腐殖酸复配凹凸棒石对土壤Cd污染的钝化效果  

Stabiliation Efficiency of Cd in Soil Treated by Attalpulgite Complexed with Humic Acid

作　　者：任汉儒 任珺 陶玲[1,2,3] 汪淼 曲自超 王若安 任学昌 Ren Hanru;Ren Jun;Tao Ling;Wang Miao;Qu Zichao;Wang Ruoan;Ren Xuechang(Key laboratory of Yellow River Water Environment in Gansu Province,Lanzhou Jiaotong University,Lanzhou,Gansu 730070;Institute of Environmetal Ecology,School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou,Gansu 730070;Gansu Hanxing Environmental Protection Co.,Ltd.,Lanzhou,Gansu 730070)

机构地区：[1]兰州交通大学甘肃省黄河水环境重点实验室,甘肃兰州730070 [2]兰州交通大学环境与市政工程学院,环境生态研究所,甘肃兰州7300703 [3]甘肃瀚兴环保科技有限公司,甘肃兰州730070

出　　处：《非金属矿》2023年第4期67-71,共5页Non-Metallic Mines

基　　金：甘肃省黄河水环境重点实验室项目(20JR2RA002,21YRWEK007,21YRWEG003);甘肃省教育厅产业支撑计划项目(2021CYZC-31);甘肃省科技厅科技计划项目(22CX3GA076);兰州市人才创新创业项目(2021-RC-41);甘肃省优秀研究生创新之星项目(2023CXZX);兰州交通大学大学生科技创新项目(DXS2022-017)。

摘　　要：将凹凸棒石与腐殖酸结合制备新型钝化材料,并测试其对土壤重金属Cd的钝化效果。结果表明,腐殖酸复配凹凸棒石产生了新的活性官能团,增强了其对重金属的吸附作用。腐殖酸和凹凸棒石质量比为1∶5时,能够将土壤pH值和电导率分别提高至7.31和366.00μS/cm。土壤中重金属Cd的酸溶态含量较对照组降低34.10%;重金属Cd的还原态和残渣态较对照组分别升高21.09%和63.13%。不同配比的腐殖酸与凹凸棒石材料均能降低土壤中Cd的环境风险因子和潜在风险指数,其中当腐殖酸与凹凸棒石的质量比为1∶5时,降低效果显著。综合表明,腐殖酸复配凹凸棒石能够作为有效的钝化材料来修复土壤中的重金属Cd污染。A new passivation materials were carried out by attapulgite complexed with humic acid.The results showed that humic acid combined with attapulgite produced new active functional groups,which may enhance its adsorption of heavy metals.When the mass ratio of humic acid to attapulgite was 1∶5,the pH value and conductivity of soil could be significantly increased to 7.31 and 366.1μS/cm,respectively.The acid soluble content of heavy metal Cd in soil decreased by 34.10%compared with control group.The reduced and residual levels of heavy metal Cd were increased by 21.09%and 63.13%compared with the control group,respectively.Different proportions of humic acid and attapulgite materials could reduce the environmental risk factors and potential risk index of Cd in soil,and the effect was significant when the mass ratio of humic acid to attapulgite was 1∶5.Humic acid combined with attapulgite could be used as an effective passivation material to repair heavy metal Cd pollution in soil.

关 键 词：CD 凹凸棒石 腐殖酸 化学形态 环境风险 

分 类 号：TB332[一般工业技术—材料科学与工程] X53[环境科学与工程—环境工程]