赤泥、蚕沙、硫酸亚铁复配钝化剂对铅锌矿污染土壤的修复
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1.广西壮族自治区环境保护科学研究院;2.广西师范大学 环境与资源学院;3.桂林理工大学土木与建筑工程学院

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中图分类号:

X75

基金项目:

国家重点研发计划项目(2018YFC1802604,2018YFC1802606)


Remediation of Lead Zinc Mine Polluted Soil with Red Mud, Silkworm Sand, and Ferrous Sulfate Passivating Agents
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1.Scientific Research Academy of Guangxi Environmental Protection;2.China;3.College of environment and resources,Guangxi Normal University;4.Guangxi,China;5.College of Civil Engineering and Architecture,Guilin University of Technology

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    摘要:

    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 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%。土壤pH值与有效态砷和有效态铅呈极显著正相关(P<0.01,下同),与有效态镉呈显著负相关(P<0.05,下同);土壤有机质与有效砷呈极显著正相关。 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,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。

    Abstract:

    [ ] To address the heavy metal pollution of the surrounding farmland soil and water sources caused by the waste generated during the mining process, we took the polluted soil around the lead-zinc mine in Yangshuo County, Guilin City, Guangxi Province, as the research object, and used the indoor soil cultivation experiment to add different ratios of red mud, silkworm sand and ferrous sulfate to prepare a complex passivator, and analyzed the effects of different passivators and their dosage on the compound contamination of arsenic, lead, and cadmium in the soil to find a suitable complex passivator. The effects of different passivators and their dosages on the compound contamination of arsenic, lead and cadmium in soil were analyzed, so as to find the 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 has the best effect on the remediation of arsenic, lead and cadmium in the effective state were reduced by 70.08%, 38.80% and 1.49%, respectively, and the residual state of arsenic, lead and cadmium increased by 66.67%, 3.20% and 10%, respectively, 3.20% and 10% respectively. Soil pH was highly significant positively correlated with effective state arsenic and effective state lead (P<0.01, the same below), and significantly negatively correlated with effective state cadmium (P<0.05, the same below); soil organic matter was highly significant positively correlated with effective arsenic." 0.2% silkworm sand + 0.8% ferrous sulfate" composite passivator for arsenic, cadmium and lead composite contaminated soil heavy metal passivation effect is the best, the results of the study on the improvement of composite passivation materials in mine soil treatment provides data support.

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吴昊,秦瑞,李杨,等. 赤泥、蚕沙、硫酸亚铁复配钝化剂对铅锌矿污染土壤的修复[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-09-28
  • 最后修改日期:2024-05-29
  • 录用日期:2024-06-05
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