PAHs removal by soil washing with thiacalix[4]arene tetrasulfonate  

作　　者：Le-Yao Xing Guan-Han Meng Ji-Xian Yang Ming-Han Xu Yi-Ming Xu Hai-Xiao Xie Ai-Jie Wang Yi-Lu Sun 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin,150090,China [2]Key Laboratory of Environmental Biotechnology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China [3]Hangzhou Yanqu Information Technology Co.,Ltd.Y2,Hangzhou,310003,China

出　　处：《Environmental Science and Ecotechnology》2024年第5期256-267,共12页环境科学与生态技术（英文）

基　　金：support of the National Key Research and Development Program of China(Grant No.2019YFC1803804-02);the Open Project of the Key Laboratory of Environmental Biotechnology,CAS(Grant No.kf2021008).

摘　　要：Remediating soil contaminated with polycyclic aromatic hydrocarbons(PAHs)presents a significant environmental challenge due to their toxic and carcinogenic properties.Traditional PAHs remediation methodsdchemical,thermal,and bioremediationdalong with conventional soil-washing agents like surfactants and cyclodextrins face challenges of cost,ecological harm,and inefficiency.Here we show an effective and environmentally friendly calixarene derivative for PAHs removal through soil washing.Thiacalix[4]arene tetrasulfonate(TCAS)has a unique molecular structure of a sulfonate group and a sulfur atom,which enhances its solubility and facilitates selective binding with PAHs.It forms host-guest complexes with PAHs through p-p stacking,OH-p interactions,hydrogen bonding,van der Waals forces,and electrostatic interactions.These interactions enable partial encapsulation of PAH molecules,aiding their desorption from the soil matrix.Our results show that a 0.7%solution of TCAS can extract approximately 50%of PAHs from contaminated soil while preserving soil nutrients and minimizing adverse environmental effects.This research unveils the pioneering application of TCAS in removing PAHs from contaminated soil,marking a transformative advancement in resource-efficient and sustainable soil remediation strategies.

关 键 词：CALIXARENES Soil-washing Host-guest interaction PAHS 

分 类 号：X53[环境科学与工程—环境工程]