Jingru Ji, Weiyun Liang, Rongtao Yan, Jiaying Ji, Qin Zhang
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Role of ion exchange in the adsorption of Sr2+ by bentonite
This study investigated the adsorption behaviour of Sr2+ by GMZ bentonite, considering the effects of time and initial concentration, and quantified the ion exchange contribution. Results showed that Sr2+ adsorption reached equilibrium within 48 h. As the initial Sr2+ concentration increased, the adsorption capacity increased, whereas the adsorption rate declined. Meanwhile, the ion exchange adsorption capacity increased and reached a plateau at high concentrations, while the ion exchange adsorption ratio decreased from 95.7% to 68.8%. Sorption process is governed by ion exchange. As ion exchange sites saturate, multilayer adsorption occurs and surface or edge interactions become significant.
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An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.
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