Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/68247
標題: Removal of hexavalent Cr by coconut coir and derived chars - The effect of surface functionality
作者: Shen, Y.S.
Wang, S.L.
Tzou, Y.M.
Yan, Y.Y.
Kuan, W.H.
關鍵字: Hexavalent chromium
Biochar
Coconut coir
Surface functionality
Water
treatment
activated carbons
waste-water
chromium
mechanism
cr(vi)
reduction
biomaterials
environment
adsorbents
adsorption
期刊/報告no:: Bioresource Technology, Volume 104, Page(s) 165-172.
摘要: The Cr(VI) removal by coconut coir (CC) and chars obtained at various pyrolysis temperatures were evaluated. Increasing the pyrolysis temperature resulted in an increased surface area of the chars, while the corresponding content of oxygen-containing functional groups of the chars decreased. The Cr(VI) removal by CC and CC-derived chars was primarily attributed to the reduction of Cr(VI) to Cr(III) by the materials and the extent and rate of the Cr(VI) reduction were determined by the oxygen-containing functional groups in the materials. The contribution of pure Cr(VI) adsorption to the overall Cr(VI) removal became relatively significant for the chars obtained at higher temperatures. Accordingly, to develop a cost-effective method for removing Cr(VI) from water, the original CC is more advantageous than the carbonaceous counterparts because no pyrolysis is required for the application and CC has a higher content of functional groups for reducing Cr(VI) to less toxic Cr(III). (C) 2011 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/68247
ISSN: 0960-8524
文章連結: http://dx.doi.org/10.1016/j.biortech.2011.10.096
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