安全与环境工程2024，Vol.31Issue(5)：199-208,10.DOI:10.13578/j.cnki.issn.1671-1556.20230285
不同来源土壤有机质对苯的吸附/解吸特征及机制
Characteristics and mechanisms of benzene sorption/desorption by soil organic matter from different sources
摘要
Abstract
Organic matter is the key component influencing the environmental fate and risk of(benzene,toluene,ethylbenzene,and xylene)BTEX in soil and groundwater systems.In this study,three soil organic matters were selected as typical representatives to investigate the sorption and desorption characteristics of benzene under various environmental factors,and the mechanisms were analyzed and compared.The results indicate that the sorption capacity for benzene of black carbon(BC)prepared from two different biomass materials is sig-nificantly higher than that of humic acid(HA).The sorption of benzene on HA and BC is an exothermic and spontaneous physical process.Increased temperature and pH inhibits the sorption of benzene on organic matter,while increased ionic strength only inhibits the sorption process of BC.The sorption rate of benzene on BC is slower and the desorption hysteresis is stronger,which may be related to its rich pore structure.The sorption mechanisms of benzene on HA and BC include π-π EDA interactions between benzene ring and benzene and hy-drophobic partitioning of organic matter to benzene,where the interactions between BC and benzene are stronger.关键词
土壤有机质/苯/吸附/解吸特征/环境因素/吸附机制Key words
soil organic matter/benzene/sorption/desorption characteristic/environmental factor/sorption mechanism分类
资源环境引用本文复制引用
唐志,李义连,熊扬福,杨森,杜鹃..不同来源土壤有机质对苯的吸附/解吸特征及机制[J].安全与环境工程,2024,31(5):199-208,10.基金项目
国家自然科学基金面上项目(42077186) （42077186）
湖北省自然科学基金计划项目(2023AFD222) （2023AFD222）
湖北省地质局科技项目(KJ2023-30) （KJ2023-30）
湖北省地质局第六地质大队科技项目(DKJ2022-02) （DKJ2022-02）
