Sons, New York.
- Knowles R. 1982. Denitrification. Microbiological Rev. 46(1), 43 -70. DOI: https://doi.org/10.1128/mr.46.1.43-70.1982
- Kurt M., Dunn I. J. and Bourne J. R. l987. Biological denitrification of drinking water using autotrophic organisms with hydrogen in fluidized bed bio film reactor.Biotechnology Bioengineering. 29,493-501. DOI: https://doi.org/10.1002/bit.260290414
- La Motta, Diaz E. and Andrade Salgado A. 1985. Autotrophic denitrification using sulphides. Plitechnica, Quito, Ecuador. 10, 65-76.
- Lewandowski 1., Bakke R. and Characklis W. G. 1987. Nitrification and autotrophic denitrification in calcium alginate beads. Water Sci. Technol. 19, 175 -182. DOI: https://doi.org/10.2166/wst.1987.0199
- Liang S., Mann M.A., Guter G. A., Kim P. H. S. and Hardean D. L. 1999.J4WA. 91 (2), 79-90. DOI: https://doi.org/10.1002/j.1551-8833.1999.tb08587.x
- Liessens J., Gennonpre R., Beernaert S. and Verstraete W. 1993. Removing nitrate with a methyotrophic fluidized bed: Technology and Operating Performance..J.AWWA. 85, 144-154. DOI: https://doi.org/10.1002/j.1551-8833.1993.tb05972.x
- Lin S. H. and Wu C. L. 1997. Nitrate removal from aqueous solution by ion exchange. Environ. Sci. Health. A32 (5), 1575-1589. DOI: https://doi.org/10.1080/10934529709376627
- Lunkad S. K. 1994. Rising nitrate levels in groundwater and increasing N-fertilizer consumption.Bhu-Jal News, 4-10.
- Majumdar D. and Gupta N. 2002. Nitrate pollution to groundwater and associated human health disorders. Indian J. Environ. Hlth. 42, 28-39.
- Marquardt 0. K. 1987. Reverse osmosis for removing nitrate from water.Aqua, 1, 39-44. Martin G. 1982. Biological Denitrification of Water. Patent application 79/10154 France. Mason B. and Moore C. B. 1985. Principles of Geochemistry. Wiley Easstern Ltd. 350.
- Miquel A. F. and Oldani M. A. 1991 Newly developed process for nitrate removal from drinking water. In: I. Bogardi and R. F. Kuzelka. (eds.) Nitrate Contamination: Expouse, Consequence and Control. Springer Verlag, Berlin, Gennany. pp 385-394. DOI: https://doi.org/10.1007/978-3-642-76040-2_28
- Murphy P. 199I. Chemical removal of nitrate from Water.Nature. 350, 223-225. DOI: https://doi.org/10.1038/350223a0
- Nixon N. 1992. English water utility tackles nitat4 removal. Water Engrg. Mgmt. 139, 27-28.
- Ottley C. J., Davison W. and Edmonds W. M. 1997. Chemical catalysis of nitrate reduces by iron (ii) Geochimical et. Cosmochimica Acta. 61, 1819-1828. DOI: https://doi.org/10.1016/S0016-7037(97)00058-6
- Pandey S. P., Narayanswamy V. S. and Hasan M. Z. 1979. Quality of well waters ofNagpur with special regard to Nitrates and Nitrites. Indian Jour. Environ. Hlth.21, 35-46.
- Pepin-Lahellur J. 1930. Reduction of metallic nitrates and nitrated organic compounds in Acid medium..Ann. Acad Brasil Sci. 2,31-2
- Routenbach R. and Kopp W. 1986. Separation of nitrate from well water by membrane process (reverse osmosis/eleetrodialysis reversal). Aqua, 5, 279-282.
