Enhanced removal of U(VI) from aqueous solution by chitosan-modified zeolite

A typical type of natural zeolite(Z) modified with chitosan was applied to remove U(VI) from aqueous solution. Batch experiments were performed to investigate effects of pH, initial U(VI) concentration and contact time. Results show that chitosan-modified zeolite (CZ) exhibited enhanced adsorption c...

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Veröffentlicht in:	Journal of radioanalytical and nuclear chemistry 2020-02, Vol.323 (2), p.1003-1012
Hauptverfasser:	Yang, Tianzi, Zhang, Weimin, Liu, Haiyan, Guo, Yadan
Format:	Artikel
Sprache:	eng
Schlagworte:	Adsorption Aqueous solutions Chemistry Chemistry and Materials Science Chemistry, Analytical Chemistry, Inorganic & Nuclear Chitosan Diagnostic Radiology Green technology Hadrons Heavy Ions Inorganic Chemistry Mineral industry Mining industry Nuclear Chemistry Nuclear energy Nuclear facilities Nuclear Physics Nuclear Science & Technology Physical Chemistry Physical Sciences Radioactive pollution Radioactive wastes Science & Technology Technology Uranium Wastewater Zeolites
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Beschreibung
Zusammenfassung:	A typical type of natural zeolite(Z) modified with chitosan was applied to remove U(VI) from aqueous solution. Batch experiments were performed to investigate effects of pH, initial U(VI) concentration and contact time. Results show that chitosan-modified zeolite (CZ) exhibited enhanced adsorption capacity for U(VI) and rapider adsorption kinetics than Z. The optimal pH ranges from 5 to 7. U(VI) adsorption data of Z and CZ could be described by pseudo-first order kinetic model and Langmuir isotherm model. Adsorption mechanism of U(VI) on Z and CZ was studied by means of SEM, XRD and FT-IR.
ISSN:	0236-5731 1588-2780
DOI:	10.1007/s10967-019-06993-w