作　　者： ; ; ; (朱文萍）;

机构地区： 广州大学环境科学与工程学院

出　　处： 《环境化学》 2010年第3期402-406,共5页

摘　　要： 实验研究了8个不同浓度萘和菲在土壤中竞争吸附的行为.研究结果表明萘和菲在相互竞争下,表现出与单一纯溶质吸附时不同的吸附行为.随着双溶质竞争体系中的菲或萘浓度的增加,萘和菲的吸附等温线的线性程度都不断升高,吸附量不断下降.体积大、疏水性更强的菲比体积小、疏水性较小的萘具有更强的竞争吸附能力. Competitive adsorption,which is still not well studied,commonly exists in the natural system.In this paper,Binary Competitive sorption equilibria were measured in 8 concentration levels of phenanthrene or naphthalene.Results indicate that the adsorption behavior of phenanthrene or naphthalene on the same sorbent with competing solute is distinctly different from its single adsorption behaviors.The isotherms of naphthalene and phenanthrene become more linear and the capacity of the isotherm becomes lower as a function of the competing solute concentrations.It appears that the large-size and more hydrophobic phenanthrene competes favorably with the small-size and relatively less hydrophobic naphthalene.

关 键 词： 竞争吸附 疏水有机污染物 土壤

领　　域： [理学] [理学]