- Reddy K. R., Patrick W .H. and Phillips R. 1978. The role of nitrate diffusion in determining the order and rate of denitrification in flooded soil. I-Experimented results. Soil Sci. Soc. Am. J. 42, 268. DOI: https://doi.org/10.2136/sssaj1978.03615995004200020012x
- Reevs T. G. 1972 Nitrogen removal - a literature review.JWPCF. 44(10)1895-1908.
- Richard Y. and Leprince A. 1982. Pollution per les nitrates: traitments disponibles. Trib Cebedeau. 35, 21-33.
- Richard Y. et al. 1980. Denitrification of water for human consumption. Progress in Water Tech. Oxford, England, 12, 173-191. DOI: https://doi.org/10.1016/B978-1-4832-8438-5.50017-0
- Sakakibara Y., Araki K., Kuroda M, Tanaka T and Watanabe T. 1994. Denitrification and neutralization with an electrochemical and biological reactor. Water Sci Technol. 30, 151-155. DOI: https://doi.org/10.2166/wst.1994.0262
- Schepers J. S., Frank K. D. and watts D.G. 1984. Influence of irrigation and nitrogen fertilization on groundwater quality. Proceeding Int. Union of Geodesy and Geophysics, Hamburg, West Germay. 21-32.
- Schippers L. A., Copper A. B., Harfoot C. G. and Dyck W. J. I 993. Regulators of denitrification in an organic riparian soil. Soil Biol. Biochem. 25, 925. DOI: https://doi.org/10.1016/0038-0717(93)90095-S
- Schippers J. C., Kriuth J. C., Mulder F.G. and van Lieshout J. W. 1987. Removal of nitrate by slow sulfur (limestone filtration). 4qua, 5, 274-280.
- Segall D. A. and Bruell C. J. 1992. Electroosmotic contaminant - Removal process.J. ofEnv. Engr. I 18, I. DOI: https://doi.org/10.1061/(ASCE)0733-9372(1992)118:1(84)
- Sell M. B., Feist H. R., Behling R. D., Kneifel K. and Peinemann K. V. 1993. Proceedings of the MembraneTechnology Conference. American Water Works Association, Baltimore, MD. pp I-4.
- Siantar D. P., Schreir C. G., Chou C. S. and Reinhard M. 1996. Treatment of 1, 2 dibromo-3-chloropropane and nitrate- contaminated water with zero valent Iron or hydrogen / palladium catalysts. Wat Res. 30, 2315-2322. DOI: https://doi.org/10.1016/0043-1354(96)00120-0
- Soares M. I. M., Belkin S. and Abeliovich A. 1988. Biological groundwater denitrification: laboratory studies. Waater Sci. Technol. 20(3), 189-195. DOI: https://doi.org/10.2166/wst.1988.0098
- Soares M. I. M., Braester C., Belkin S. and Abeliovich A. 1991. Denitrification in laboratory sand columns: carbon regime, gas accumulation and hydraulic properties. Wat. Res. 25, 325-332. DOI: https://doi.org/10.1016/0043-1354(91)90013-G
- Sontheimer H., Cornel P., Fettig J. and Rolunann U., 1982. Grundwasserveru.rreinigung- Bedrohung fur die offentliche Wasserversorgung 2. GWF- Wass. Abwass. 123,521-530.
- Sorg T. J. 1979. Nitrate removal from drinking water. EPA Seminar on Nitrates in Ground Water. Kansas City, Mo, 3-4 October.
- Sova R. J. 1986. The Chemical Removal of Nitrate from Water Supplies Using Ferrous Sulfates and Pickle Liquor. MS Thesis, Univ of Nebraska at Lincoln, Lincoln, Nebr.
- Spalding R. F. and Exner M. E. 199 I. Nitrate contamination in the contiguous United States. In: Bogardi and R.D. Kuzelca (eds.) Nitrate Contamination: Exposure, Consequences and Control. Springer - Verlag, Gennany. pp 13-49. DOI: https://doi.org/10.1007/978-3-642-76040-2_2
- Spalding R. F. and Exner M. E. 1993. Occurrence of nitrate in groundwater- a review.J.Envir. Quality, 22, 392-402. DOI: https://doi.org/10.2134/jeq1993.00472425002200030002x
- Stumn W. and Morgan J. 1996. Aquatic Chemistry. Chemical Equilibrium and Rates in Natural Waters. Wiley 3rd edn. New York, p. 1022.
