Efficient removal of polybrominated diphenyl ethers from soil washing effluent by dummy molecular imprinted adsorbents: Selectivity and mechanisms  

作　　者：Yao Ma Jinfan Chen Xiaodong Du Chunsheng Xie Jiangmin Zhou Xueqin Tao Zhi Dang Guining Lu 

机构地区：[1]School of Environment and Energy,South China University of Technology,Guangzhou 510006,China [2]Guangdong Provincial Key Laboratory of Environmental Health and Land Resource,Zhaoqing University,Zhaoqing 526061,China [3]College of Life and Environmental Sciences,Wenzhou University,Wenzhou 325035,China [4]College of Resources and Environment,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China [5]The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,Guangzhou 510006,China [6]Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling,South China University of Technology,Guangzhou 510006,China

出　　处：《Journal of Environmental Sciences》2023年第7期45-57,共13页环境科学学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.42077114 and 41771346);the Local Innovation and Entrepreneurship Team Project of Guangdong Special Support Program(No.2019BT02L218);Zhaoqing University Innovation Research Team Funding Project.

摘　　要：Surfactant enhanced elution is an effective method for removing hydrophobic organic pollutants from soils.The key to the development of leaching technology is selective removal of targeted pollutants in soil washing effluent and recycling of surfactant solutions.In this study,a molecular imprinting technique was applied to selectively sorb polybrominated diphenyl ethers(PBDEs)in soil washing effluent.The novel molecular imprinted polymers(MIPs)using different template molecules were synthesized by precipitation polymerization.Adsorption behaviors andmechanisms ofMIPs were studied through experiments and theoretical calculations.The results show that 4-bromo-4'-hydroxybiphenyl and toluene can be effective imprinting molecule for MIPs synthesis.The maximal adsorption capacity of selected dummy molecular imprinted polymer(D1-MIP)was 1032.36μmol/g,and that of part molecular imprinted polymer(P-MIP)was 981.13μmol/g.Their imprinting factors in 5 PBDEs adsorption ranged from 2.13 to 5.88,the recovery percentage of Triton X-100 can reach 99.09%,confirming the feasibility of reusing surfactant.Various PBDEs could be removed by MIPs,and Quantitative Structure Property Relationship analysis revealed that PBDEs’molecular volume,planarity,polarity,and hydrophobicity have major influences on their adsorption performance.DFT calculation revealed that Van derWaals force and hydrogen bonding played important roles during selective adsorption.These results can provide effective theoretical guidance for surfactant enhanced soil elution in practical engineering applications.

关 键 词：Molecular imprinting Selective adsorption Polybrominated diphenyl ethers Triton X-100 DFT calculation 

分 类 号：X53[环境科学与工程—环境工程]