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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 環境工程學系所 > 依資料類型分類 > 期刊論文 >  Adsorption of zinc(II) from water with purified carbon nanotubes

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/126117

標題: Adsorption of zinc(II) from water with purified carbon nanotubes
作者: Lu, Chungsying;Chiu, Huantsung
Contributors: 國立中興大學環境工程學系
National Chung Hsing University,Department of Environmenral Engineering
關鍵字: Carbon nanotubes;Adsorption;Zinc;pH effect;Powdered activated carbon
日期: 2006-2
Issue Date: 2012-10-19 16:06:07 (UTC+8)
Publisher: Elsevier+Ltd.
摘要: Commercial single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) were purified by sodium hypochlorite solutions and were employed as adsorbents to study the adsorption characteristics of zinc from water. The properties of CNTs such as purity, structure and nature of the surface were greatly improved after purification which made CNTs become more hydrophilic and suitable for adsorption of Zn2+. In general, the adsorption capacity of Zn2+ onto CNTs increased with the increase of pH in the pH range of 1-8, fluctuated very little and reached maximum in the pH range of 8-11 and decreased at a pH of 12. A comparative study on the adsorption of Zn2+ between CNTs and commercial powdered activated carbon (PAC) was also conducted. The maximum adsorption capacities of Zn2+ calculated by the Langmuir model are 43.66, 32.68, and 13.04 mg g−1 with SWCNTs, MWCNTs and PAC, respectively, at an initial Zn2+ concentration range of 10-80 mg l−1. The short contact time needed to reach equilibrium as well as the high adsorption capacity suggests that SWCNTs and MWCNTs possess highly potential applications for the removal of Zn2+ from water.
Relation: Chemical Engineering Science, Volume 61, Issue 4, Page(s) 1138-1145.
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