- Szabo A. G. and Bartha L. G. 1 9 5 1. Silver catalysts in the reduction of nitrates by Ferrous Hydroxide. Acta Chem Hung. 1, 116.
- Todd R. L., Lowrance R. R., Hendrickson 0., Asmussen, L. E. Leonard R., Fail, J. and Herrick B. 1983. Riparian vegetation as filters of nutrients exported from a coastal plain agricultural watershed In: R. R. Lowrance, R. L. Todd, L. E. Asmussen and R. A. Leomard (eds.) Nutrient Cycling in Agricultural Ecosystems. The University of Georgia College of Agriculture Experiment Station Special Publication.23, 485.
- Tree Buffer protects Groundwater at contaminated site. 1994. Water en. Technol. 6, 15-16.
- White D. A., Labayru R., Obermoller H. R., and Deryde X. 1991. The application of inorganic membranes to electrodialysis process. Desalination and Water Reuse. 4, 177-188. DOI: https://doi.org/10.1016/0011-9164(91)85128-H
- Wilson W. S., Ball A. S. and Hinton R. H. 1999. Managing Risks of Nitrates to Human and the Environment. The Royal Society of Chemistry. DOI: https://doi.org/10.1533/9781845693206
- Young G. K., Bungay H. R, Brown L. N. and Parsons W.A. 1964. Chemical reduction of nitrate in water. JWPCF 36, 395-398.
- Young K. 1975. Geology: The Paradox ofEarth and Man. Houghton Miffin, Boston.
- Zawaideh L. L. and Zhang T. C. 1998. The effects of pH and addition of an organic buffer (HEPES) on nitrate transformation in Fe" water systems. Wat. Sci. Tech. 38 107-115. DOI: https://doi.org/10.2166/wst.1998.0283
References
Adhikari S. K., Narayanan P. K., Thampy S. K., Dave N. J., Chauhan D. K. and lndu Sekhar V. K. 1991 Desaliantion of Brackish Water of Higher salinity by Electordialysis. Desaliantion and Water Reuse 4, 189-200. DOI: https://doi.org/10.1016/0011-9164(91)85129-I
Akunna J. C., Bizeau C. and Maletta 1993. Nitrate and nitrite reductions with anaerobic aludge using various carbon sources: Glucose, Glycerol, acetic acid, Lactic acid and Methanol. Wat Res. 27, 1303-1312. DOI: https://doi.org/10.1016/0043-1354(93)90217-6
Arthur W. Hounslow. 1995. Water Quality Data, Analysis and Interpretation. CRC Lewis Publishers.
Bandpi A. M. and Elliott D. J. 1996. Nitrate removal from groundwater using an anoxic aerobic rotating biological contactor. Water Scl TechnoL 34, 323-330. DOI: https://doi.org/10.2166/wst.1996.0387
Bandpi A. M. and Elliott D. J. 1998. Groundwater denitrification with alternative carbon sources. Water sci. Technol. 38, 237-243. DOI: https://doi.org/10.2166/wst.1998.0257
Barlog F. 1980. Nitrate in trinkwasserursachen and problemlosungen. Chem. Rdsch. 33,3-16.
Barrenstein A., Kramer U. and Obermann P. 1986. Underground treatment of nitrate rich ground water by infiltration with treated wastewater, or methane rich natural gas.DVGW- Schriftenreihe, Wasser, Frankfort, West Germany, 106, 99-116.
