文献类型：期刊文献

英文题名：Permeable reactive barrier of surface hydrophobic granular activated carbon coupled with elemental iron for the removal of 2,4-dichlorophenol in water

作者：Yang, Ji[1];Cao, Limei[2];Guo, Rui[2];Jia, Jinping[2]

机构：[1]E China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China

年份：2010

卷号：184

期号：1-3

起止页码：782

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20104213301156);WOS:【SCI-EXPANDED(收录号:WOS:000284504800105)】；

基金：This research is based upon work supported by the National Natural Science Foundation of China (Project No. 20507014), National High Technology Program (No. 2009AA062603), Foundation of Chinese Education Department for Returning Oversea Scholars and Shanghai Natural Science Foundation (Project No. 05ZR14071), and Shanghai Leading Academic Discipline Project (Project No. B506, 863 Program (Project No. 2007AA06Z331). Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the view of the supporting organizations. The authors are grateful to Yaling Wang for advice and troubleshooting the experimental apparatus and sample analysis.

语种：英文

外文关键词：Zero valent iron (ZVI); Permeable reactive barrier (PRB); Active carbon (AC); Dehalogenation; Chlorophenol; Adsorption

摘要：Granular activated carbon was modified with dimethyl dichlorosilane to improve its surface hydrophobicity, and therefore to improve the performance of permeable reactive barrier constructed with the modified granular activated carbon and elemental iron. X-ray photoelectron spectroscopy shows that the surface silicon concentration of the modified granular activated carbon is higher than that of the original one, leading to the increased surface hydrophobicity. Although the specific surface area decreased from 895 to 835 m(2) g(-1), the modified granular activated carbon could adsorb 20% more 2,4-dichlorophenol than the original one did in water. It is also proven that the permeable reactive barrier with the modified granular activated carbon is more efficient at 2,4-dichlorophenol dechlorination, in which process 2,4-dichlorophenol is transformed to 2-chlorophenol or 4-chlorophenol then to phenol, or to phenol directly. (C) 2010 Elsevier B.V. All rights reserved.