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苯和甲苯在土壤中的吸附行为研究 被引量:8

Sorption behaviors of benzene and toluene to soils
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摘要 选取某采油厂不同有机碳含量的表层土壤作为吸附剂,采用批实验方法对原油中代表性组分苯和甲苯的单组分吸附和双组分竞争吸附行为进行了研究。研究表明,单组分溶液中,苯和甲苯在土壤中的吸附符合线性规律,吸附能力与土壤有机碳含量成正比;双组分溶液中,苯和甲苯共存时存在竞争吸附,土壤对它们的吸附小于单组分时的情况。竞争吸附的结果说明,除分配吸附以外,介质表面点位对苯和甲苯的吸附也起着重要的作用。 The sorption of components of crude oil to soils affects their transport and transformation.In this study,batch experiments were carried out to investigate the sorption and competitive sorption of benzene and toluene to soils with different amounts of organic carbon.The results of single-solute solution experiments showed that the sorption of single compound to soils could be described by a linear sorption isotherm,and the sorption capacity was proportional to the soil organic carbon content.In bi-solute solution experiments,competitive sorption of solutes was observed,which caused a decrease of sorption capacity of target compound in comparison with single-solute cases.In addition to partition process,the competitive sorption results indicated that the specific sites probably played an important role in the sorption of organic compounds on the solid surface.
出处 《岩石矿物学杂志》 CAS CSCD 北大核心 2011年第6期1105-1110,共6页 Acta Petrologica et Mineralogica
基金 国家自然科学基金项目(40972161) 国家国际科技合作项目(2010DFA92800)
关键词 甲苯 吸附 竞争吸附 土壤 benzene toluene sorption competitive sorption soil
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