Batrchelor B., and Lawrence A. W. 1978. A kinetic model for autotrophic denitrification using elemental sulfur. Wat. Res. 12(12), 1075-1084. DOI: https://doi.org/10.1016/0043-1354(78)90053-2
Cheng I. F., Muftikian, Fernando Q. and Korte N. 1997. Reduction of nitrate to ammonia by zero valent iron. Chemosphere. 35 (11), 2689-2695. DOI: https://doi.org/10.1016/S0045-6535(97)00275-0
Chew Chin, F. and Zhang , T.C., 1998. In Situ Remediation of Nitrate Contaminated Ground Water by Electrokinetics/ Iron Wall Process. Wat Sci Tedi. 38, 135-142. DOI: https://doi.org/10.2166/wst.1998.0286
Christensson M., Lie E. and Welander T. 1994. A comparison between ethanol and methanol as carbon sources for denitrification. Wat. Sci. Technol. 30, 83-90. DOI: https://doi.org/10.2166/wst.1994.0255
Claus G. and Kutzner H. J. 1985. Autotrophic denitrification Thiobacillus denitrificans. Appl. Microbiology and Biotechnology. 22, 289-296. DOI: https://doi.org/10.1007/BF00252031
Clifford D and Liu Y. 1993. Ion exchange for nitrate removal.JAWWA. 85(4) 135-143. DOI: https://doi.org/10.1002/j.1551-8833.1993.tb05971.x
Dahab M. F., Guler G. A. and Rogalla F. 1991 Experience with nitrate treatment in the United States and Europe. Proceedings Annual Conference American Water Works Association, Philadelphia, PA. June 23-27.
Dahab M. F. and Kalagiri J. 1996. Nitrate removal from water using cyclically operated fixed film bio denitrification reactors. Wal Scl Technol. 34, 331-338. · DOI: https://doi.org/10.2166/wst.1996.0388
Dahab M. F. and Woodbury B. L. 1998. Biological treatment Options for nitrate removal from drinking water, AWWA Inorganic Contaminants Workshop. San Antonio, TX, February 22-24
De. Roo H. C. 1980. Nitrate fluctuation in groundwater as influenced by use of fertilizer ConnecticutAgr. Exp. Station, University of Connecticut, New Haven. CT Bull. 779.
Deguin A. 1982. Elimination des nitrates par echange d'ions dans les eaux potables;Mise en equations du procede. Trib Cebedeau. 35, 35-51.
Delanghe B., Nakamura F., Myoga H., Magara Y. and Guibal E. 1994. Drinking water denitrification in a membranebioreactor. Water Sci.Technol.30, 157-160. DOI: https://doi.org/10.2166/wst.1994.0263
Engler R. M. and Patrick W. H.Jr. 1974. Nitrate, removal from floodwater overlying flooded soils and sediments. J. Environ. Qual. 4,409. DOI: https://doi.org/10.2134/jeq1974.00472425000300040025x
Fennessy M. S. and Cronk J. K. 1997. The effectiveness and restoration potential of riparian ecotones for the management of non-point source pollution, particularly nitrate. Critical Reviews in Environmental Sci & Technol. 27 (4), 285-317. DOI: https://doi.org/10.1080/10643389709388502
Flere J. M . and Zhang T. C. 1999. Nitrate removal with sulfur- limestone autotrophicdenitrification processes. J. of Env. Engineerign. 125,721-729. DOI: https://doi.org/10.1061/(ASCE)0733-9372(1999)125:8(721)
Flis J. 1991. Stress corrosion cracking of structural steels in nitrate solutions. In: J. Flis (ed.) Corrosion of Metals and Hydrogen- Related Phenomena. 57-94. Materials Science Monographs, 59, Elsever Amsterdam, NL.
Fonseca A. D., Crespa J. et al. 2000. Drinking water denitrification using a nova! ion exchange membrane Bioreactor. En. Sci. Technol. 34, 1557-1562. DOI: https://doi.org/10.1021/es9910762
Frick B. R. and Richard Y. 1985. Experience with biological denitrification in a full Scale drinking water treatment plant. Vom Wasser. 64, 145-154.
