农业环境科学学报2017，Vol.36Issue(10)：2121-2128,8.DOI:10.11654/jaes.2017-0545
有机酸对猪粪中重金属的浸提
Removal of heavy metals from pig manure by organic acids
摘要
Abstract
The aim of this study was to investigate the effects of four organic acids,including citric acid,oxalic acid,tartaric acid,and malate,on heavy metals(Cu,Zn,and Mn) removal from pig manure by chemical extraction.The pig manure used in this experiment was obtained from a livestock farm in Tianjin.The treatment cost associated with the use of organic acids and use value of pig manure after extraction were also analyzed.The results showed that citric acid and oxalic acid had better leaching efficiency for heavy metals.Under optimum operation conditions,the removal efficiencies of Cu,Zn,and Mn reached 57.90％,73.76％,and 79.56％,respectively,using citric acid and 62.72％,59.39％,and 40.04％,respectively,using oxalic acid.The extracted Zn and Mn were primarily derived from carbonate and the Fe-Mn oxide and organic fractions,whereas Cu was primarily derived from organic fractions.The treatment cost of heavy metals increased as the solid-liquid ratio decreased,reaching RMB 126.07 and 384.24 yuan per ton using citric acid and oxalic acid,respectively,when the solid-liquid ratio was 1∶5.The contents of organic matter,nitrogen,phosphorus and potassium in treated pig manure were about 815.80,17.61,5.49and 0.36 g·kg-1 respectively.In general,citric acid and oxalic acid could remove heavy metals from pig manure effectively,and the pig manure after leaching had high nutrient content and fertility.关键词
猪粪/重金属/有机酸/形态/养分Key words
pig manure/heavy metal/organic acid/speciation/fertility分类
资源环境引用本文复制引用
杜丽琼,刘东方,黄文力,魏孝承,杨丹..有机酸对猪粪中重金属的浸提[J].农业环境科学学报,2017,36(10):2121-2128,8.基金项目
国家重点基础研究发展计划项目(2016YFD0801002-01) （2016YFD0801002-01）
天津市科技支撑计划项目(201601190)The National Basic Research Program of China(2016YFD0801002-01) （201601190）
The Science and Technology Support Program of Tianjin,China (201601190) （201601190）
