Thiol-modified cellulose nanofibrous composite membranes for chromium (VI) and lead (II) adsorption

被引：253

作者：

Yang, Rui ^{[1
]}

Aubrecht, Katherine B. ^{[1
]}

Ma, Hongyang ^{[1
]}

Wang, Ran ^{[1
]}

Grubbs, Robert B. ^{[1
]}

Hsiao, Benjamin S. ^{[1
]}

Chu, Benjamin ^{[1
]}

机构：

[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

来源：

POLYMER | 2014年 / 55卷 / 05期

基金：

美国国家科学基金会;

关键词：

Cellulose nanofiber; Thiol-modification; Heavy metal ions removal; HIGHLY EFFECTIVE ADSORPTION; HEAVY-METAL IONS; TEMPO-MEDIATED OXIDATION; HEXAVALENT CHROMIUM; BACTERIAL CELLULOSE; AQUEOUS-SOLUTIONS; REMOVAL; PB(II); COMPLEXES; MECHANISM;

D O I：

10.1016/j.polymer.2014.01.043

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

Oxidized cellulose nanofibers (CNF), embedded in an electrospun polyacrylonitrile (PAN) nanofibrous scaffold, were grafted with cysteine to increase the adsorption capability for chromium (VI) and lead (II). Thiol-modified cellulose nanofibers (m-CNF) were characterized by titration, FT-IR, energy dispersive spectroscopy (EDS) and SEM techniques. Static and dynamic Cr(VI) and Pb(II) adsorption studies of mCNF nanofibrous composite membranes were carried out as a function of pH and of contact time. The results indicated these membranes exhibited high adsorption capacities for both Cr(VI) (87.5 mg/g) and Pb(II) (137.7 mg/g) due to the large surface area and high concentration of thiol groups (0.9 mmol of -SH/gram m-CNF). The morphology and property of m-CNF nanofibrous composite membranes was found to be stable, and they could be used and regenerated multiple times with high recovery efficiency. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：1167 / 1176

页数：10

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