萘芘共存时有机酸对萘在土壤中的吸附影响

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英文篇名：The effects of organic acids on the adsorption of naphthalene in soil while pyrene and naphthalene coexisting 作者：龚香宜 ; 连婉 ; 熊武芳 ; 徐威 英文作者：GONG Xiang-yi;LIAN Wan;XIONG Wu-fang;XU Wei;College of Resources and Environmental Engineering,Wuhan University of Science and Technology; 关键词：土壤 ; 吸附 ; PAHs ; 有机酸 英文关键词：soil;;adsorption;;aromatic hydrocarbons;;organic acid 中文刊名：SXHG 英文刊名：Applied Chemical Industry 机构：武汉科技大学资源与环境工程学院; 出版日期：2019-02-10 出版单位：应用化工 年：2019 期：v.48;No.324 基金：国家自然科学基金项目(41102218) 语种：中文; 页：SXHG201902009 页数：5 CN：02 ISSN：61-1370/TQ 分类号：45-49

摘要

研究不同性质、不同来源(内源和外源)的有机酸对芘共存时萘在土壤中的吸附影响。结果显示,萘芘共存时,土壤中产生竞争吸附,使土壤对萘的吸附容量减少,但由于富里酸的分子量特性,增加了萘在富里酸内源土样的吸附量;萘芘共存时,外源有机酸的存在促进了土壤中萘的吸附,柠檬酸的促进作用强于富里酸。芘共存时浓度的增加,减少了原土对萘的吸附,减少量达到65.3%;增加了外源富里酸和柠檬酸土样中萘的吸附,增加量分别达到14.1%和6.7%。
        Fluvic acid and citric acid were chosen as typical organic acid,to analyze the various effect of different organic acid on the adsorption of the naphthalene with pyrene in the soil.The results show that when pyrene coexist,competitive adsorption occurred,inhibiting adsorption of naphthalene in soil,but because of the molecular properties of fluvic acid,soil samples with endogenous fluvic acid have an increase of adsorption of naphthalene.Exogenous organic acid can promote the adsorption of naphthalene in soil with pyrene coexist,citric acid promoted more strongly than fluvic acid,it caused by concomitant of pyrene and special function of citric acid.When pyrene coexist,with the increase of pyrene concentrations,the adsorption of naphthalene decrease at 65.3% in original soil,while the adsorption of naphthalene increase by 14.1% and 6.7% in soils with exogenous fluvic acid and citric acid.

引文

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