Effects of Selected Good’s pH Buffers on Nitrate Reduction by Iron Powder
Publication: Journal of Environmental Engineering
Volume 131, Issue 3
Abstract
The effects of three selected Good’s pH buffers on the performance of an system were evaluated. The Good’s pH buffer itself did not reduce nitrate directly. Nitrate reduction by iron powder at near-neutral pH was negligible in an unbuffered system, but it was greatly enhanced with the presence of the buffer. A significant amount of aqueous (or ) was released after adding the Good’s pH buffer into the system with or without nitrate. In general, the pH of the buffered solution increased from the initial pH ( , depending on buffer’s ) to near-neutral pH. After the initial pH hiking, the pH in the system was more or less stable for a period of time ( , usually concurrent with a fairly stable aqueous ). The pH then drifted to to 8.6, depending on the buffer’s initial concentration, the buffer’s , and the consumption of concurrent with nitrate reduction. While a common assumption made by researchers is that Good’s pH buffers do not directly participate in reaction processes involved in contaminant remediation, this study shows that as side effects, the Good’s pH buffer may react with iron powder.
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Acknowledgments
The writers gratefully acknowledge Dr. Klabunde, Department. of Chemistry, Kansas State University, for BET surface area analysis and Dr. Shea and Dr. Comfort, School of Natural Resource Sciences, Univ. of Nebraska-Lincoln (UNL) for their important suggestions and comments during the project. This research was supported in part by the EPA/EPSCoR Program (Project No. R-829422-010) and the Nebraska Research Initiative Program at the University of Nebraska. The College of Engineering and Technology at UNL provided matching funds for the project.
References
Alowitz, M. J., and Scherer, M. M. (2002). “Kinetics of nitrate, nitrite, and Cr(VI) reduction by iron metal.” Environ. Sci. Technol., 36, 299–306.
Charlet, L., Silvester, E., and Liger, E. (1998). “N-compound reduction and actinide immobilization in surficial fluids by Fe(II): the species, as major reductant.” Chem. Geol., 151, 85–93.
Cheng, I. F., Muftikian, R., Fernando, Q., and Korte, N. (1997). “Reduction of nitrate to ammonia by zero-valent iron.” Chemosphere, 35, 2689–2695.
Chew, C. F., and Zhang, T. C. (1999). “Abiotic degradation of nitrates using zero-valent iron and electrokinetic processes.” Environ. Eng. Sci., 16, 389–401.
Choe, S., Chang, Y. Y., Hwang, K. Y., and Khim, J. (2000). “Kinetics of reductive denitrification by nanoscale zero-valent iron.” Chemosphere, 41, 1307–1311.
Cornell, R. M., and Schwertmann, U. (1996). The iron oxides: Structure, properties, reactions, occurrence and uses. VCH, New York.
Dawson, R. M. C., and Elliott, D. C. (1986). Data for biochemical research, 3rd Ed., Oxford University Press, Oxford.
Ferguson, W. J. et al. (1980). “Hydrogen buffer for biological research.” Anal. Biochem., 104, 300–310.
Good, N. E. et al. (1976). “Hydrogen ion buffers for biological research.” Biochemistry, 5, 467–477.
Gu, B. et al. (1999). “Biogeochemical dynamics in zero-valent iron columns: Implications for permeable reactive barriers.” Environ. Sci. Technol., 33, 2170–2177.
Hansen, H. C. B., Koch, C. B., Nancke-Krogh, H., Borggaard, O. K., and Sørensen, J. (1996). “Abiotic nitrate reduction to ammonium: Key role of green rust.” Environ. Sci. Technol., 30, 2053–2056.
Hansen, H. C. B., and Koch, C. B. (1998). “Reduction of nitrate to ammonium by sulphate green rust: activation energy and reaction mechanism.” Clay Miner., 33, 87–101.
