摘要
位点能量分布理论(Site energy distribution theory,SEDT)是一种从能量的角度去研究吸附机理的理论方法,它可以提供吸附剂表面位点的吸附能量以及对应的分布函数.因此SEDT在吸附能不均匀的吸附剂表面上的应用有着独特的优势.该理论在化学化工领域的吸附剂材料上有着广泛的应用,尤其是在碳材料上有着较为深入的研究.土壤和沉积物是环境中重要的天然吸附剂,有着比碳材料表面更复杂的特性,因此已有研究将SEDT用于土壤和沉积物对污染物的吸附过程中.然而现有的研究在污染物对象的选取以及该理论的应用方式上存在一定的局限性.鉴于SEDT在土壤和沉积物上的应用潜能及重要意义,本文详细地介绍了SEDT的主要内容,并综述了SEDT在国内外吸附领域的应用研究进展,旨在将化学化工领域已有的SEDT应用与讨论方式迁移到环境领域中,最后对SEDT在土壤和沉积物上更深入的应用以及SEDT自身的发展提出了展望.
Site energy distribution theory（ SEDT） is a method for studying the mechanism of adsorption processes from the energy perspective. It can provide the adsorption energy and the corresponding distribution function. Therefore,the application of SEDT on the adsorbent which contain heterogeneous adsorption energy on the surface has distinctly unique advantages. The theory has been widely used in the adsorption of materials in chemistry and chemical engineering field,especially concerning carbon materials. As important natural adsorbents in the environment,the surfaces of soils and sediments are more complex compared with the carbon materials. Thus,SEDT has been used to study the adsorption processes of contaminants on soils and sediments. However,the existing research is limited in terms of the types of pollutants and the application mode of the theory. In other words,SEDT still has great application prospect in soils and sediments. Considering the potential application and significance of SEDT in soils and sediments, the current paper discusses the main contents of SEDT,the methods for obtaining the site energy distribution curves and the characteristic parameters of these curves. Furthermore,it also summarizes the application and research process of SEDT in adsorption field with the intensiton of transferring the existing application and research methods of SEDT in the chemical field to the environmental field. According to the above,this paper brought forward the further research subjects of applying SEDT to soils and sediments and the own development of this theory in the end.
作者
黄丽敏
靳强
杨斌
朱学远
HUANG Limin;JIN Qiang;YANG Bin;ZHU Xueyuan(School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, Chin)
出处
《环境化学》
CAS
CSCD
北大核心
2017年第11期2424-2433,共10页
Environmental Chemistry
基金
国家自然科学基金(21476139)
国家水体污染控制与治理科技重大专项(2014ZX07204-008)
上海交通大学PRP项目(T160PRP31010)资助~~
关键词
位点能量分布理论
土壤
沉积物
吸附
不均匀性
site energy distribution theory, soil, sediment, adsorption, heterogeneity.
