文献类型：期刊文献

中文题名：活性炭对水中MTBE和BTEX的吸附性能

英文题名：Activated Carbon Adsorption for Removing MTBE and BTEX from Water

作者：李影[1];张巍[1];吕燕[1];林匡飞[1];应维琪[1]

机构：[1]华东理工大学资源与环境工程学院,上海200237

年份：2009

卷号：35

期号：6

起止页码：866

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：上海市重点学科建设项目(B506);国家"十五"高新技术发展计划(863计划)(2007AA06Z331)

语种：中文

中文关键词：活性炭;苯系物;甲基叔丁基醚;吸附性能;竞争吸附

外文关键词：activated carbon BTEX MTBE adsorption capacity competitive adsorption

摘要：研究了活性炭对汽油成分苯系物(BTEX)和甲基叔丁基醚(MTBE)的吸附规律。结果表明:活性炭对BTEX和MTBE的吸附能力大小顺序为:乙苯>邻二甲苯>甲苯>苯>MTBE,其次序与污染物在水中的溶解度大小成反比例关系;椰壳炭是所考察活性炭中吸附性能最好、最稳定的炭型;在选炭的过程中,苯酚值可以有效地表征活性炭对于低浓度BTEX和MTBE的吸附性能。当苯系物与MTBE共同存在时,活性炭对于MTBE的吸附容量明显降低,对于苯系物的吸附容量基本没有改变。共存化合物的初始浓度越高,其竞争吸附效应越明显;相比单一竞争化合物,BTEX的混合共存更显著地降低活性炭对于MTBE的吸附。当BTEX和MTBE共存时,吸附性能较好的BTEX会将已经吸附的MTBE从活性炭上置换下来,导致了出水MTBE浓度突然升高的现象。
Series of adsorption equilibrium capacity and breakthrough experiments were conducted to study the adsorption of gasoline constituents MTBE and BTEX（benzene,toluene,ethylbenzene and xylene） from single and mixed solute solutions on activated carbons.The adsorptive capacity of granular activated carbon（GAC） in declining order was ethylbenzene o-xylene toluene benzeneMTBE,consistent with the prediction based on their relative water solubility.The coconut carbon was most effective for removing MTBE and BTEX;the phenol number was a good indicator for the carbons′ adsorptive capacities for BTEX and MTBE at low equilibrium concentrations.When BTEX and MTBE were both present,the carbon′s capacity for MTBE was reduced while its capacity for BTEX remained nearly the same as that measured in the single solute solution.A higher concentration of co-existing toluene resulted in a greater reduction in carbon′s capacity for MTBE.The mixture of BTEX resulted in greater reduction of the capacity for MTBE than the sum of individual effects.When BTEX and MTBE were both present in the feed to a small absorber,the well adsorbed BTEX displaced some of the adsorbed MTBE resulting in a short period of higher than expected effluent MTBE concentration.