Enhanced chromium (VI) adsorption using nanosized chitosan fibers tailored by electrospinning
Enhanced chromium (VI) adsorption using nanosized chitosan fibers tailored by electrospinning
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使用通过静电纺丝定制的纳米级壳聚糖纤维增强铬 (VI) 吸附
DOI：
10.1016/j.carbpol.2015.02.037
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发表时间：
2015-07-10
影响因子：
11.2
通讯作者：
Yang, Chuanfang
中科院分区：
文献类型：
--
作者：
Li, Lei;Li, Yanxiang;Yang, Chuanfang
以质量分数为5%的壳聚糖醋酸溶液为纺丝液，采用静电纺丝法成功制备了平均直径为75 nm的堆叠型壳聚糖纳米纤维。然后将纤维与戊二醛交联以通过静态吸附从水中去除铬[Cr（VI）]。结果表明，吸附符合准二级动力学模型，吸附等温线符合Freundlich和Langmuir混合等温式。纳米纤维的最大吸附量为131.58mg/g，是壳聚糖粉末的两倍多。常见的共存离子如Cl-、NO3-、Na+、Ca 2+和Mg 2+对吸附的影响很小或没有影响，但SO 42-是个例外。傅立叶变换红外光谱和X射线光电子能谱分析表明，壳聚糖的氨基和羟基都参与了吸附。(C)2015爱思唯尔有限公司版权所有。
Stacked chitosan nanofibers with an average diameter of 75 nm were successfully produced by electro-spinning 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+, Ca2+ and Mg2+ had little or no effect on the adsorption but SO42- 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. (C) 2015 Elsevier Ltd. All rights reserved.