广西河池地区砒霜厂旧址污染土壤砷、锑稳定化研究  

Study on the Stabilization of Arsenic and Antimony in Contaminated Soil at the Old Site of Arsenic Plant in Hechi Area,Guangxi

作　　者：刘继东 龙吉生 LIU Jidong;LONG Jisheng(Shanghai SUS Restoration Co.Ltd.,Shanghai 201703;Shanghai SUS Environment Co.Ltd.,Shanghai 201703)

机构地区：[1]上海康恒环境修复有限公司,上海201703 [2]上海康恒环境股份有限公司,上海201703

出　　处：《环境卫生工程》2025年第2期64-70,76,共8页Environmental Sanitation Engineering

基　　金：国家重点研发计划项目(2020YFC1808000)。

摘　　要：土壤中的砷、锑因具有较强的迁移特性,其稳定化治理一直是土壤修复行业的难点。以广西河池地区7个砒霜厂旧址砷、锑污染土壤作为样本开展砷、锑稳定化效果试验,探究稳定化药剂对土壤pH,土壤中砷、锑浸出行为以及赋存形态的影响。结果表明:在稳定化材料投加量为10~70 g/kg的条件下,土壤样品的pH可维持在7.73~8.22;土壤中砷和锑的稳定效率分别为65.4%~100.0%和91.0%~99.7%;土壤中砷、锑赋存形态中占比最大的为残渣态,均超过70.0%,占比最小的为非专性吸附态(0~9.4%);土壤中砷、锑的稳定化过程也是非专性吸附态、专性吸附态、无定形铁铝氧化物结合态之间的转化过程。研究结果可为其他类似高浓度砷、锑污染土壤稳定化修复治理提供参考。Arsenic and antimony in soil have strong migration characteristics,their stabilization has always been a difficulty in the soil remediation industry.The stabilization effect experiment of arsenic and antimony was carried out in the arsenic and antimony contaminated soil at the former sites of seven arsenic plants in Hechi area,Guangxi.The effects of stabilizers on soil pH,arsenic and antimony leaching behavior and speciation in the soil were explored.The results showed that the soil pH remained in the range of 7.73 to 8.22 under the condition that the dosage of stabilized material was 10-70 g/kg.The stable efficiency of arsenic and antimony in soil was 65.4%-100.0%and 91.0%-99.7%,respectively.The largest proportion of arsenic and antimony in the soil was the residue state,which was more than 70.0%,and the smallest proportion was the non-obligate adsorption state(0-9.4%).The stabilization process of arsenic and antimony in soil is also a transformation process among non-obligate adsorption state,obligate adsorption state,and amorphous iron-aluminum oxide bound state.The results of this study can provide a reference for the stabilization and remediation of other similar highconcentration arsenic and antimony contaminated soils.

关 键 词：砒霜厂 污染土壤 砷 锑 浸出特性 赋存形态 

分 类 号：X53[环境科学与工程—环境工程]