Removal of heavy metals from aqueous phases using chemically modified waste Lyocell fiber

John Kwame Bediako; Wei Wei; Sok Kim; Yeoung-Sang Yun

doi:10.1016/j.jhazmat.2015.07.033

Removal of heavy metals from aqueous phases using chemically modified waste Lyocell fiber

J Hazard Mater. 2015 Dec 15:299:550-61. doi: 10.1016/j.jhazmat.2015.07.033. Epub 2015 Jul 18.

Authors

John Kwame Bediako¹, Wei Wei¹, Sok Kim¹, Yeoung-Sang Yun²

Affiliations

¹ Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea.
² Division of Semiconductor and Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea. Electronic address: ysyun@jbnu.ac.kr.

PMID: 26257295
DOI: 10.1016/j.jhazmat.2015.07.033

Abstract

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 Pb(II), 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.

Keywords: Cellulose xanthation; Characterization; Complexation; Heavy metal; Ion exchange; Precipitation.

Publication types

Research Support, Non-U.S. Gov't