Application of bimetallic iron (BioCAT slurry) for pentachlorophenol removal from sandy soil

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题名:	Application of bimetallic iron (BioCAT slurry) for pentachlorophenol removal from sandy soil
作者:	張木彬;Dien, Nguyen Thanh;De Windt, Wim;Buekens, Alfons;Chang, Moo Been
贡献者:	工學院環境工程研究所
关键词:	Applied sciences;Atmospheric pollution;Bimetallic iron;BioCAT;Biocatalysis;Biomass;Chemical engineering;chlorides;Chlorine - chemistry;Dechlorination;Decontamination. Miscellaneous;Exact sciences and technology;iron;Iron - chemistry;isomers;Metal Nanoparticles - chemistry;Microscopy, Electron, Scanning;Nanoparticles;oxidation;Oxidation-Reduction;Palladium - chemistry;Pentachlorophenol;Pentachlorophenol - chemistry;Pentachlorophenol-contaminated soil;phenol;polluted soils;Pollution;Reactors;remediation;sandy soils;Shewanella - metabolism;Silicon Dioxide;slurries;Soil and sediments pollution;Soil Pollutants - chemistry;soil pollution
日期:	2013-05-05
上传时间:	2026-04-23 14:59:47 (UTC+8)
出版者:	Elsevier;Kidlington: Elsevier B.V
摘要:	摘要： ► Sandy soil spiked with PCP was remediated with bimetallic iron under ambient conditions. ► After 21 days of treatment a PCP removal efficiency of 90% was achieved with a dosage of 600mg BioCAT slurry/kg-soil. ► Reductive dechlorination is the main pathway of PCP elimination from soil slurries contacted with bimetallic iron. ► The evidence for reductive dechlorination: the intermediate products as well as release of chlorides were found. Bimetallic iron nanoparticles have mostly been applied to the degradation of chlorinated compounds in the aqueous phase. In this study, the degradation of pentachlorophenol (PCP) spiked into sandy soil is considered as a first exploratory step for remediating PCP in real contaminated soil using a commercial preparation of bimetallic iron (Trade name BioCAT). After 21 days of treatment a PCP removal efficiency of 90% was achieved, along with 70% dechlorination efficiency, for a dosage of 600mg BioCAT slurry/kg soil. Degradation of PCP by BioCAT follows first order kinetics in PCP. Stepwise dechlorination is the main pathway of PCP elimination from soil slurries contacted with BioCAT. Such dechlorination is confirmed by the appearance of intermediate products, as well as by release of chlorides. Additionally, the increasing pH value and the rapid decrease of the oxidation/reduction potential (ORP) also attest to the reductive dechlorination of PCP. The reaction products comprehend lower chlorinated phenols, including three TeCP isomers, four TrCP isomers, four DCP isomers, two MCP isomers and phenol. These findings indicate that BioCAT could be applied for field treatment of PCP-contaminated soil under ambient conditions. 其他題名： J Hazard Mater 出版者： Kidlington: Elsevier B.V 出版日期： 2013-05-15 出處： Journal of hazardous materials, 2013-05, Vol.252-253, p.83-90 版權： 2013 Elsevier B.V. 版權： 2014 INIST-CNRS 版權： Copyright © 2013 Elsevier B.V. All rights reserved. 識別號： ISSN: 0304-3894 識別號： ISSN: 1873-3336 識別號： EISSN: 1873-3336 識別號： DOI: 10.1016/j.jhazmat.2013.02.029 識別號： PMID: 23500793 識別號： CODEN: JHMAD9
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