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Evaluation on the Nanoscale Zero Valent Iron Based Microbial Denitrification for Nitrate Removal from Groundwater.
Sci Rep 2015; 5:12331SR

Abstract

Nanoscale zero valent iron (NZVI) based microbial denitrification has been demonstrated to be a promising technology for nitrate removal from groundwater. In this work, a mathematical model is developed to evaluate the performance of this new technology and to provide insights into the chemical and microbial interactions in the system in terms of nitrate reduction, ammonium accumulation and hydrogen turnover. The developed model integrates NZVI-based abiotic reduction of nitrate, NZVI corrosion for hydrogen production and hydrogen-based microbial denitrification and satisfactorily describes all of the nitrate and ammonium dynamics from two systems with highly different conditions. The high NZVI corrosion rate revealed by the model indicates the high reaction rate of NZVI with water due to their large specific surface area and high surface reactivity, leading to an effective microbial nitrate reduction by utilizing the produced hydrogen. The simulation results further suggest a NZVI dosing strategy (3-6 mmol/L in temperature range of 30-40 °C, 6-10 mmol/L in temperature range of 15-30 °C and 10-14 mmol/L in temperature range of 5-15 °C) during groundwater remediation to make sure a low ammonium yield and a high nitrogen removal efficiency.

Authors+Show Affiliations

Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China.State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26199053

Citation

Peng, Lai, et al. "Evaluation On the Nanoscale Zero Valent Iron Based Microbial Denitrification for Nitrate Removal From Groundwater." Scientific Reports, vol. 5, 2015, p. 12331.
Peng L, Liu Y, Gao SH, et al. Evaluation on the Nanoscale Zero Valent Iron Based Microbial Denitrification for Nitrate Removal from Groundwater. Sci Rep. 2015;5:12331.
Peng, L., Liu, Y., Gao, S. H., Chen, X., Xin, P., Dai, X., & Ni, B. J. (2015). Evaluation on the Nanoscale Zero Valent Iron Based Microbial Denitrification for Nitrate Removal from Groundwater. Scientific Reports, 5, p. 12331. doi:10.1038/srep12331.
Peng L, et al. Evaluation On the Nanoscale Zero Valent Iron Based Microbial Denitrification for Nitrate Removal From Groundwater. Sci Rep. 2015 Jul 22;5:12331. PubMed PMID: 26199053.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation on the Nanoscale Zero Valent Iron Based Microbial Denitrification for Nitrate Removal from Groundwater. AU - Peng,Lai, AU - Liu,Yiwen, AU - Gao,Shu-Hong, AU - Chen,Xueming, AU - Xin,Pei, AU - Dai,Xiaohu, AU - Ni,Bing-Jie, Y1 - 2015/07/22/ PY - 2015/03/27/received PY - 2015/06/24/accepted PY - 2015/7/23/entrez PY - 2015/7/23/pubmed PY - 2016/6/29/medline SP - 12331 EP - 12331 JF - Scientific reports JO - Sci Rep VL - 5 N2 - Nanoscale zero valent iron (NZVI) based microbial denitrification has been demonstrated to be a promising technology for nitrate removal from groundwater. In this work, a mathematical model is developed to evaluate the performance of this new technology and to provide insights into the chemical and microbial interactions in the system in terms of nitrate reduction, ammonium accumulation and hydrogen turnover. The developed model integrates NZVI-based abiotic reduction of nitrate, NZVI corrosion for hydrogen production and hydrogen-based microbial denitrification and satisfactorily describes all of the nitrate and ammonium dynamics from two systems with highly different conditions. The high NZVI corrosion rate revealed by the model indicates the high reaction rate of NZVI with water due to their large specific surface area and high surface reactivity, leading to an effective microbial nitrate reduction by utilizing the produced hydrogen. The simulation results further suggest a NZVI dosing strategy (3-6 mmol/L in temperature range of 30-40 °C, 6-10 mmol/L in temperature range of 15-30 °C and 10-14 mmol/L in temperature range of 5-15 °C) during groundwater remediation to make sure a low ammonium yield and a high nitrogen removal efficiency. SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/26199053/Evaluation_on_the_Nanoscale_Zero_Valent_Iron_Based_Microbial_Denitrification_for_Nitrate_Removal_from_Groundwater_ L2 - http://dx.doi.org/10.1038/srep12331 DB - PRIME DP - Unbound Medicine ER -