摘要
选取某锑冶炼渣堆填埋管控区为研究对象,综合运用化学分析、吸附动力学模型、矿物分析技术等方法研究土壤砷锑迁移分布规律及其影响因素。结果表明:土壤中砷的污染高值点可渗透至2 m以下土层;锑的污染高值点则主要分布在表层土壤;土壤砷锑含量与非特异性吸附态、特异性吸附态、非结晶态铁/铝氧化物结合态及残渣态的分布格局具有显著相关性;污染物的迁移分布由土壤多个吸附阶段共同作用影响,这与土壤黏土矿物类型相关,铁铝矿物对砷锑的吸附配位起到关键作用。
An antimony smelting slag area was selected as the research area.Chemical analysis,adsorption kinetics model and mineral analysis techniques were used to investigate the migration and distribution of antimony and arsenic in soil and its influencing factors.The results show that the high pollution point of arsenic can penetrate to the soil layer below 2 m in depth,while the high pollution point of antimony mainly distributes in the surface soil.There are significant correlations among the contents of arsenic and antimony in soil and the distribution pattern of non-specific adsorption state,specific adsorption state,amorphous Fe/Al oxide binding state and residual state.The migration and distribution of pollutants are affected by the combined effects of multiple adsorption stages in soil,which is related to the types of soil clay minerals.Iron and aluminum minerals play a key role in the adsorption and immobilization of arsenic and antimony.
作者
向超
王媛媛
曾嘉庆
姜苹红
朱锋
朱轩郅
江钧
薛生国
XIANG Chao;WANG Yuanyuan;ZENG Jiaqing;JIANG Pinghong;ZHU Feng;ZHU Xuanzhi;JIANG Jun;XUE Shengguo(School of Metallurgy and Environment,Central South University,Changsha 410083,China;Hunan Provincial Academy of Environmental Science,Changsha 410014,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2024年第8期2773-2786,共14页
The Chinese Journal of Nonferrous Metals
基金
湖南省创新研究群体项目(2024JJ1012)
国家重点研发计划资助项目(2019YFC1803600)
湖南省优秀青年基金资助项目(2024JJ4061)。
关键词
冶炼场地
土壤污染
砷
锑
赋存形态
smelting site
soil pollution
arsenic
antimony
occurrence form
