自然科学版 英文版
自然科学版 英文版
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中南大学学报(英文版)

Journal of Central South University

Vol. 23    No. 2    February 2016

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Single-step synthesis of magnetic chitosan composites and application for chromate (Cr(VI)) removal
YANG Wei-chun(杨卫春)1, 2, TANG Qiong-zhi(唐琼芝)1, DONG Shu-yu(董舒宇)1, CHAI Li-yuan(柴立元)1, 2, WANG Hai-ying(王海鹰)1, 2

1. School of Metallurgy and Environment, Central South University, Changsha 410017, China;
2. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution,
Changsha 410017, China

Abstract:Magnetic chitosan composites (Fe3O4@chitosan) were synthesized in one single-step, characterized and applied in Cr(VI) removal from water. With the increase of loading proportion of chitosan, Cr(VI) adsorption capacity of Fe3O4@chitosan composites increased from 10.771 to 21.040 mg/g. The optimum adsorption capacities of Cr(VI) on Fe3O4@chitosan-3 were found in a pH range of 3.0-5.0. Kinetic study results show that the adsorption process follows pseudo-second-order model, indicating that the rate-limiting step in the adsorption of Cr(VI) involves chemisorptions. Moreover, FT-IR spectra analysis confirms that the amine and hydroxyl groups of chitosan are predominantly responsible for binding. Results from this work demonstrate that the prepared Fe3O4@chitosan composites possess great potential in Cr(VI) removal from contaminated water.

 

Key words: Cr(VI); magnetic chitosan; one single-step synthesis; adsorption

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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