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As and Cd Sorption on Selected Si-Rich Substances

文献类型： 外文期刊

作者： Peng, Hua 1 ; Ji, Xionghui 1 ; Wei, Wei 2 ; Bocharnikova, Elena 3 ; Matichenkov, Vladimir 3 ;

作者机构： 1.HAAS, Inst Agr Environm & Ecol, Changsha 410125, Hunan, Peoples R China

2.Hunan Univ, Longping Branch, Changsha, Hunan, Peoples R China

3.RAS, Inst Basic Biol Problems, Pushchino 149292, Russia

关键词： Arsenic;Cadmium;Monosilicic acid;Silicon;Sorption model

期刊名称：WATER AIR AND SOIL POLLUTION （ 影响因子：2.52； 五年影响因子：2.574 ）

ISSN： 0049-6979

年卷期： 2017 年 228 卷 8 期

页码：

收录情况： SCI

摘要： The processes of pollutant sorption by soil components control their mobility, migration, and transformation in the soil-plant system and depend on numerous properties, among which the elemental composition and surface area are dominant. In a laboratory experiment, the sorption of As and Cd by Si-rich substances differing in surface area, solubility of Si, and mineralogical composition was studied. The adsorption data were fitted to the linear, logarithmic, exponential, Langmuir, and Freundlich equations. Both size of the particles and mineral solubility of Si affected the As and Cd sorption. In the systems with lower initial concentrations of As and Cd, size of the particles had more pronounced effect on the sorption capacity. In the systems with high initial concentrations of As and Cd, the concentration of monosilicic acid was more significant than the surface area.

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