期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 299, 期 -, 页码 550-561出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2015.07.033
关键词
Heavy metal; Cellulose xanthation; Characterization; Complexation; Precipitation; Ion exchange
资金
- Korean Government through NRF [2014R1A2A1A09007378]
- KEITI [EI-2012000150004]
In this study, an outstanding performance of chemically modified waste Lyocell for heavy metals treatment is reported. The sorbent, which was prepared by a simple and concise method, was able to bind heavy metals such as Pb(II), Cu(II) and Cd(II), with very high efficiencies. The binding mechanisms were studied through adsorption and standard characterization tests such as scanning electron microscopy, energy-dispersive spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction analyses. Adsorption kinetics was very fast and attained equilibrium within 5 min in all metals studied. The maximum single metal uptakes were 531.29 +/- 0.28 mg/g, 505.64 +/- 0.21 mg/g, and 123.08 +/- 0.26 mg/g for Cd(II) and Cu(II), respectively. In ternary metal systems, Cu(II) selectivity was observed and the underlying factors were discussed. The sorbent by its nature, could be very effective in treating large volumes of wastewater with the contact of very little amount. (C) 2015 Elsevier B.V. All rights reserved.
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