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Nanoscale zero-valent iron supported by biochars produced at different temperatures: Synthesis mechanism and effect on Cr(VI) removal.
Environ Pollut. 2017 Apr; 223:153-160.EP

Abstract

Biochar-supported nanoscale zero-valent iron (nZVI) produced under different temperatures was studied to evaluate the effect of the nZVI-biochar composite on the removal of hexavalent chromium (Cr(VI)) in solution. The structure of biochar-supported nZVI and its roles in Cr(VI) removal were investigated by X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and batch experiments. The XRD revealed that the removal rate of Cr(VI) for the nZVI supported by rice straw pyrolyzed at 400 °C (RS400) was much greater than that for other supporting biochar, and the FTIR further indicated that the carboxyl groups and silicon mineral within the biochar served as dual support sites for nZVI. NZVI-RS400 exhibited the highest removal amount of Cr(VI) at approximately 40.0 mg/g under an initial pH of 4.0, possibly due to both the reduction and adsorption processes. Therefore, the RS400-supported nanoscale zero-valent iron could be a preferable material for Cr(VI)-contaminated groundwater.

Authors+Show Affiliations

Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China. Electronic address: mfchen@issas.ac.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28110906

Citation

Qian, Linbo, et al. "Nanoscale Zero-valent Iron Supported By Biochars Produced at Different Temperatures: Synthesis Mechanism and Effect On Cr(VI) Removal." Environmental Pollution (Barking, Essex : 1987), vol. 223, 2017, pp. 153-160.
Qian L, Zhang W, Yan J, et al. Nanoscale zero-valent iron supported by biochars produced at different temperatures: Synthesis mechanism and effect on Cr(VI) removal. Environ Pollut. 2017;223:153-160.
Qian, L., Zhang, W., Yan, J., Han, L., Chen, Y., Ouyang, D., & Chen, M. (2017). Nanoscale zero-valent iron supported by biochars produced at different temperatures: Synthesis mechanism and effect on Cr(VI) removal. Environmental Pollution (Barking, Essex : 1987), 223, 153-160. https://doi.org/10.1016/j.envpol.2016.12.077
Qian L, et al. Nanoscale Zero-valent Iron Supported By Biochars Produced at Different Temperatures: Synthesis Mechanism and Effect On Cr(VI) Removal. Environ Pollut. 2017;223:153-160. PubMed PMID: 28110906.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nanoscale zero-valent iron supported by biochars produced at different temperatures: Synthesis mechanism and effect on Cr(VI) removal. AU - Qian,Linbo, AU - Zhang,Wenying, AU - Yan,Jingchun, AU - Han,Lu, AU - Chen,Yun, AU - Ouyang,Da, AU - Chen,Mengfang, Y1 - 2017/01/19/ PY - 2016/09/30/received PY - 2016/12/14/revised PY - 2016/12/27/accepted PY - 2017/1/24/pubmed PY - 2017/4/26/medline PY - 2017/1/24/entrez KW - Adsorption KW - Biochars KW - Hexavalent chromium KW - Nanoscale zero-valent iron KW - Reduction SP - 153 EP - 160 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ. Pollut. VL - 223 N2 - Biochar-supported nanoscale zero-valent iron (nZVI) produced under different temperatures was studied to evaluate the effect of the nZVI-biochar composite on the removal of hexavalent chromium (Cr(VI)) in solution. The structure of biochar-supported nZVI and its roles in Cr(VI) removal were investigated by X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and batch experiments. The XRD revealed that the removal rate of Cr(VI) for the nZVI supported by rice straw pyrolyzed at 400 °C (RS400) was much greater than that for other supporting biochar, and the FTIR further indicated that the carboxyl groups and silicon mineral within the biochar served as dual support sites for nZVI. NZVI-RS400 exhibited the highest removal amount of Cr(VI) at approximately 40.0 mg/g under an initial pH of 4.0, possibly due to both the reduction and adsorption processes. Therefore, the RS400-supported nanoscale zero-valent iron could be a preferable material for Cr(VI)-contaminated groundwater. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/28110906/Nanoscale_zero_valent_iron_supported_by_biochars_produced_at_different_temperatures:_Synthesis_mechanism_and_effect_on_Cr_VI__removal_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(16)31574-3 DB - PRIME DP - Unbound Medicine ER -