Effects of exogenous silicon on the adsorption kinetics characteristics of arsenic in soils of acidic paddy fields in northeast china

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Yang, Dan^1 ; Wang, Yayun^1 ; Yang, Tianyu^1 ; Guo, Lei^1 ; He, Na^1

College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning

110866, China^1

关键词: Absorption process;    Adsorption characteristic;    Adsorption equilibria;    Adsorption kinetics;    Adsorption process;    Arsenic adsorption;    Different treatments;    Equation parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/2/012065/pdf
DOI  :  10.1088/1755-1315/295/2/012065

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

To explore the effects of exogenous silicon on the adsorption characteristics of arsenic in paddy field soils, the impacts of silicon on adsorption kinetic characteristics of arsenic in the acidic paddy field soil in northern China were studied under neutralizing alkaline of Sodium Silicate and balancing Na+ of different treatments. The results indicated that silicon reduced the adsorption amount of arsenic in soils and shortened the adsorption equilibrium time. The adsorption process of arsenic in the soil could be well described by Elovich equation. Silicon increased the equation parameters α and β values, which indicated that exogenous silicon could accelerate the initial arsenic adsorption rate in soils and reduce the reaction rate during the absorption process.