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Adsorption capability of heavy metals by chitosan/poly(ethylene oxide)/activated carbon electrospun nanofibrous membrane

机译:壳聚糖/聚(环氧乙烷)/活性炭电纺纳面纤维的重金属的吸附能力

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摘要

In this study, activated carbon (AC) was synthesized by chemical activation process from rice husk, with the BET surface area of 2180 m(2)/g. Chitosan/poly(ethylene oxide) (PEO)/AC nanofibrous membrane (CPANM) was synthesized by electrospinning process. The average fiber diameter was found to be 83 +/- 12.5 nm. Incorporation of AC lead to increase in the surface area of CPANM than chitosan/PEO fiber (CPF) by 371 m(2)/g. X-ray photoelectron spectroscopy survey and narrow scan analysis further proved the presence of AC in the membrane. CPANM showed higher adsorption capability than CPF. Analysis of the mechanism of heavy metals adsorption by CPANM and CPF hypothesized that, (NH2) is the only active group in CPF, whereas both (NH2) and (COOH) contributed in adsorption for CPANM. Maximum adsorption capacity of CPANM for Cr(VI), Fe(III), Cu(II), Zn(II), and Pb(II) ion was found to be 261.1, 217.4, 195.3, 186.2, and 176.9 mgg(-1) respectively. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45851.
机译:在该研究中,通过来自稻壳的化学活化过程合成活性炭(AC),BET表面积为2180m(2)/ g。通过静电纺丝工艺合成壳聚糖/聚(PEO)/ Ac纳米纤维膜(CPANM)。发现平均纤维直径为83 +/- 12.5nm。掺入AC导致CPANM的表面积增加而不是壳聚糖/ PEO纤维(CPF)371米(2)/ g。 X射线光电子体光谱测量和窄扫描分析进一步证明了膜中AC的存在。 CPANM显示比CPF更高的吸附能力。 CPANM和CPF假设重金属吸附机理分析,(NH2)是CPF中唯一的活性组,而(NH2)和(COOH)均为CPANM的吸附。 CR(VI),Fe(III),Cu(II),Zn(II)和Pb(II)离子的最大吸附能力为261.1,217.4,195.3,186.2和176.9 mgg(-1 ) 分别。 (c)2017 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2018,135,45851。

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