Nitrate reduction over nanoscale zero-valent iron prepared by hydrogen reduction of goethite

Liu, H. B., Chen, T. H., Chang, D. Y., Chen, D., Liu, Y., He, H. P., Yuan, P., & Frost, R. L. (2012) Nitrate reduction over nanoscale zero-valent iron prepared by hydrogen reduction of goethite. Materials Chemistry and Physics, 133(1), pp. 205-211.

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Nitrate reduction with nanoscale zero-valent iron (NZVI) was reported as a potential technology to remove nitrate from nitrate-contaminated water. In this paper, nitrate reduction with NZVI prepared by hydrogen reduction of natural goethite (NZVI-N, -N represents natural goethite) and hydrothermal goethite (NZVI-H, -H represents hydrothermal goethite) was conducted. Besides, the effects of reaction time, nitrate concentration, iron-to-nitrate ratio on nitrate removal rate over NZVI-H and NZVI-N were investigated. To prove their excellent nitrate reduction capacities, NZVI-N and NZVI-H were compared with ordinary zero-valent iron (OZVI-N) through the static experiments. Based on all above investigations, the mechanism of nitrate reduction with NZVI-N was proposed. The result showed that reaction time, nitrate concentration, iron-to-nitrate ratio played an important role in nitrate reduction by NZVI-N and NZVI-H. Compared with OZVI, NZVI-N and NZVI-H showed little relationship with pH. And NZVI-N for nitrate composition offers a higher stability than NZVI-H because of the existence of Al-substitution. Furthermore, NZVI-N, prepared by hydrogen reduction of goethite, has higher activity for nitrate reduction and the products contain hydrogen, nitrogen, NH 4 +, a little nitrite, but no NOx, meanwhile NZVI-N was oxidized to Fe 2+. It is a relatively easy and cost-effective method for nitrate removal, so NZVI-N reducing nitrate has a great potential application in nitrate removal of groundwater. © 2012 Elsevier B.V.

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ID Code: 51503
Item Type: Journal Article
Refereed: Yes
Additional Information: Export Date: 8 July 2012 Source: Scopus CODEN: MCHPD Language of Original Document: English Correspondence Address: Chen, T.H.; School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, China; email: References: Card, S., Marty, S.K., (1999) Archives of Environmental Health, 54, p. 242; Belgiorno, V., Napoll, R.M., (2000) Water Science and Technology, 42, p. 37; Wakida, F.T., Lerner, D.N., (2005) Water Research, 39, p. 3; Rivett, M.O., Buss, S.R., Morgan, P., Smith, J.W.N., Bemment, C.D., (2008) Water Research, 42, p. 4215; Spalding, R.F., Exner, M.E., (1993) Environment Quality, 22, p. 392; Michael, J.A., Scherer, M.M., (2002) Environmental Science and Technology, 36, p. 299; Huang, C.P., Wang, H.G., (1998) Water Research, 32, p. 2257; Francis, C., Rosy, M., (1997) Chemosphere, 35, p. 2689; Zawaideh, L.L., Zhang, T.C., (1998) Environmental Science and Technology, 38, p. 107; Oliver, S., Markus, E., Scherer, M., (2000) Groundwater, 38, p. 403; Huang, Y.H., Zhang, T.C., (2004) Water Research, 38, p. 2631; Westerhoff, P., James, J., (2003) Water Research, 37, p. 1818; Sorg, T.J., (1978) Journal of American Water Works Association, 70, p. 105; Luk, G.K., (2002) Advances in Environmental Research, 6, p. 441; Shrimali, M., Singh, K.P., (2001) Environmental Pollution, 112, p. 351; Su, C.M., Robert, W.P., (2004) Environmental Science and Technology, 38, p. 2715; Paul, W.J., (2003) Water Research, 37, p. 1818; Hu, H.Y., Goto, N., Fujie, K., (2001) Water Research, 35, p. 2789; Cheng, I., (1991) Chemosphere, 35, p. 2689; Chew, C.F., Zhang, T.C., (1998) Environmental Science and Technology, 38, p. 135; Choe, S., (2000) Chemosphere, 41, p. 1307; Gordon, C.C.Y., Lee, H.L., (2005) Water Research, 39, p. 884; Liu, X.H., Yan, X.C., Li, W., (2002) Metal Functional Materials, 9, p. 8; Gong, X., Chen, T.H., Qing, C.S., Gao, W., (2008) Journal of the Chinese Ceramic Society, 36 (6), pp. 383-389; Liu, Y., Chen, T.H., Sun, Y.B., Huang, X.M., Shi, Y., (2008) Proceedings of the 2nd International Conference on Asian-European Environmental Technology and Knowledge Transfer, p. 218; Huang, Y.H., Zhang, T.C., (2002) Environmental Engineering, 128, p. 604; Ekstrom, B.E., Deric, R.L., Andrew, S.M., Colleen, M.H., (2010) Geochimica et Cosmochimica Acta, 74, p. 7086; Wang, C.B., Zhang, W.X., (1997) Environmental Science and Technology, 31, p. 2154; Andrey, J.Z., Jackie, Y.Y., (2000) Nature, 403, p. 65; Ruan, H.D., Gilkes, R.J., (1995) Clays and Clay Minerals, 43, p. 196; Hwang, Y.H., Kim, D.G., Shin, H.S., (2011) Journal of Hazardous Materials, 185, p. 1513
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Keywords: Al-substituted goethite, Groundwater, Nanoscale zero-valent iron, Natural goethite, Nitrate reduction, Al-substitution, Cost-effective methods, Hydrogen reduction, Nitrate concentration, Nitrate removal, Potential applications, Potential technologies, Static experiments, Zero-valent iron, Aluminum, Hydrogen, Iron, Nanotechnology, Nitrates, Nitrogen removal
DOI: 10.1016/j.matchemphys.2012.01.008
ISSN: 1879-3312 (online) 0254-0584 (print)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Elsevier B.V. All rights reserved.
Deposited On: 09 Jul 2012 23:18
Last Modified: 10 Jul 2012 02:40

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