Journal
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
Volume 89, Issue -, Pages 95-104Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jtice.2018.04.021
Keywords
Corn stalk fiber; ATRP; PDMAEMA; Cr(VI) adsorption; Antioxidation
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Funding
- National Key R&D Program of China [2017YFB0310805]
- Funding of Engineering Research Center of Nano-Geo Materials of Ministry of Education, China University of Geosciences [NGM2017KF006]
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Hexavalent chromium (Cr(VI)) is a highly toxic pollutant which widely exists in industrial wastewater. Here, an adsorbent, corn stalk fibers (CSF) grafted poly(dimethylaminoethyl methacrylate) (PDMAEMA), was prepared via atom transfer radical polymerization (ATRP). Polyvinyl alcohol (PVA) was used to enrich the hydroxyl groups of CSF, thus increasing PDMAEMA grafting density. Compared with the general grafting, the adsorption capacity of high-density grafting CSF increased from 56 to 145 mg/g. The PDMAEMA chains stretched in the water like brushes, resulting in very fast adsorption rate-about 10 min to achieve adsorption equilibrium. The adsorbent was stable and would not be oxidized by Cr(VI), and the adsorption performance was still excellent after 20 cycles. (C) 2018 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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