Hansen, H. C. B., Koch, C. B., Erbs, M., Guldberg, S., and Dickow, J. (2000). “Redox reaction of iron(II)iron(III) hydroxides (green rusts).” Division of Enviromental Chemistry Preprints of Extended Abstracts, Am. Chem. Soc., Washington, D.C., 40(2), 321–323.
Harms, S., Lipczynska-Kochany, E., Milbum, R. G., and Nadarajah, N. (1995). “Degradation of carbon tetrachloride in the presence of iron and sulphur containing compounds.” Prepr. Ext. Abstr. 209th ACS Natl. Meet., Am. Chem. Soc., Div. Environ. Chem., Am. Chem. Soc., Washington, D.C., 35, 825–828.
Huang, C. P., Wang, H. W., and Chiu, P. C. (1998). “Nitrate reduction by metallic iron.” Water Res., 32, 2357–2364.
Huang, Y. H. (2002). “Nitrate degradation by : Mechanisms, kinetics, and the role of iron oxide coatings.” PhD dissertation, Univ. of Nebraska-Lincoln.
Huang, Y. H., and Zhang, T. C. (2002). “Kinetics of nitrate reduction by iron at near neutral pH.” J. Environ. Eng., 128(7), 604–611.
Huang, Y. H., Zhang, T. C., Shea, P. J., and Comfort, S. D. (2003). “Effects of oxide coating and selected cations on nitrate reduction by iron metal.” J. Environ. Qual., 32, 1306–1315.
Klausen, J., Trober, S. P., Haderlein, S. B., and Schwarzenbach, R. P. (1995). “Reduction of substituted nitrobenzenes by Fe(II) in aqueous mineral suspensions.” Environ. Sci. Technol., 29, 2394–2404.
Matheson, L. J., and Tratnyek, P. G. (1994). “Reductive dehalogenation of chlorinated methanes by iron metal.” Environ. Sci. Technol., 28, 2045–2053.
Moshtev, R. V., and Hristova, N. I. (1967). “Kinetics and mechanisms of the electrode reactions on iron in nitrate solutions.” Corros. Sci., 7, 255–264.
Odziemkowski, M. S., Gui, L., and Gillham, R. W. (2000a). “Reduction of -nitrosodimethylamine with granular iron and nickel-enhanced iron II. Mechanistic studies.” Environ. Sci. Technol., 34, 3495–3500.
Odziemkowski, M. S., Gui, L., Gillham, R. W., and Irish, D. E. (2000b). “The role of oxide films in the reduction of -nitrosodimethylamine with reference to the iron groundwater remediation technology.” Oxide Films, K. R. Hebert, R. S. Lillard, and B. R. MacDougall, eds. The Electrochemical Society, Pennington, N.J., 357–368.
Perrin, D. D., and Dempsey, B. (1974). Buffers for pH and metal ion control, Chapman and Hall, London, U.K.
Rahman, A., and Agrawal, A. (1997). “Reduction of nitrate and nitrite by iron metal: implications for ground water remediation.” Prepr. Ext. Abstr. 213th ACS Natl. Meet., Am. Chem. Soc., Div. Environ. Chem., Am. Chem. Soc., Washington, D.C., 37(1), 57–159.
Roh, Y., Lee, S. Y., and Elless, M. P. (2000). “Characterization of corrosion products in the permeable reactive barriers.” Environ. Geol., 40, 184–194.
Scherer, M. M., Balko, B. A., and Tratnyek, P. G. (1998). “The role of oxides in reduction reactions at the metal-water interface.” Mineral-water interfacial reactions: Kinetics and mechanisms, ACS Symp. Series 715, D. Sparks and T. Grundl, eds., American Chemical Society, Washington, D.C., 301–322.
Schreier, C. G., and Reinhard, M. (1995). “Transformation of chlorinated ethylenes by iron powder in 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) buffer.” Prepr. Ext. Abstr. 209th ACS Natl. Meet., Am. Chem. Soc., Div. Environ. Chem., Am Chem. Soc., Washington, D.C., 35, 833–835.
