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Evaluation of activated carbon fiber supported nanoscale zero-valent iron for chromium (VI) removal from groundwater in a permeable reactive column.
J Environ Manage. 2017 Oct 01; 201:378-387.JE

Abstract

An activated carbon fiber supported nanoscale zero-valent iron (ACF-nZVI) composite for Cr(VI) removal from groundwater was synthesized according to the liquid phase reduction method. The techniques of N2 adsorption/desorption, FESEM, EDX, XRD and XPS were used to characterize the ACF-nZVI composite and the interaction between the ACF-nZVI composite and Cr(VI) ions. Batch experiments were conducted to evaluate the effects of several factors, including the amount of nZVI on activated carbon fiber (ACF), pH value, initial Cr(VI) concentration, and co-existing ions on Cr(VI) removal. The results indicate that presence of ACF can inhibit the aggregation of nanoscale zero-valent iron (nZVI) particles and increase its reactivity, and the Cr(VI) removal efficiency increases with increasing amounts of nZVI on ACF and a decrease in the initial Cr(VI) concentration. In acidic conditions, almost 100% of Cr(VI) in solution can be removed after 60 min of reaction, and the removal efficiency decreases with increasing initial pH values. The Cr(VI) removal is also dependent on the co-existing ions. Reusability experiments on ACF-nZVI demonstrate that the ACF-nZVI composite can keep a high reactivity after five successive reduction cycles. The removal mechanisms are proposed as a two-step interaction including the physical adsorption of Cr(VI) on the surface or inner layers of the ACF-nZVI composite and the subsequent reduction of Cr(VI) to Cr(III) by nZVI.

Authors+Show Affiliations

College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China. Electronic address: qugz@nwsuaf.edu.cn.College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China.College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China.College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28697381

Citation

Qu, Guangzhou, et al. "Evaluation of Activated Carbon Fiber Supported Nanoscale Zero-valent Iron for Chromium (VI) Removal From Groundwater in a Permeable Reactive Column." Journal of Environmental Management, vol. 201, 2017, pp. 378-387.
Qu G, Kou L, Wang T, et al. Evaluation of activated carbon fiber supported nanoscale zero-valent iron for chromium (VI) removal from groundwater in a permeable reactive column. J Environ Manage. 2017;201:378-387.
Qu, G., Kou, L., Wang, T., Liang, D., & Hu, S. (2017). Evaluation of activated carbon fiber supported nanoscale zero-valent iron for chromium (VI) removal from groundwater in a permeable reactive column. Journal of Environmental Management, 201, 378-387. https://doi.org/10.1016/j.jenvman.2017.07.010
Qu G, et al. Evaluation of Activated Carbon Fiber Supported Nanoscale Zero-valent Iron for Chromium (VI) Removal From Groundwater in a Permeable Reactive Column. J Environ Manage. 2017 Oct 1;201:378-387. PubMed PMID: 28697381.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of activated carbon fiber supported nanoscale zero-valent iron for chromium (VI) removal from groundwater in a permeable reactive column. AU - Qu,Guangzhou, AU - Kou,Liqing, AU - Wang,Tiecheng, AU - Liang,Dongli, AU - Hu,Shibin, Y1 - 2017/07/08/ PY - 2017/05/12/received PY - 2017/07/04/revised PY - 2017/07/05/accepted PY - 2017/7/12/pubmed PY - 2017/11/29/medline PY - 2017/7/12/entrez KW - Activated carbon fiber KW - Groundwater KW - Heavy metal KW - Nanoscale zero-valent iron KW - Removal SP - 378 EP - 387 JF - Journal of environmental management JO - J. Environ. Manage. VL - 201 N2 - An activated carbon fiber supported nanoscale zero-valent iron (ACF-nZVI) composite for Cr(VI) removal from groundwater was synthesized according to the liquid phase reduction method. The techniques of N2 adsorption/desorption, FESEM, EDX, XRD and XPS were used to characterize the ACF-nZVI composite and the interaction between the ACF-nZVI composite and Cr(VI) ions. Batch experiments were conducted to evaluate the effects of several factors, including the amount of nZVI on activated carbon fiber (ACF), pH value, initial Cr(VI) concentration, and co-existing ions on Cr(VI) removal. The results indicate that presence of ACF can inhibit the aggregation of nanoscale zero-valent iron (nZVI) particles and increase its reactivity, and the Cr(VI) removal efficiency increases with increasing amounts of nZVI on ACF and a decrease in the initial Cr(VI) concentration. In acidic conditions, almost 100% of Cr(VI) in solution can be removed after 60 min of reaction, and the removal efficiency decreases with increasing initial pH values. The Cr(VI) removal is also dependent on the co-existing ions. Reusability experiments on ACF-nZVI demonstrate that the ACF-nZVI composite can keep a high reactivity after five successive reduction cycles. The removal mechanisms are proposed as a two-step interaction including the physical adsorption of Cr(VI) on the surface or inner layers of the ACF-nZVI composite and the subsequent reduction of Cr(VI) to Cr(III) by nZVI. SN - 1095-8630 UR - https://www.unboundmedicine.com/medline/citation/28697381/Evaluation_of_activated_carbon_fiber_supported_nanoscale_zero_valent_iron_for_chromium__VI__removal_from_groundwater_in_a_permeable_reactive_column_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0301-4797(17)30676-X DB - PRIME DP - Unbound Medicine ER -