The study of Ni (II) removal from aqueous solution by modified sediment

International Symposium on Resource Exploration and Environmental Science

地球科学;生态环境科学

Yu, Shanshan^1 ; Cheng, Yang^2 ; Yang, Yuehong^1

Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming

650500, China^1

North Water Environment Engineering Co. Ltd., Haerbin

150000, China^2

关键词: Chemical adsorption;    Effect of adsorptions;    Endothermic process;    Equilibrium adsorption capacity;    Freundlich theories;    Pseudo first-order kinetics;    Pseudo second order kinetics;    Thermodynamic parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/64/1/012062/pdf
DOI  :  10.1088/1755-1315/64/1/012062

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Preparation of high-temperature roasting modified sediment as an adsorbent, to research the effect of adsorption of Ni (II) from aqueous solution through static adsorption test. Through static adsorption experiments, Adsorption kinetics and thermodynamics properties of roasting sediment adsorption of Ni2+were researched. It was observed that the adsorption process was described with the Langmuir and Freundlich theories, and the Freundlich model indicated the best fit to the adsorption process, showing that adsorption is between monolayer and multilayer. The adsorption of the Ni2 +onto the roasting sediment was described pseudo-first-order kinetics equation and pseudo-second-order kinetics equation, and the pseudo-second-order kinetics equation showed the best fit to the adsorption process, showing that it is dominated with chemical adsorption. Equilibrium adsorption capacity of roasting sediment for Ni2+was found to be 3.6563mg/g. Thermodynamic parameters indicated (ΔS. ΔH and ΔG)that the adsorption of the Ni2 +onto the roasting sediment is endothermic process.