Contrasting effects of composting and pyrolysis on bioavailability and speciation of Cu and Zn in pig manure

被引：111

作者：

Meng, Jun ^{[1
]}

Wang, Lu ^{[1
]}

Zhong, Libin ^{[1
]}

Liu, Xingmei ^{[1
]}

Brookes, Philip C. ^{[1
]}

Xu, Jianming ^{[1
]}

Chen, Hongjin ^{[2
]}

机构：

[1] Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, Inst Soil & Water Resources & Environm Sci, Hangzhou 310058, Zhejiang, Peoples R China

[2] Zhejiang Prov Agr Dept, Hangzhou 310028, Zhejiang, Peoples R China

来源：

CHEMOSPHERE | 2017年 / 180卷

基金：

中国国家自然科学基金;

关键词：

Composting; Pyrolysis; Pig manure; Biochar; Metal speciation; STABILIZED SEWAGE-SLUDGE; HEAVY-METAL CONTENTS; SWINE MANURE; DIFFERENT FEEDSTOCKS; COPPER; ZINC; BIOCHARS; TEMPERATURE; LIVESTOCK; POULTRY;

D O I：

10.1016/j.chemosphere.2017.04.009

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The intensive and unregulated application of feed additives to commercial pig foods has resulted in high levels of Cu and Zn in pig manure. The aim of this study was to assess the impacts of composting and pyrolysis processes on the bioavailability and chemical speciation of Cu and Zn in pig manure products by single and sequential extractions, and to compare metal bioavailability in composts and biochar-amended soils in incubation experiments. Composting and pyrolysis processes can convert exchangeable and carbonate-bound Cu and Zn to organic matter and residual fractions, and significantly reduce the potential availability of metals in composts and biochars. The DTPA-Cu and Zn concentrations in soils amended with biochar BC700 were lower than in composts and soils amended with biochar BC400. It is suggested that 700 degrees C is the preferred pyrolysis temperature for the conversion of pig manure contaminated with heavy metals to biochar, in order to minimize environmental pollution. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：93 / 99

页数：7

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