Fried J. J. 1991. Nitrates and their control in EEC aquatic environment. In: I. Bogardi and R.D. Kuzelca, (eds.) Nitrate Contamination: Exposure, Consequence and Control. Springer- Verlag, Berlin, Germany, 3-II. Fritsche U. 1993. Removal of nitrate and other anions from water by yellow Bismuth Hydroxide.J. Environ. Sci. Health. A 28 (9), 1903-1913. DOI: https://doi.org/10.1007/978-3-642-76040-2_1
Gauntlett R. B. 1975. Nitrate removal from water by ion exchange. Water Treatment and Examination, 24, 172-193.
Gayle B. P., Boardman G. D., Sherreard J. H. and Benoit R.E. I 989. Biological denitrification of water. J. Envir. Engrg. ASCE, 115(5), 930-943. DOI: https://doi.org/10.1061/(ASCE)0733-9372(1989)115:5(930)
Ginocchio J. 1984. Nitrate levels in drinking water are becoming too high. Water Services, Switzerland. 88, 143-147.
Gopal R., Bhargava T. N. and Bhatti O.P. 1977. Nitrates in well waters ofRajasthan. Curr. Agric. 1 (3), 57.
Gros H. and Treutler K. 1986. Biological denitrification process with hydrogen oxidizing bacteria for drinking water treatment. Aqua, London, England, 5,288-290.
Gros H., Schnoor G. and Ruttan P. 1986. Nitrate removal from groundwater by autotrophic microorganisms. Water Supply. 4, 11-21.
Gros H. and Ginocchio J. 1982. Biological nitrification and denitrification on submerged mixing elements. Gas Wasser Abwasser, Zurich, Switzerland, 67, 312-321.
Gupta S. C. 198 I. Evaluation of quality of well waters in Udaipur District. Indian Jour. Environ. Hlth. 23(3), 195-202.
Guter G. A. 1982. Removal ofNitratefrom Contaminated Water Supplies for Public Use. Report EPA- 600/S2- 82-042, U.S. Environmental Protection Agency (EPA), Cincinnati, Ohio.
Guter G. A. 198 1. Removal of Nitrate from Contaminated Water Supplies for Public Use. EPA-600/$2-81/029, April, 1981 Environmental Protection Agency Cincinnati, Ohio.
Hammer M. J. 1991. Water and Wastewater Technology. 2nd edition.
Hamzah Ziad Abu Gharah. I996. Biological denitrification of high nitrate water: Influence of type of carbon source and nitrate loading. J. En. Sci. & lllth. A31 (7), 1651-1668. DOI: https://doi.org/10.1080/10934529609376448
Handa B. K., Goel D. K., Kumar A. and Sondhi T. N. 1982. Pollution of Ground Waters by Nitrates in Uttar Pradesh. IAWPC Tech. Annual. IX, 95-103.
Hill M. J., Hawksworth G. and Tatttersall G. 1973. Bacteria, Nitrosamines and cancer of stomach. Br. J. Cancer. 28, 562-567. DOI: https://doi.org/10.1038/bjc.1973.186
Hiscock K. M., Llyod J. W and lemer D. N. 1991. Review of natural and artificial denitrification of groundwater. Wat. Res. 25 (9), 1099- 1111. DOI: https://doi.org/10.1016/0043-1354(91)90203-3
Hoek J.P. Van der and Klapwijk A. 1987. Nitrate removal from groundwater. Wat. Res. 21 (8), 989-997. DOI: https://doi.org/10.1016/S0043-1354(87)80018-0
Hoek J. P. van der and Klapwijk A. 1985. Biological/ physical chemical methods for nitrate removal from groundwater. PT Procestec/miek. 40, 22-25.
Hoek J. P., rnn der and Klapwijk A. 1986. Feasibility study to biological/physical chemical nitrate removal from ground water. H,0 19, 53-58.
