Adsorption of Teztile Dye by Organo-Bentonite
Dye removal from industrial wastewater is applicable by adsorption techniques. Because of economic considerations, finding an alternative costeffective sorbent is important. Clays are inexpensive minerals and available in many countries. Bentonite is one type of clay which is hydrophilic and ineffective for organic pollutant removal. Bentonite has an exchangeable cation which can be substituted by cationic detergent. Modification of bentonite is a method to convert organophobic material to organophilic sorbent. In this study Bentonite was modified by Alkyl Dimethyl Benzyl Ammonium Chloride, (ADBAC) in order to obtain an alternative sorbent for dye removal from textile effluents. Two dyes using in textile industry were examined in this study. Aqueous solutions prepared from disperse blue 56 and pigment blue 60 were used and batch kinetic and isotherm experiments were carried out. Data were evaluated for applicability to the Langmuir and Freundlich isotherm models and the removal capacity of organo-bentonite was compared with that of ordinary bentonite. The adsorption was reached in equilibrium within 6h of contact time. Adsorption kinetics obeys a Pseudo-second order reaction. Adsorption isotherms were fitted with Langmuir and Freundlich models. Corresponding constants of both models were calculated. Adsorption efficiencies were increased with increasing the sorbents dose. Results indicated 85% and 78% removal of disperse blue and pigment blue respectively by organo-bentonite compared with a removal of 52 % and 45% achieved by ordinary bentonite. Adsorption capacity of bentonite for dye removal can be effectively increased by modification with commercial cationic detergent.
pigment blue disperse blue organo-bentonite adsorption isotherm teztile effluent
Ramazanali DIANATI TILAKI
Environmental health department,Mazandaran University of Medical Sciences,Faculty of Health Km 18 Khazar Abad road,Sari-IRAN
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
943-947
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）