Enhanced chromium (VI) adsorption using nanosized chitosan fibers tailored by electrospinning

Lei Li; Yanxiang Li; Lixia Cao; Chuanfang Yang

doi:10.1016/j.carbpol.2015.02.037

Enhanced chromium (VI) adsorption using nanosized chitosan fibers tailored by electrospinning

Carbohydr Polym. 2015 Jul 10:125:206-13. doi: 10.1016/j.carbpol.2015.02.037. Epub 2015 Feb 26.

Authors

Lei Li¹, Yanxiang Li², Lixia Cao³, Chuanfang Yang⁴

Affiliations

¹ National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: lileilyq@outlook.com.
² National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: yxli@ipe.ac.cn.
³ National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: lxcao@ipe.ac.cn.
⁴ National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: cfyang@ipe.ac.cn.

PMID: 25857976
DOI: 10.1016/j.carbpol.2015.02.037

Abstract

Stacked chitosan nanofibers with an average diameter of 75 nm were successfully produced by electrospinning using 5 wt% chitosan in acetic acid as the spinning solution. The fibers were then cross-linked with glutaraldehyde to remove chromium [Cr(VI)] from water via static adsorption. It was found that the adsorption correlated well with pseudo-second order kinetic model, and followed a mixed isotherm of Freundlich and Langmuir. The maximum nanofibers adsorption capacity was 131.58 mg/g, more than doubled that of chitosan powders. Common co-ions such as Cl(-), NO3(-), Na(+), Ca(2+) and Mg(2+) had little or no effect on the adsorption but SO4(2-) was an exception. Fourier transform infrared spectroscopy and X-ray photoelectron spectrophotometer analyses indicated that both amino and hydroxyl groups of chitosan were engaged in the adsorption.

Keywords: Adsorption; Chitosan; Chromium (VI); Electrospinning; Nanofiber.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Absorption, Radiation
Chitosan / chemistry*
Chromium / chemistry*
Nanofibers / chemistry*

Substances

Chromium
Chitosan