湖南某铅锌矿污染土壤稳定化修复研究
发布时间：2018-12-24 16:13
【摘要】：使用海泡石、磷酸二氢钙、钙镁磷肥、氧化钙和氧化镁等土壤改良剂及其组合,对湖南省某铅锌矿冶炼厂附近的重金属污染土壤进行了稳定化修复试验,利用BCR连续提取法进行形态分析,并进行稳定化效果的评价。结果表明,各改良剂组合均能够有效改变土壤中Zn、Cd和Pb的形态分布,弱酸提取态含量的减少率分别为Zn:17.03%~83.13%,Cd:45.03%~99.17%,Pb:54.05%~99.44%,降低重金属的不稳定形态和生物可利用性,稳定化效果显著。改良剂对Zn元素的稳定化效果影响程度为:钙镁磷肥+氧化钙钙镁磷肥+氧化镁钙镁磷肥海泡石+磷酸二氢钙海泡石;对Cd元素的稳定化效果影响程度为:钙镁磷肥+氧化钙钙镁磷肥+氧化镁钙镁磷肥海泡石+磷酸二氢钙海泡石;对Pb元素的稳定化效果影响程度为:海泡石+磷酸二氢钙钙镁磷肥+氧化镁钙镁磷肥+氧化钙钙镁磷肥海泡石。该复合污染土壤中,Zn、Cd、Pb稳定效果最优处理为10%钙镁磷肥+5%氧化钙组合。
[Abstract]:Using sepiolite, calcium dihydrogen phosphate, calcium magnesium phosphate, calcium oxide and magnesium oxide as soil modifiers and their combinations, the stabilization and remediation experiments of heavy metal contaminated soil near a lead and zinc mine smelter in Hunan Province were carried out. BCR continuous extraction method was used to analyze the morphology and evaluate the stabilization effect. The results showed that each modifier combination could effectively change the speciation distribution of Zn,Cd and Pb in soil, and the reduction rate of the content of weak acid extract was Zn:17.03%~83.13%,Cd:45.03%~99.17%, respectively. Pb:54.05%~99.44%, reduced the unstable morphology and bioavailability of heavy metals, and the stabilization effect was remarkable. The effect of the modifier on the stabilization of Zn elements is as follows: calcium magnesium phosphate sepiolite dihydrogen calcium phosphate sepiolite; The stabilization effect of Cd is as follows: calcium magnesium phosphate sepiolite dihydrogen calcium phosphate sepiolite; The effect of stabilization on Pb element is as follows: sepiolite phosphate dihydrogen calcium magnesium phosphate magnesium calcium magnesium phosphate sepiolite. The optimal stabilization effect of Zn,Cd,Pb was 10% calcium magnesia phosphate fertilizer 5% calcium oxide combination.
【作者单位】： 轻工业环境保护研究所/工业场地污染与修复北京市重点实验室;海口市土地整治重大工程领导小组;山西农业大学林学院;北京市南水北调团城湖管理处;
【基金】：海南省海口市南渡江流域土地整治重大工程科研项目:底泥应用试验示范工程监测与应用效果评价 2014年北京市科学技术研究院“科技萌芽计划” 2015年轻工业环境保护研究所“公益院所改革与发展专项” 北京市科学技术研究院青年骨干计划:Pb、Cd复合污染土壤稳定剂优选及稳定化条件研究
【分类号】：X753;X53
本文编号：2390815
[Abstract]:Using sepiolite, calcium dihydrogen phosphate, calcium magnesium phosphate, calcium oxide and magnesium oxide as soil modifiers and their combinations, the stabilization and remediation experiments of heavy metal contaminated soil near a lead and zinc mine smelter in Hunan Province were carried out. BCR continuous extraction method was used to analyze the morphology and evaluate the stabilization effect. The results showed that each modifier combination could effectively change the speciation distribution of Zn,Cd and Pb in soil, and the reduction rate of the content of weak acid extract was Zn:17.03%~83.13%,Cd:45.03%~99.17%, respectively. Pb:54.05%~99.44%, reduced the unstable morphology and bioavailability of heavy metals, and the stabilization effect was remarkable. The effect of the modifier on the stabilization of Zn elements is as follows: calcium magnesium phosphate sepiolite dihydrogen calcium phosphate sepiolite; The stabilization effect of Cd is as follows: calcium magnesium phosphate sepiolite dihydrogen calcium phosphate sepiolite; The effect of stabilization on Pb element is as follows: sepiolite phosphate dihydrogen calcium magnesium phosphate magnesium calcium magnesium phosphate sepiolite. The optimal stabilization effect of Zn,Cd,Pb was 10% calcium magnesia phosphate fertilizer 5% calcium oxide combination.
【作者单位】： 轻工业环境保护研究所/工业场地污染与修复北京市重点实验室;海口市土地整治重大工程领导小组;山西农业大学林学院;北京市南水北调团城湖管理处;
【基金】：海南省海口市南渡江流域土地整治重大工程科研项目:底泥应用试验示范工程监测与应用效果评价 2014年北京市科学技术研究院“科技萌芽计划” 2015年轻工业环境保护研究所“公益院所改革与发展专项” 北京市科学技术研究院青年骨干计划:Pb、Cd复合污染土壤稳定剂优选及稳定化条件研究
【分类号】：X753;X53
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