IA-HBP对铅锌尾矿区土样重金属污染控制的影响  

Effects of IA-HBP for Soil Heavy Metal Pollution Control in Lead Zinc Tailings Area

作　　者：龚伟 任赫赢[1,2] 孙可盈 陆盈 常亮亮 李美兰[1,2,3] 刘白玲 GONG Wei;REN Heying;SUN Keying;LU Ying;CHANG Liangliang;LI Meilan;LIU Bailing(Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,China;Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo University,Shangluo 726000,China;Chengdu Institute of Organic Chemistry,Chinese Academy of Sciences,Chengdu 610041,China)

机构地区：[1]商洛学院,陕西省尾矿资源综合利用重点实验室,陕西商洛726000 [2]商洛学院,陕西省矿产资源清洁高效转化与新材料工程研究中心,陕西商洛726000 [3]中国科学院成都有机化学研究所,四川成都610041

出　　处：《环境科学与技术》2025年第3期105-114,共10页Environmental Science & Technology

基　　金：陕西省自然科学基金面上项目(2023-JC-YB-108);陕西省教育厅重点项目(22JS013);商洛市科学技术研究发展项目(2021-Z-0001);省级大学生创新创业计划项目(S202311396056)。

摘　　要：该文以衣康酸、三乙醇及乙二甲酸为原料成功合成衣康酸型超支化聚合物(IA-HBP),并将其用于铅锌矿区土样中重金属的去除,研究发现土样中Pb、Cd、Zn均能高效地被IA-HBP淋洗去除,且在t=140 min、施用浓度为3%、pH=4.0及固液比=1∶15时,IA-HBP对Pb、Cd、Zn的去除率分别为73.6%、78.6%和58.8%。土柱淋洗实验证明,IA-HBP适用于高浓度Pb污染土样的淋洗修复。相比于对照组而言,IA-HBP淋洗可提高土样的有机质含量和颗粒尺寸,降低重金属的生态毒性,为植物及微生物生长提供更有利的环境,但随着IA-HBP的添加,IA-HBP分子结构中的羧基释放出大量的H+,表明IA-HBP淋洗过程易发生土样酸化问题。综合考虑,结合IA-HBP的使用浓度对铅锌尾矿区土样重金属含量控制及植物、微生物生长情况来看,IA-HBP可应用于铅锌库区污染土样的生态修复。The itaconic acid hyperbranched polymer(IA-HBP)was successfully synthesized using itaconic acid,triethanol,and ethylenedicarboxylic acid.And then the IA-HBP was used to leach the soil of lead-zinc mining areas.Static leaching ex⁃periments showed that the IA-HBP had excellent removal effects on Pb,Cd,and Zn in the soil.Moreover,when the leaching time was 140 min,the application concentration was 3%,pH 4.0,and the solid-liquid ratio was 1∶15,the removal rates of Pb,Cd,and Zn were 73.6%,78.6%,and 58.8%,respectively.In addition,the soil column leaching experiment proved that IA-HBP was suitable for leaching and remediation of high concentration Pb contaminated soil samples.Compared to the control group,the IA-HBP leaching could increase the organic matter content and particle size of soil,reduce the ecological toxicity of heavy metals,which could provide a more favorable environment for plant and microbial growth.However,with the addition of IA-HBP,the carboxyl groups of IA-HBP molecular structure could release a large amount of H+,indicating that soil acidifi⁃cation was prone to occur during the IA-HBP leaching process.Overall,based on the control of heavy metal content and the growth of plants and microorganisms in soil samples from lead-zinc tailings areas using IA-HBP concentration,IA-HBP could be applied for ecological restoration of polluted soil samples in lead-zinc tailings areas.

关 键 词：衣康酸 超支化淋洗剂 重金属 污染控制 淋洗 

分 类 号：X53[环境科学与工程—环境工程]