Reductive dechlorination of polychlorinated dibenzo-p-dioxins by zerovalent iron in subcritical water

被引：52

作者：

Kluyev, N ^{[1
]}

Cheleptchikov, A ^{[1
]}

Brodsky, E ^{[1
]}

Soyfer, V ^{[1
]}

Zhilnikov, V ^{[1
]}

机构：

[1] RAS, Inst Ecol & Evolut, Moscow 117701, Russia

来源：

CHEMOSPHERE | 2002年 / 46卷 / 9-10期

关键词：

polychlorinated dibenzo-p-dioxin; zerovalent iron; reductive dechlorination; subcritical water;

D O I：

10.1016/S0045-6535(01)00276-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A new method for reductive dechlorination of polychlorinated dibenzo-p-dioxins (PCDDs) and remediation of contaminated soils is described that uses zerovalent iron as the dechlorination agent and subcritical water as reaction medium and extractive solvent. It is found that the zerovalent iron can be applied for stepwise dechlorination of octachlorinated dibenzo-p-dioxin (OCDD) on various matrixes in subcritical water, By using iron powder as matrix higher chlorinated congeners were practically completely reduced to less than tetra-substituted homologues. A significant part of residual OCDD, when it was spiked in to soils, and formed less chlorinated congeners are extracted with water in the given conditions. The solubility of OCDD was increased by a 4-6 orders over its solubility at ambient conditions. The new method of contentious-flow extraction is described. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1293 / 1296

页数：4

共 11 条

[1]

KUNCEVICH AD, 1996, USP KHIM, V65, P29

[2] Solubility of polycyclic aromatic hydrocarbons in subcritical water from 298 K to 498 K [J].