Equilibrium uptake and sorption dynamics for the removal of a basic dye (basic red) using low-cost adsorbents

被引:354
作者
Gupta, VK [1 ]
Ali, I
Suhas
Mohan, D
机构
[1] Indian Inst Technol, Dept Chem, Roorkee 247667, Uttaranchal, India
[2] Natl Inst Hydrol, Roorkee 247667, Uttaranchal, India
[3] Ind Toxicol Res Ctr, Environm Chem Div, Lucknow 226001, Uttar Pradesh, India
关键词
adsorption; activated carbon; blast furnace slag; carbonaceous material; solid waste utilization; dye removal; wastewater treatment;
D O I
10.1016/S0021-9797(03)00467-3
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Waste carbon slurries (generated in fertilizer plants) and blast furnace slag (generated in steel plants) have been converted into low-cost potential adsorbents. The adsorbents have been characterized and tried for the removal of the dye basic red from wastewater. Studies were performed at different pH to find the pH at which maximum adsorption occurs. Equilibrium isotherms were determined to assess the maximum adsorption capacity of the adsorbents. Adsorption capacities are compared for activated carbon developed from fertilizer waste and activated slag developed from blast furnace waste. The adsorption data are correlated with Freundlich and Langmuir isotherms in each system. The kinetics of adsorption depends on the adsorbate concentration and the physical and chemical characteristics of the adsorbent. Studies were conducted to delineate the effect of pH, temperature, initial absorbate concentration, particle size of the adsorbent, and solid-to-liquid ratio. The adsorption of basic red was found to be endothermic and first-order in nature. (C) 2003 Elsevier Inc. All rights reserved.
引用
收藏
页码:257 / 264
页数:8
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