Hoek J.P. and van der 1985. Biological/physical chemical nitrate removal from groundwater- an environmental and financial attractive alternative. Proceedings of the congress "Nitrates in Water". SITE 85, 22-24. October.
Hoek J. P., van der. Kappelhof J. W. N. M. and Hijnen W. A. M. 1992. Biological nitrate removal from ground water by sulphur/ime stone denitrificaton. J Chemical Technol. and Biotechnol. 54 (2), 197-200.
Hoek J. P.. van der, Hoek W. F., van der and Klapwijk A. 1998. Nitrate removal from ground water - Use of nitrate selective resin and low concentrated regenerate. Water, Air and Soil Pollution 37, 41-43. DOI: https://doi.org/10.1007/BF00226478
Hoell W. and Feuerstein W. 1985. Combined Hardness and Nitrate/ sulphate removal from ground water by the carix ion exchange process. Water Supply. 3, 199-209.
Horold S., Tacke C. and Vorlop K. D. 1993. Catalytical removal of nitrate and nitrite from drinking water- I: screening for hydrogenation catalysis and influence of reaction conditions on activity and selectivity. Environmental Technology 14, 931-939. DOI: https://doi.org/10.1080/09593339309385367
Hounslow A. W. 1995. Water Quality Data, Analysis and Interpretation. CRC Lewis Publishers.
House of Lords 1989. Nitrate in Water. 16th Report, Session 1988-1989 of the Select Committee on the European Communities. HMSO, London.
Indushekhar V. K. Trivedi G. S. and Shah B.G, 1991. Removal of nitrate by electrodialysis desalination and water Re-use. volume 4, Proc. of Twelfth International Symposium. Institute of Chemical Engineers Rugby U.K., 15-18 April 1991.
Kinoshita K. 1988. Carbon- Electrochemical and Physicochemical Properties. John, Wiley and Sons, New York.
Knowles R. 1982. Denitrification. Microbiological Rev. 46(1), 43 -70. DOI: https://doi.org/10.1128/mr.46.1.43-70.1982
Kurt M., Dunn I. J. and Bourne J. R. l987. Biological denitrification of drinking water using autotrophic organisms with hydrogen in fluidized bed bio film reactor.Biotechnology Bioengineering. 29,493-501. DOI: https://doi.org/10.1002/bit.260290414
La Motta, Diaz E. and Andrade Salgado A. 1985. Autotrophic denitrification using sulphides. Plitechnica, Quito, Ecuador. 10, 65-76.
Lewandowski 1., Bakke R. and Characklis W. G. 1987. Nitrification and autotrophic denitrification in calcium alginate beads. Water Sci. Technol. 19, 175 -182. DOI: https://doi.org/10.2166/wst.1987.0199
Liang S., Mann M.A., Guter G. A., Kim P. H. S. and Hardean D. L. 1999.J4WA. 91 (2), 79-90. DOI: https://doi.org/10.1002/j.1551-8833.1999.tb08587.x
Liessens J., Gennonpre R., Beernaert S. and Verstraete W. 1993. Removing nitrate with a methyotrophic fluidized bed: Technology and Operating Performance..J.AWWA. 85, 144-154. DOI: https://doi.org/10.1002/j.1551-8833.1993.tb05972.x
Lin S. H. and Wu C. L. 1997. Nitrate removal from aqueous solution by ion exchange. Environ. Sci. Health. A32 (5), 1575-1589. DOI: https://doi.org/10.1080/10934529709376627
Lunkad S. K. 1994. Rising nitrate levels in groundwater and increasing N-fertilizer consumption.Bhu-Jal News, 4-10.
Majumdar D. and Gupta N. 2002. Nitrate pollution to groundwater and associated human health disorders. Indian J. Environ. Hlth. 42, 28-39.
