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[Synchronous treatment of heavy metal ions and nitrate by zero-valent iron].
Huan Jing Ke Xue. 2009 Mar 15; 30(3):775-9.HJ

Abstract

The wastewater which contains bivalent copper and nitrate, bivalent nickel and nitrate, hexavalent chromium and nitrate were simultaneously treated by the zero-valent iron (Fe(0)) system to investigate the feasibility of using Fe(0) for the remediation of contaminated groundwater. The experimental results indicate that nitrate has no obvious effect on the removal of heavy metals, and different heavy metal has different impacts on the removal of nitrate. Bivalent copper accelerates the nitrate removal percentage and the reaction rate. 50 mg x L(-1) bivalent copper made the nitrate removal percentage in 120 min increase from 38.2% to 95.0%, meanwhile made k(obs) of the nitrate reduction increase from 0.004 3 to 0.033 9 min(-1). And the more the concentrations of bivalent copper are, the higher the nitrate removal percentage and the reaction rate are. And it is the bivalent copper that makes the apparent activation energy of the nitrate reduction by Fe(0) decrease from 40.8 k x mol(-1) to 21.1 kJ x mol(-1), which leads to the increase of the reaction rate. When Fe(0) simultaneously treats the wastewater containing bivalent nickel and nitrate, they have no obvious effects on each other. When Fe(0) simultaneously treats the wastewater containing hexavalent chromium and nitrate, the results show the nitrate concentration remains unchanged, and prove that hexavalent chromium decreases the nitrate removal speed.

Authors+Show Affiliations

School of Bioscience, Taizhou University, Linhai 317000, China. zhangzhen-911@163.comNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

chi

PubMed ID

19432327

Citation

Zhang, Zhen, et al. "[Synchronous Treatment of Heavy Metal Ions and Nitrate By Zero-valent Iron]." Huan Jing Ke Xue= Huanjing Kexue, vol. 30, no. 3, 2009, pp. 775-9.
Zhang Z, Hao ZW, Liu WL, et al. [Synchronous treatment of heavy metal ions and nitrate by zero-valent iron]. Huan Jing Ke Xue. 2009;30(3):775-9.
Zhang, Z., Hao, Z. W., Liu, W. L., & Xu, X. H. (2009). [Synchronous treatment of heavy metal ions and nitrate by zero-valent iron]. Huan Jing Ke Xue= Huanjing Kexue, 30(3), 775-9.
Zhang Z, et al. [Synchronous Treatment of Heavy Metal Ions and Nitrate By Zero-valent Iron]. Huan Jing Ke Xue. 2009 Mar 15;30(3):775-9. PubMed PMID: 19432327.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Synchronous treatment of heavy metal ions and nitrate by zero-valent iron]. AU - Zhang,Zhen, AU - Hao,Zhi-Wei, AU - Liu,Wen-Li, AU - Xu,Xin-Hua, PY - 2009/5/13/entrez PY - 2009/5/13/pubmed PY - 2010/6/23/medline SP - 775 EP - 9 JF - Huan jing ke xue= Huanjing kexue JO - Huan Jing Ke Xue VL - 30 IS - 3 N2 - The wastewater which contains bivalent copper and nitrate, bivalent nickel and nitrate, hexavalent chromium and nitrate were simultaneously treated by the zero-valent iron (Fe(0)) system to investigate the feasibility of using Fe(0) for the remediation of contaminated groundwater. The experimental results indicate that nitrate has no obvious effect on the removal of heavy metals, and different heavy metal has different impacts on the removal of nitrate. Bivalent copper accelerates the nitrate removal percentage and the reaction rate. 50 mg x L(-1) bivalent copper made the nitrate removal percentage in 120 min increase from 38.2% to 95.0%, meanwhile made k(obs) of the nitrate reduction increase from 0.004 3 to 0.033 9 min(-1). And the more the concentrations of bivalent copper are, the higher the nitrate removal percentage and the reaction rate are. And it is the bivalent copper that makes the apparent activation energy of the nitrate reduction by Fe(0) decrease from 40.8 k x mol(-1) to 21.1 kJ x mol(-1), which leads to the increase of the reaction rate. When Fe(0) simultaneously treats the wastewater containing bivalent nickel and nitrate, they have no obvious effects on each other. When Fe(0) simultaneously treats the wastewater containing hexavalent chromium and nitrate, the results show the nitrate concentration remains unchanged, and prove that hexavalent chromium decreases the nitrate removal speed. SN - 0250-3301 UR - https://www.unboundmedicine.com/medline/citation/19432327/[Synchronous_treatment_of_heavy_metal_ions_and_nitrate_by_zero_valent_iron]_ L2 - https://medlineplus.gov/iron.html DB - PRIME DP - Unbound Medicine ER -
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