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端羧基超支化型淋洗剂对尾矿库区土壤重金属的淋洗效果

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龚伟, 屈娜娜, 李美兰, 张秦航, 麻森, 刘白玲. 端羧基超支化型淋洗剂对尾矿库区土壤重金属的淋洗效果[J]. 环境化学, 2020, (6): 1590-1596. doi: 10.7524/j.issn.0254-6108.2019041203
引用本文: 龚伟, 屈娜娜, 李美兰, 张秦航, 麻森, 刘白玲. 端羧基超支化型淋洗剂对尾矿库区土壤重金属的淋洗效果[J]. 环境化学, 2020, (6): 1590-1596. doi: 10.7524/j.issn.0254-6108.2019041203
shu
GONG Wei, QU Nana, LI Meilan, ZHANG Qinhang, MA Sen, LIU Bailing. Heavy metal removal from soil of mine tailings by a carboxyl-terminated hyperbranched washing agent[J]. Environmental Chemistry, 2020, (6): 1590-1596. doi: 10.7524/j.issn.0254-6108.2019041203
Citation: GONG Wei, QU Nana, LI Meilan, ZHANG Qinhang, MA Sen, LIU Bailing. Heavy metal removal from soil of mine tailings by a carboxyl-terminated hyperbranched washing agent[J]. Environmental Chemistry, 2020, (6): 1590-1596. doi: 10.7524/j.issn.0254-6108.2019041203
shu

端羧基超支化型淋洗剂对尾矿库区土壤重金属的淋洗效果

  • 1. 商洛学院/陕西省尾矿资源综合利用重点实验室, 商洛, 726000;

  • 2. 中国科学院成都有机化学研究所, 成都, 610041

    • 通讯作者: 李美兰, E-mail: liecho2009@163.com ; 
  • 基金项目:

    陕西省教育厅重点项目（18JS032），商洛市科技项目（SK2016-46）和商洛市科技项目（SK2016-47）资助.

Heavy metal removal from soil of mine tailings by a carboxyl-terminated hyperbranched washing agent

  • 1. Shangluo University/Key Laboratory of Comprehensive Utilization of Tailings Resources in Shaanxi Province, Shangluo, 726000, China;

  • 2. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041, China

    • Corresponding author: LI Meilan, liecho2009@163.com ; 
  • Fund Project: Supported by Key Projects of Shaanxi Education Department(18JS032), Shangluo Science and Technology Project(SK2016-46) and Shangluo Science and Technology Project(SK2016-47).

  • 摘要: 通过熔融聚合法，以三羟甲基丙烷为中心核，柠檬酸为共聚单体，成功制备了端羧基型超支化聚合物，并采用振荡淋洗法研究了所制备的超支化聚合物在不同因素影响下对尾矿库区污染土壤Cd、Pb和Zn的淋洗效果.实验结果表明，随着端羧基超支化型淋洗剂使用浓度的增加及淋洗时间的延长，HBP-COOH对Cd、Pb和Zn的去除率总体呈现增大趋势.在CHBP=1.0%，且pH=3时，HBP-COOH对Cd、Zn的去除率分别为73.2%和48.1%；在pH=5且CHBP=1.0%时，对Pb的去除率为69.2%，而且HBP-COOH对Cd的去除效果最佳.相比于柠檬酸而言，HBP-COOH对重金属具有更好的去除效果，且经HBP-COOH淋洗后，土壤的基本理化性质变化相对较小.综合考虑，HBP-COOH可以作为尾矿库区污染土壤Cd、Pb和Zn的环境友好型淋洗剂.
    Abstract: A carboxyl-terminated hyperbranched copolymer (HBP-COOH) was successfully prepared by melting polymerization with trimethylolpropane as the core and citric acid as monomer. Removal of Cd, Pb and Zn from the soil of mine tailings by HBP-COOH was investigated in batch experiments. The experimental results showed that the removal efficiency of Cd, Pb and Zn increased with increasing concentration of the washing agent and contact time. Moreover, under optimum operating conditions, the leaching efficiency of Cd, Pb and Zn was 73.2%, 69.2% and 48.1%, respectively. The removal efficiency of target heavy metals was in the order of Cd > Pb > Zn. Compared with citric acid, HBP-COOH had better leaching efficiency for heavy metals, and less effects on the basic physical and chemical properties of soil. Therefore, HBP-COOH could be used as an environmentally friendly agent for Cd, Pb and Zn contaminated soil remediation.
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  • 收稿日期:  2019-04-12
龚伟, 屈娜娜, 李美兰, 张秦航, 麻森, 刘白玲. 端羧基超支化型淋洗剂对尾矿库区土壤重金属的淋洗效果[J]. 环境化学, 2020, (6): 1590-1596. doi: 10.7524/j.issn.0254-6108.2019041203
引用本文: 龚伟, 屈娜娜, 李美兰, 张秦航, 麻森, 刘白玲. 端羧基超支化型淋洗剂对尾矿库区土壤重金属的淋洗效果[J]. 环境化学, 2020, (6): 1590-1596. doi: 10.7524/j.issn.0254-6108.2019041203
shu
GONG Wei, QU Nana, LI Meilan, ZHANG Qinhang, MA Sen, LIU Bailing. Heavy metal removal from soil of mine tailings by a carboxyl-terminated hyperbranched washing agent[J]. Environmental Chemistry, 2020, (6): 1590-1596. doi: 10.7524/j.issn.0254-6108.2019041203
Citation: GONG Wei, QU Nana, LI Meilan, ZHANG Qinhang, MA Sen, LIU Bailing. Heavy metal removal from soil of mine tailings by a carboxyl-terminated hyperbranched washing agent[J]. Environmental Chemistry, 2020, (6): 1590-1596. doi: 10.7524/j.issn.0254-6108.2019041203
shu

端羧基超支化型淋洗剂对尾矿库区土壤重金属的淋洗效果

    通讯作者: 李美兰, E-mail: liecho2009@163.com ; 
  • 1. 商洛学院/陕西省尾矿资源综合利用重点实验室, 商洛, 726000;
  • 2. 中国科学院成都有机化学研究所, 成都, 610041
  • 收稿日期:  2019-04-12
基金项目:

陕西省教育厅重点项目（18JS032），商洛市科技项目（SK2016-46）和商洛市科技项目（SK2016-47）资助.

摘要: 通过熔融聚合法，以三羟甲基丙烷为中心核，柠檬酸为共聚单体，成功制备了端羧基型超支化聚合物，并采用振荡淋洗法研究了所制备的超支化聚合物在不同因素影响下对尾矿库区污染土壤Cd、Pb和Zn的淋洗效果.实验结果表明，随着端羧基超支化型淋洗剂使用浓度的增加及淋洗时间的延长，HBP-COOH对Cd、Pb和Zn的去除率总体呈现增大趋势.在CHBP=1.0%，且pH=3时，HBP-COOH对Cd、Zn的去除率分别为73.2%和48.1%；在pH=5且CHBP=1.0%时，对Pb的去除率为69.2%，而且HBP-COOH对Cd的去除效果最佳.相比于柠檬酸而言，HBP-COOH对重金属具有更好的去除效果，且经HBP-COOH淋洗后，土壤的基本理化性质变化相对较小.综合考虑，HBP-COOH可以作为尾矿库区污染土壤Cd、Pb和Zn的环境友好型淋洗剂.

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