Marquardt 0. K. 1987. Reverse osmosis for removing nitrate from water.Aqua, 1, 39-44. Martin G. 1982. Biological Denitrification of Water. Patent application 79/10154 France. Mason B. and Moore C. B. 1985. Principles of Geochemistry. Wiley Easstern Ltd. 350.
Miquel A. F. and Oldani M. A. 1991 Newly developed process for nitrate removal from drinking water. In: I. Bogardi and R. F. Kuzelka. (eds.) Nitrate Contamination: Expouse, Consequence and Control. Springer Verlag, Berlin, Gennany. pp 385-394. DOI: https://doi.org/10.1007/978-3-642-76040-2_28
Murphy P. 199I. Chemical removal of nitrate from Water.Nature. 350, 223-225. DOI: https://doi.org/10.1038/350223a0
Nixon N. 1992. English water utility tackles nitat4 removal. Water Engrg. Mgmt. 139, 27-28.
Ottley C. J., Davison W. and Edmonds W. M. 1997. Chemical catalysis of nitrate reduces by iron (ii) Geochimical et. Cosmochimica Acta. 61, 1819-1828. DOI: https://doi.org/10.1016/S0016-7037(97)00058-6
Pandey S. P., Narayanswamy V. S. and Hasan M. Z. 1979. Quality of well waters ofNagpur with special regard to Nitrates and Nitrites. Indian Jour. Environ. Hlth.21, 35-46.
Pepin-Lahellur J. 1930. Reduction of metallic nitrates and nitrated organic compounds in Acid medium..Ann. Acad Brasil Sci. 2,31-2
Routenbach R. and Kopp W. 1986. Separation of nitrate from well water by membrane process (reverse osmosis/eleetrodialysis reversal). Aqua, 5, 279-282.
Reddy K. R., Patrick W .H. and Phillips R. 1978. The role of nitrate diffusion in determining the order and rate of denitrification in flooded soil. I-Experimented results. Soil Sci. Soc. Am. J. 42, 268. DOI: https://doi.org/10.2136/sssaj1978.03615995004200020012x
Reevs T. G. 1972 Nitrogen removal - a literature review.JWPCF. 44(10)1895-1908.
Richard Y. and Leprince A. 1982. Pollution per les nitrates: traitments disponibles. Trib Cebedeau. 35, 21-33.
Richard Y. et al. 1980. Denitrification of water for human consumption. Progress in Water Tech. Oxford, England, 12, 173-191. DOI: https://doi.org/10.1016/B978-1-4832-8438-5.50017-0
Sakakibara Y., Araki K., Kuroda M, Tanaka T and Watanabe T. 1994. Denitrification and neutralization with an electrochemical and biological reactor. Water Sci Technol. 30, 151-155. DOI: https://doi.org/10.2166/wst.1994.0262
Schepers J. S., Frank K. D. and watts D.G. 1984. Influence of irrigation and nitrogen fertilization on groundwater quality. Proceeding Int. Union of Geodesy and Geophysics, Hamburg, West Germay. 21-32.
Schippers L. A., Copper A. B., Harfoot C. G. and Dyck W. J. I 993. Regulators of denitrification in an organic riparian soil. Soil Biol. Biochem. 25, 925. DOI: https://doi.org/10.1016/0038-0717(93)90095-S
Schippers J. C., Kriuth J. C., Mulder F.G. and van Lieshout J. W. 1987. Removal of nitrate by slow sulfur (limestone filtration). 4qua, 5, 274-280.
Segall D. A. and Bruell C. J. 1992. Electroosmotic contaminant - Removal process.J. ofEnv. Engr. I 18, I. DOI: https://doi.org/10.1061/(ASCE)0733-9372(1992)118:1(84)
Sell M. B., Feist H. R., Behling R. D., Kneifel K. and Peinemann K. V. 1993. Proceedings of the MembraneTechnology Conference. American Water Works Association, Baltimore, MD. pp I-4.
