期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 145, 期 -, 页码 1180-1188出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2019.10.044
关键词
Chitosan; Adsorption; Pharmaceutical and personal care products; Polyethylenimine modification
资金
- National Natural Science Foundation of China [21476212]
- Science and Technology department of Zhejiang Province [2018CO2038]
- Zhejiang Provincial Natural Science Foundation of China [LQ17C190002]
- Foundation of Bureau of Science and Technology of Zhoushan [2019C21023]
Diclofenac sodium (DS) is an emerging contaminant that is toxic and remains at high concentrations in natural aquatic environments. The aim of this study was to fabricate a novel spherical polymeric adsorbent composed of cross-linked chitosan beads grafted by polyethylenimine (PEI) to remove DS from water. The adsorbents were thoroughly characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, elemental analyses, and X-ray photoelectron spectroscopy. A cross-linking step was expected to enhance adsorption. The experimental data obtained from a series of adsorption experiments were fit well by the Langmuir isotherm model and pseudo-second-order model. The epichlorohydrin-PEI adsorbent (EPCS@PEI) showed a maximum adsorption capacity of 253.32 mg/g and removal efficiency of nearly 100% for the DS in the initial 50 mg/L solution. Therefore, EPCS@PEI is proposed as a potential adsorbent for DS removal, where these initial findings are expected to promote further design and fabrication of effective adsorbents for practical applications. (C) 2019 Elsevier B.V. All rights reserved.
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