Catalytic dechlorination of polychlorinated biphenyls in soil by palladium-iron bimetallic catalyst

被引：50

作者：

He, Na ^{[1
,2
]}

Li, Peijun ^{[1
]}

Zhou, Yuncheng ^{[3
]}

Ren, Wanxia ^{[1
,2
]}

Fan, Shuxiu ^{[1
,2
]}

Verkhozina, V. A. ^{[4
]}

机构：

[1] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[3] Shenyang Agr Univ, Coll Informat & Elect Engn, Shenyang 110161, Peoples R China

[4] Russian Acad Sci, AP Vinogradova Siberian Branch, Inst Geochem, Irkutsk 664033, Russia

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 164卷 / 01期

基金：

国家高技术研究发展计划(863计划);

关键词：

2,2 ',4,5,5 '-Pentachlorobiphenyl; Dechlorination; Pd/Fe bimetal; Catalytic reduction; Soil remediation; ZERO-VALENT IRON; ZEROVALENT IRON; REDUCTIVE DECHLORINATION; SUBCRITICAL WATER; NANOSCALE PD/FE; KINETICS; SYSTEM; PCBS; HYDRODECHLORINATION; 2,4-DICHLOROPHENOL;

D O I：

10.1016/j.jhazmat.2008.07.149

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Pd/Fe bimetallic particles were synthesized by chemical deposition and used to dechlorinate 2,2',4,5,5'-pentachlorobiphenyl in soil. Batch experiments demonstrated that the Pd/Fe bimetallic particles could effectively dechlorinate 2,2',4,5,5'-pentachlorobiphenyl. Dechlorination was affected by several factors such as reaction time, Pd loading, the amount of Pd/Fe used, initial soil pH, and 2.2',4,5,5'-pentachlorobiphenyl concentration. The results showed that higher Pd loading, higher dosage of Pd/Fe, lower initial concentration of 2,2',4,5,5'-pentachlorobiphenyl and slightly acid condition were beneficial to the catalytic dechlorination of 2,2',4.5.5'-pentachlorobiphenyl. The degradation of 2,2',4.5,5'-pentachlorobiphenyl, catalyzed by Pd/Fe followed pseudo-first-order kinetics. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：126 / 132

页数：7

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