Hexachlorobenzene dechlorination as affected by nitrogen application in acidic paddy soil

被引：23

作者：

Liu, Cuiying ^{[1
]}

Jiang, Xin ^{[1
]}

Wang, Fang ^{[1
]}

Yang, Xinglun ^{[1
]}

Wang, Tao ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 179卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Hexachlorobenzene; Biodegradation; Nitrogen; Methane; Paddy soil; REDUCTIVE DECHLORINATION; CHLORINATED BENZENES; MICROBIAL ACTIVITY; METHANE PRODUCTION; RIVER SEDIMENT; ATRAZINE; BIODEGRADATION; BIOREMEDIATION; CULTURE; MINERALIZATION;

D O I：

10.1016/j.jhazmat.2010.03.059

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Batch incubation experiments were conducted to study the effects of different nitrogen (N) fertilizers (NH4HCO3. CO(NH2)(2), and NaNO3) on hexachlorobenzene (HCB) dechlorination in an acidic paddy soil. Results showed that NH4HCO3 and CO(NH2)(2) had similar effects on HCB dechlorination, and their application amount was a crucial factor on reductive dechlorination. The addition of a proper amount of 0.14 g NH4HCO3- or CO(NH2)(2)-N to 500 g soil promoted HCB dechlorination, however, the application of a high amount (0.84 g) of NH4HCO3- or CO(NH2)(2)-N inhibited HCB dechlorination. Additional NaNO3 served as an electron acceptor and led to lower soil pH, thus inhibited NCB dechlorination. Detected dechlorinated products showed that the dominant pathway of HCB dechlorination was HCB pentachlorobenzene (PeCB)-> 1,2,3,5-tetrachlorobenzene (TeCB) 1,3,5-trichlorobenzene (TCB), and PeCB was the main metabolite. The role of methanogenic bacteria in HCB dechlorination was uncertain and conditions-dependent. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.

引用

页码：709 / 714

页数：6

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