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Start Over Author "Men, Jinfeng" Journal journal of radioanalytical and nuclear chemistry
4 results on '"Men, Jinfeng"'

3. Preparation of potassium niobium sulfide and its selective adsorption properties for Sr2+ and Co2+

Author

Men Jinfeng, Du Zhihui, Wang Xiaowei, Hao Ding, Chengqiang Liang, and Jia Mingchun

Subjects
inorganic chemicals, chemistry.chemical_classification, Sulfide, Health, Toxicology and Mutagenesis, Potassium, Diffusion, Inorganic chemistry, Public Health, Environmental and Occupational Health, chemistry.chemical_element, Pollution, Analytical Chemistry, Metal, Adsorption, Nuclear Energy and Engineering, chemistry, Selective adsorption, visual_art, Monolayer, visual_art.visual_art_medium, Radiology, Nuclear Medicine and imaging, Cobalt, Spectroscopy
Abstract

A novel metal sulfide: potassium niobium sulfide (KNbS) was prepared by hydrothermal method. The morphology and composition of KNbS were characterized by scanning electron microscopy and X-ray diffraction. It was confirmed that the adsorption process of KNbS was carried out by exchange reaction of K+ with Co2+ and Sr2+. The effects of pH, contact time, coexisting ions and initial concentration of strontium and cobalt on the adsorption of Sr2+ and Co2+ by KNbS were studied by static adsorption experiments. Thus, the optimal adsorption conditions of KNbS for Co2+ and Sr2+ were determined. The results show that KNbS has a greater affinity for Sr2+ and Co2+ than other coexisting ions. In addition, the adsorption mechanism was analyzed by kinetic, Weber–Morris, Boyd and isothermal models. It was revealed that the adsorption of Co2+ and Sr2+ by KNbS was chemical adsorption of monolayer and the intraparticle diffusion was the main rate-control step.

Published
2019
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