Siantar D. P., Schreir C. G., Chou C. S. and Reinhard M. 1996. Treatment of 1, 2 dibromo-3-chloropropane and nitrate- contaminated water with zero valent Iron or hydrogen / palladium catalysts. Wat Res. 30, 2315-2322. DOI: https://doi.org/10.1016/0043-1354(96)00120-0
Soares M. I. M., Belkin S. and Abeliovich A. 1988. Biological groundwater denitrification: laboratory studies. Waater Sci. Technol. 20(3), 189-195. DOI: https://doi.org/10.2166/wst.1988.0098
Soares M. I. M., Braester C., Belkin S. and Abeliovich A. 1991. Denitrification in laboratory sand columns: carbon regime, gas accumulation and hydraulic properties. Wat. Res. 25, 325-332. DOI: https://doi.org/10.1016/0043-1354(91)90013-G
Sontheimer H., Cornel P., Fettig J. and Rolunann U., 1982. Grundwasserveru.rreinigung- Bedrohung fur die offentliche Wasserversorgung 2. GWF- Wass. Abwass. 123,521-530.
Sorg T. J. 1979. Nitrate removal from drinking water. EPA Seminar on Nitrates in Ground Water. Kansas City, Mo, 3-4 October.
Sova R. J. 1986. The Chemical Removal of Nitrate from Water Supplies Using Ferrous Sulfates and Pickle Liquor. MS Thesis, Univ of Nebraska at Lincoln, Lincoln, Nebr.
Spalding R. F. and Exner M. E. 199 I. Nitrate contamination in the contiguous United States. In: Bogardi and R.D. Kuzelca (eds.) Nitrate Contamination: Exposure, Consequences and Control. Springer - Verlag, Gennany. pp 13-49. DOI: https://doi.org/10.1007/978-3-642-76040-2_2
Spalding R. F. and Exner M. E. 1993. Occurrence of nitrate in groundwater- a review.J.Envir. Quality, 22, 392-402. DOI: https://doi.org/10.2134/jeq1993.00472425002200030002x
Stumn W. and Morgan J. 1996. Aquatic Chemistry. Chemical Equilibrium and Rates in Natural Waters. Wiley 3rd edn. New York, p. 1022.
Szabo A. G. and Bartha L. G. 1 9 5 1. Silver catalysts in the reduction of nitrates by Ferrous Hydroxide. Acta Chem Hung. 1, 116.
Todd R. L., Lowrance R. R., Hendrickson 0., Asmussen, L. E. Leonard R., Fail, J. and Herrick B. 1983. Riparian vegetation as filters of nutrients exported from a coastal plain agricultural watershed In: R. R. Lowrance, R. L. Todd, L. E. Asmussen and R. A. Leomard (eds.) Nutrient Cycling in Agricultural Ecosystems. The University of Georgia College of Agriculture Experiment Station Special Publication.23, 485.
Tree Buffer protects Groundwater at contaminated site. 1994. Water en. Technol. 6, 15-16.
White D. A., Labayru R., Obermoller H. R., and Deryde X. 1991. The application of inorganic membranes to electrodialysis process. Desalination and Water Reuse. 4, 177-188. DOI: https://doi.org/10.1016/0011-9164(91)85128-H
Wilson W. S., Ball A. S. and Hinton R. H. 1999. Managing Risks of Nitrates to Human and the Environment. The Royal Society of Chemistry. DOI: https://doi.org/10.1533/9781845693206
Young G. K., Bungay H. R, Brown L. N. and Parsons W.A. 1964. Chemical reduction of nitrate in water. JWPCF 36, 395-398.
Young K. 1975. Geology: The Paradox ofEarth and Man. Houghton Miffin, Boston.
Zawaideh L. L. and Zhang T. C. 1998. The effects of pH and addition of an organic buffer (HEPES) on nitrate transformation in Fe" water systems. Wat. Sci. Tech. 38 107-115. DOI: https://doi.org/10.2166/wst.1998.0283