CAJ | 학술논문

采用静态实验方法研究了Mn2+在三种黄土性土壤中的吸附动力学和热力学行为。结果表明,黄土性土壤对Mn2+的吸附在90 min内就可达到吸附平衡,对吸附动力学实验数据用吸附动力学模型进行拟合,发现三种黄土性土壤对Mn2+的吸附,都符合Elovich和双常数方程。 Mn2+在黄土性土壤中吸附热力学曲线可用Langmuir方程和Freundich方程描述,Freundich等温方程的拟合常数1/n<1,说明吸附过程是优惠吸附；吸附符合Langmuir方程,说明Mn( II)在黄土性土壤中的吸附为单分子层吸附(主要为离子交换作用)。还考察了Na+、Ca2+、Cd2+对黄土性土壤吸附Mn2+的影响,发现Na+对吸附的影响较小,Ca2+、Cd2+使Mn2+在黄土性土壤中的吸附量减小。
채용정태실험방법연구료Mn2+재삼충황토성토양중적흡부동역학화열역학행위。결과표명,황토성토양대Mn2+적흡부재90 min내취가체도흡부평형,대흡부동역학실험수거용흡부동역학모형진행의합,발현삼충황토성토양대Mn2+적흡부,도부합Elovich화쌍상수방정。 Mn2+재황토성토양중흡부열역학곡선가용Langmuir방정화Freundich방정묘술,Freundich등온방정적의합상수1/n<1,설명흡부과정시우혜흡부；흡부부합Langmuir방정,설명Mn( II)재황토성토양중적흡부위단분자층흡부(주요위리자교환작용)。환고찰료Na+、Ca2+、Cd2+대황토성토양흡부Mn2+적영향,발현Na+대흡부적영향교소,Ca2+、Cd2+사Mn2+재황토성토양중적흡부량감소。
Studied the kinetics and thermodynamics Mn2+adsorption behavior of three loess soil used the static test methods. The result showed that the adsorption of Mn( II) on loess soil is a fast process and can reach equilibrium within 90 min. The adsorption kinetics of experimental data were fitted using adsorption kinetics model. Found three loess soil adsorption of Mn2+ are in line with the Elovich and double constant equation. The adsorption isotherm of Mn2+ in loess soil can be depicted with Freundlich equation and Langmuir equation. From the Freundlich isotherm fitting constants obtained can be seen,1/n < 1 indica-ting preferential adsorption. It meets the adsorption of Langmuir equation and means that Mn2+ adsorption on the soil surface is a single molecular layer ( ion exchange is the main adsorption mechanism) . And also examines the impact of Na+,Ca2+,Cd2+ on adsorption of Mn2+in the loess soil found that Na+has a small effect on the absorption and Ca2+,Cd2+ make Mn2+ decreases on the adsorption in loess soil.