The highly effective removal of Cs+ by low turbidity chitosan-grafted magnetic bentonite

•Color, turbidity, and the effect of competitive cation are investigated.•Simulated groundwater and real seawater were compared.•CS-g-MB shows good magnetic property, excellent clarity and large adsorption capacity.•We give the method to enhance coagulation of material for adsorption. Chitosan-graft...

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Bibliographic Details
Published in:Journal of hazardous materials 2016-01, Vol.301, p.8-16
Main Authors: Yang, Shubin, Okada, Naoya, Nagatsu, Masaaki
Format: Article
Language:English
Subjects:
Adsorption
Bentonite
Bentonite - chemistry
Cesium - chemistry
Cesium ion
Chitosan
Chitosan - chemistry
Groundwater - chemistry
Magnetic Phenomena
Nephelometry and Turbidimetry
Seawater
Seawater - chemistry
Waste Disposal, Fluid - methods
Water Pollutants, Chemical - chemistry
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Summary:•Color, turbidity, and the effect of competitive cation are investigated.•Simulated groundwater and real seawater were compared.•CS-g-MB shows good magnetic property, excellent clarity and large adsorption capacity.•We give the method to enhance coagulation of material for adsorption. Chitosan-grafted magnetic bentonite (CS-g-MB) was successfully synthesized via a plasma-induced method. The CS-g-MB composite shows good magnetic properties, low turbidity, and high stability in aqueous solution and exhibits significant adsorption capacity for Cs+ ions. The adsorption of Cs+ by CS-g-MB is dependent on both pH and ionic strength. In the presence of Mg2+, K+, Li+, and Na+ ions, the Cs+ exchange is constrained in the order of Li+≈Mg2+
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2015.08.033