Electrochemically Enhanced Removal of Polycyclic Aromatic Basic Dyes from Dilute Aqueous Solutions by Activated Carbon Cloth Electrodes

被引：64

作者：

Bayram, Edip ^{[1
]}

Ayranci, Erol ^{[1
]}

机构：

[1] Akdeniz Univ, Dept Chem, TR-07058 Antalya, Turkey

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2010年 / 44卷 / 16期

关键词：

WASTE-WATER PURIFICATION; FELT ELECTRODES; ADSORPTION; ELECTROSORPTION; EQUILIBRIUM; IONS; AEROGEL;

D O I：

10.1021/es101177k

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Open-circuit (OC) adsorption and electrosorption behaviors of three polycyclic aromatic dyes from dilute aqueous solutions onto activated carbon cloth (ACC) were investigated. The selected dyes were crystal violet (BB-3), basic blue7 (BB-7), and basic blue11 (BB-11). OC adsorption and electrosorption processes were monitored by in situ UV-visible spectrophotometry. Electrosorption was carried out by polarization of an ACC electrode, galvanostatically Considerable enhancements in removal capacity and duration of the dyes were achieved upon polarization of ACC Kinetic data for OC adsorption and electrosorption were successfully treated according to pseudo-first-order law, and rate constants were determined. Adsorption isotherms were derived, and the data were treated according to Langmuir and Freundlich equations. Both the rate and extent of adsorption and electrosorption of dyes were found to increase in the order of BB-7 < BB-11 < BB-3. This order was discussed in terms of correlation between sizes of dye species and of ACC pores. Electrodesorption experiments were carried out to explore possibilities of regeneration of ACC

引用

页码：6331 / 6336

页数：6

共 24 条

[1] Investigation of removal of Cr(VI), Mo(VI), W(VI), V(IV), and V(V) oxy-ions from industrial waste-waters by adsorption and electrosorption at high-area carbon cloth [J].