Schultz, C. A., and Grundl, T. J. (2000). “pH dependence on reduction rate of 4-Cl-nitrobenzen by Fe(II) montmorillonite systems.” Environ. Sci. Technol., 34, 3641–3648.
Siantar, D. P., Schrefer, 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.” Water Res., 30, 2315–2322.
Sigma. (2001). “Useful pH ranges of selected biological buffers (25 C, 0.1 M).” Buffer Reference Center, Buffer Explorer, Biochemicals of Product Lines, www.sigmaaldrich.com
Singh, J. (1996). “Transformation of atrazine and nitrate in contaminated water by iron-promoted processes.” Proc., Water Environment Federation 69th Annual Conf. and Exposition, 3, Water Environment Federation, Alexandria, Va., 143–148.
Squillace, P. J., Scott, J. C., Moran, M. J., Nolan, B. T., and Kolpin, D. W. (2002). “VOCs, pesticides, nitrate, and their mixtures in groundwater used for drinking water in the United States.” Environ. Sci. Technol., 36, 1923–1932.
Strathmann, T. J., and Stone, A. T. (2002). “Reduction of the pesticides oxamyl and methomyl by : Effect of pH and inorganic ligands.” Environ. Sci. Technol., 36, 653–661.
Stumm, W. (1992). Chemistry of the solid-water interface: Processes at the mineral-water and particle-water interface of natural systems, Wiley, New York.
Stumm, W., and Morgan, J. J. (1995). Aquatic chemistry: Chemical equilibria and rates in natural waters, Wiley, New York.
Tamaura, Y., Buduan, P. V., and Katsura, T. (1981). “Studies on the oxidation of iron (II) ion during the formation of and by airoxidation of suspensions.” J. Chem. Soc. Dalton Trans., 1981, 1807–1811.
Tamaura, Y., Ito, K., and Katsura T. (1983). “Transformation of to by adsorption of iron(II) ion on .” J. Chem. Soc. Dalton Trans., 1983, 189–194.
Tamura, H., Katsumi, G., and Nagayama, M. (1976). “The effect of ferric hydroxide on the oxygenation of ferrous ions in neutral solutions.” Corros. Sci., 16, 197–207.
Till, B. A., Weathers, L. J., and Alvarez, P. J. J. (1998). “Fe(0)-supported autotrophic denitrification.” Environ. Sci. Technol., 32, 634–641.
Tronc, E., and Jolivet, J.-P. (1984). “Exchange and redox reactions at the interface of spinel-like iron oxide colloids in solution: Fe(II) adsorption.” Adsorpt. Sci. Technol., 1, 247–251.
United States Environmental Protection Agency (USEPA). (2002). “Guidance for quality assurance project plans for modeling (EAP QA/G-5M).” EPA/240/R-02/007, USEPA, Office of Environmental Information, Washington, D.C.
Van Hecke, K., Van Cleemput, O., and Baert, L. (1990). “Chemo-denitrification of nitrate-polluted water.” Environ. Pollut., 63, 261–274.
Vikesland, P., and Valentine, R. L. (2002). “Iron oxide surface-catalyzed oxidation of ferrous iron by monochloramine: implications of oxide type and carbonate on reactivity.” Environ. Sci. Technol., 36, 512–519.
Westerhoff, P. J. (2003). “Reduction of nitrate, bromate, and chlorate by zero-valent Fe(0).” J. Environ. Eng., 129(1), 10–16.
Zawaideh, L. L., and Zhang, T. C. (1998). “The effects of pH and addition of an organic buffer (HEPES) on nitrate transformation in -water systems.” Water Sci. Technol., 38, 107–115.
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Received: Oct 10, 2003
Accepted: Mar 9, 2004
Published online: Mar 1, 2005
Published in print: Mar 2005
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