摘要
为研究铅锌矿区土壤中重金属的稳定化方案,实地采集了四川省攀枝花市米易县某铅锌矿区污染土壤,采用稻壳、秸秆-木材和动物粪便3种不同来源的生物炭对土壤中弱酸提取态Pb、Zn、Cd、Cu和水溶态Zn进行了静态实验,并在此基础上选择动物粪便炭添加到污染土壤中进行了35 d的培育实验。结果表明:动物粪便炭对矿区污染土壤中弱酸提取态Zn、Cd、Pb、Cu稳定化性能最好,去除率分别为13.16%、15.68%、96.33%、65.39%,3种来源生物炭对水溶态Zn去除率均>90% 培育实验中施用30%动物粪便炭的土壤中弱酸提取态Pb降低了97.36%,水溶性Zn也得到了有效降低。因此动物粪便炭的施加可降低矿区污染土壤中重金属的迁移能力,对于铅锌矿区土壤重金属污染的防范与治理提供了参考。
To study the stabilization of heavy metals in soils of lead-zinc mining area,the contaminated soil of a lead-zinc mining area in Miyi County,Panzhihua,Sichuan Province was collected.First,biochar made from three different sources were used to conduct static experimental research on acid extractable lead,zinc,cadmium,copper and wate-soluble zinc.Then biochar made from animal manure was selected to add into the contaminated soil for 35 d incubation experiments.The results showed that biochar made from animal manure were effective for the stabilization of heavy metals in contaminated soil of lead-zine mining area.The removal rates of lead,zinc,cadmium,copper extracted from weak acid were 13.16%,15.68%,96.33%and 65.39%,respectively.The removal rates of soluble Zn stabilized by the three sources of biochar were all gained over 90%.In the incubation experiments,the acid extractable lead in the contaminated soil was decreased by 97.36%,and the wate-soluble zinc was also decreased significantly.Therefore,the application of animal manure biochar could reduce the migration capacity of heavy metals in polluted soils in mining areas,which provided a scientific basis for the prevention and treatment of heavy metals pollution in lead-zinc mining areas.
作者
罗唯叶
徐伟健
张志鹏
龚正君
王东梅
LUO Wei-ye;XU Wei-jian;ZHANG Zhi-peng;GONG Zheng-jun;WANG Dong-mei(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China;Chengdu Center of Hydrogeology and Engineering Geology,Sichuan Bureau of Geology&Mineral Resources,Chengdu 610081,China)
出处
《环境工程》
CAS
CSCD
北大核心
2020年第12期157-162,共6页
Environmental Engineering
基金
国家自然基金(21777131)
四川省重点研发项目(2018GZ0400)。
关键词
铅锌矿区
污染土壤
有效态重金属
稳定化
生物炭
lead-zinc mining areas
contaminated soils
available heavy metals
stabilization
biochar
