期刊
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
卷 3, 期 3, 页码 M1-M9出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.004403jss
关键词
-
资金
- National Science Foundation-Nanoscale Interdisciplinary Research Team and Materials Processing and Manufacturing [CMMI 10-30755]
- Lamar University
- Texas Hazardous Waste Research Center (THWRC)
- Directorate For Engineering [1030755] Funding Source: National Science Foundation
The synergistic interactions between the activated carbon fabrics (ACFs) and the toxic Cr(VI) were investigated aiming to functionalize the ACFs and to remove the toxic Cr(VI). The effects of pH, treatment time, initial Cr(VI) concentration and ACFs dose on the Cr(VI) removal were studied. Different pH values had different effects on the Cr(VI) removal by ACFs, pH = 1.0 was found to be the optimum. For the pH = 1.0 solution, the Cr(VI) in the aqueous solution was reduced to Cr(III) and adsorbed onto the ACFs, and the C-O and C=O functional groups were found on the ACFs surface. The redox kinetic in the pH = 1.0 solution could be described by the pseudo-first-order model and the typical value of the pseudo-first-order rate constant was calculated to be 0.0872 min(-1). Langmuir, Freundlich, and Temkin adsorption isotherm models were applied to describe isotherm behaviors. The Cr(VI) equilibrium data agreed well with the Langmiur isotherm model with a maximum adsorption capacity of 5.59 mg g(-1). The ACFs could be easily regenerated by 1.0 mol L-1 sodium hydroxide and effectively recycled 7 times with the removal percentage decreased by 16.5%, which was caused by the irreversible formation of oxygen functional groups on the surface of ACFs. (C) 2013 The Electrochemical Society.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据