文章基本信息

标题：Adsorption of the reactive azo dyes onto NH4Cl-induced activated carbon
本地全文：下载
作者：Sakine Shekoohiyan ; Gholamreza Moussavi ; Samira Mojab 等
期刊名称：Environmental Health Engineering and Management
印刷版ISSN：2423-3765
电子版ISSN：2423-4311
出版年度：2016
卷号：3
期号：1
页码：1-7
语种：English
出版社：Kerman University of Medical Sciences
摘要：Background: The efficacy of NH4Cl-induced activated carbon (NAC) was examined in order to adsorb RR198,an azo reactive model dye,from an aqueous solution. Methods: The effects of pH (3 to 10),adsorbent dose (0.1 to 1.2 g/L),dye concentration and contact time on the adsorption efficiency were investigated. Results: The results showed that the removal of dye was highest at a solution pH of 7 and a powder dose of 1.1 g/L. The 85.9%,72.6% and 65.4% removal of RR198 was obtained for a concentration of 25,50 and 100 mg/L,respectively,at a relatively short contact time of 30 minutes,and at optimum pH and NAC concentrations of 1 g/L. The experimental data for kinetic analysis illustrated a best fit to the pseudo-second-order model. The study data on equilibrium were modeled using Langmuir,Freundlich and Dubinin–Radushkevich models;the Langmuir equation provided the best fit for the data. Conclusion: Therefore,the NAC appears to be an efficient and appropriate adsorbent for the removal of reactive azo dyes from waste streams..
关键词：Azo dye; Adsorption; Modified activated carbon; Equilibrium; Isotherm; Kinetic