冶炼渣堆周边土壤砷锑垂向迁移分布及影响因素
Vertical distribution and influencing factors of arsenic-antimony pollution in soil around smelting slag area
向超 1王媛媛 1曾嘉庆 1姜苹红 2朱锋 1朱轩郅 1江钧 1薛生国1
作者信息
- 1. 中南大学 冶金与环境学院,长沙 410083
- 2. 湖南省环境科学研究院,长沙 410014
- 折叠
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.
Abstract
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.
关键词
冶炼场地/土壤污染/砷/锑/赋存形态Key words
smelting site/soil pollution/arsenic/antimony/occurrence form引用本文复制引用
基金项目
湖南省创新研究群体项目(2024JJ1012)
国家重点研发计划(2019YFC1803600)
湖南省优秀青年项目(2024JJ4061)
Science Fund for Creative Research Groups of Hunan Province,China()
国家重点研发计划()
Science Foundation for Outstanding Youth Scholars of Hunan Province,China()
出版年
2024
NETL
NSTL
万方数据