COLOR AND COD REMOVAL FROM TREATED TEXTILE INDUSTRY EFFLUENTS WITH VARIOUS ADSORBENTS

Authors : Gül KAYKIOĞLU, Elçin GÜNEŞ, Yalçın GÜNEŞ, Suna Özden ÇELİK

Pages : 729-736

View : 35 | Download : 6

Publication Date : 2017-12-01

Article Type : Research Paper

Abstract :The rapid depletion and pollution of water resources are extremely negative impact on all life in Ergene River Basin in Turkey. The highly polluted sites were Corlu and Cerkezköy in the basin which located near the most urbanized and industrialized area. New discharge standards were developed by Turkish Water Pollution Control Regulation insert ignore into journalissuearticles values(TWPCR); for COD insert ignore into journalissuearticles values(chemical oxygen dimend); and color to prevent pollution caused by insufficient wastewater treatment in the basin. The aim of this study was to evaluate the color and COD removal efficiency of various adsorbents for biologically treated effluents of a local textile factory in Corlu which has COD:200 mg/L and color:39.4 m-1. In the study four adsorbents were used: the waste metal hydroxide insert ignore into journalissuearticles values(WMH); obtained from aluminum electroplating industry, colemanite waste insert ignore into journalissuearticles values(CW); and ulexite waste insert ignore into journalissuearticles values(UW); collected from boron ore wastes and magnetic nanoparticles insert ignore into journalissuearticles values(Fe3O4); insert ignore into journalissuearticles values(MNP);. The adsorption of color and COD onto different adsorbents were studied at natural pH insert ignore into journalissuearticles values(pH 7.5);, different adsorbent doses insert ignore into journalissuearticles values(2-30 g/L); and different contact times insert ignore into journalissuearticles values(0, 15, 30, 60, 90, 120, 150, 180 min);. The color removal efficiencies of WMH and UW were bigger than MNP and CW. Adsorption with UW achieved to equilibrium at 120 min and with WMH at 180 min. The maximum color removal efficiencies were 67% for UW and 57% for WMH. The maximum COD removal efficiencies were 72% for UW and 70% for WMH. Both adsorbents were reduced COD below 100 mg/L and color below 20 m-1. Freundlich model yielded better fit than the Langmuir model for the adsorption of color and COD on UW and WMH.
Keywords : Adsorption, waste metal hyroxide, ulexite waste, colemanite waste, magnetic nanoparticles

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