文章基本信息

标题：Regularities and Characterization of Arsenic Adsorption by Sediment in the Presence of Coexisting Ions
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作者：Song Gang-fu ; E. Zheng-yang ; Li Hai-hua 等
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2020
卷号：19
期号：2
页码：767-773
DOI：10.46488/NEPT.2020.v19i02.033
语种：English
出版社：Technoscience Publications
摘要：To reveal the regularity of arsenic adsorption of sediment, this study explores the law of arsenic adsorption by sediment when Fe 3+ and Mn 2+ coexist. The experimental results fit the first-order kinetic model and the second-order kinetic model. The surface physicochemical properties of sediment particles were analysed by scanning electron microscopy (SEM), nitrogen adsorption-desorption isotherm and fractal dimension. Characterization of surface area and pore distribution were measured by the BET equation and BJH equation. The results illustrate that the adsorption of arsenic by sediment shows the phenomenon of rapid adsorption in the early stage, slow adsorption in the middle stage and finally adsorption equilibrium. In the presence of coexisting ions, the BET specific surface area was as high as 20.14m 2 /g, the pore volume as 0.047826cm 3 /g, the surface pore volume as 43.25cm 3 , and the surface fractal dimension Ds as the largest.
关键词：Sediment;Arsenic;Adsorption;Kinetics;Surface characterization;Coexisting ions