赤泥、蚕沙、硫酸亚铁复配钝化剂对铅锌矿污染土壤的修复  

Remediation of Lead Zinc Mine Polluted Soil with Red Mud,Silkworm Sand,Ferrous Sulfate Passivating Agents

作　　者：吴昊 秦瑞 李杨 杨子杰 吴海霞 周浪 李科[3] WU Hao;QIN Rui;LI Yang;YANG Zi-jie;WU Hai-xia;ZHOU Lang;LI Ke(Scientific Research Academy of Guangxi Environmental Protection,Nanning 530022,China;College of Environment and Resources,Guangxi Normal University,Guilin 541006,China;College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]广西壮族自治区环境保护科学研究院,南宁530022 [2]广西师范大学环境与资源学院,桂林541006 [3]桂林理工大学土木与建筑工程学院,桂林541004

出　　处：《科学技术与工程》2024年第36期15725-15735,共11页Science Technology and Engineering

基　　金：国家重点研发计划(2018YFC1802604,2018YFC1802606)。

摘　　要：为了研究针对矿区开采过程中产生的废弃物导致的周边农田土壤及水源遭到重金属污染等问题,以广西桂林市阳朔县铅锌矿周边污染土壤为研究对象,采用室内土壤培养实验,添加不同比例赤泥、蚕沙和硫酸亚铁制备复配钝化剂,分析不同钝化剂及其投加量对于土壤中砷、铅、镉复合污染的影响,从而寻求适合的复配钝化剂。结果表明:不同比例赤泥、蚕沙和硫酸亚铁复配后可以不同程度改变污染土壤中砷铅镉3种重金属有效态含量和生物活性,其中以“0.2%蚕沙+0.8%硫酸亚铁”修复效果最佳,砷铅镉有效态分别下降70.08%、38.80%和1.49%,残余态砷铅镉分别上升66.67%、3.20%和10.00%。土壤pH与有效态砷和有效态铅呈极显著正相关(P<0.01),与有效态镉呈显著负相关(P<0.05);土壤有机质与有效砷呈极显著正相关。“0.2%蚕沙+0.8%硫酸亚铁”复合钝化剂对砷镉铅复合污染土壤重金属钝化效果最佳,本研究结果对矿山土壤治理中复合钝化材料的改良提供了数据支撑。In order to study the heavy metal pollution of the surrounding farmland soil and water sources caused by the waste generated during the mining process.The polluted soil around the lead-zinc mine in Yangshuo County,Guilin City,Guangxi Province was taken as research object.The indoor soil cultivation experiment was adopted.Compound passivators were prepared by adding different ratios of red mud,silkworm sand and ferrous sulfate to analyze the effects of different passivators and their dosages on the compound contamination of arsenic,lead and cadmium in the soil,so as to seek for a suitable compound passivator.The results show that different ratios of red mud,silkworm sand and ferrous sulfate can change the content of arsenic,lead and cadmium in the three heavy metals in the contaminated soil in different degrees and biological activity,of which 0.2%silkworm sand+0.8%ferrous sulfate have the best effect on the remediation of arsenic,lead and cadmium in the effective state are reduced by 70.08%,38.80%and 1.49%,respectively,and the residual state of arsenic,lead and cadmium increase by 66.67%,3.20%and 10%,respectively.Soil pH is highly significant positively correlated with effective state arsenic and effective state lead(P<0.01),and significantly negatively correlated with effective state cadmium(P<0.05).Soil organic matter wad highly significant positively correlated with effective arsenic.The composite passivation agent of 0.2%silkworm sand+0.8%ferrous sulfate have the best passivation effect on heavy metals in arsenic cadmium lead contaminated soil.The research results can provide data support for the improvement of composite passivation materials in mining soil treatment.

关 键 词：铅锌矿土壤 钝化剂 赤泥 蚕沙 硫酸亚铁 

分 类 号：X753[环境科学与工程—环境工程]