مرکز منطقه ای اطلاع رساني علوم و فناوري -

چكيده لاتين :

This study evaluates the effectiveness ofadsorption process by Granular Activated Carbon (GAC) compared with a novel formulation of coagulation - floccu lat ion process for dye removal from textile wastewater. In this regard, acidic, reactive, disperse and direct red dye are used to prepare the synthetic dye. Dominant wave length for each dye is determined by spectroph otometeric method. Using GAC as adsorbent, equilibrium time and adsorption isotherm ofeach dye are determined with aid ofspectrophotometric method. The results show that GAC can not remove dispersed red dye. Acidic red, direct red and reactive red of5 mgIL concentration are removed by GAC up to %90, %88 and %43 in 30, 60 and 120 min . (equilibrium time) respectively. Dyes of50 mglLconcentration are removed up to %93, %30 and %51 in 15,90 and 150 min. respectively. Adsorption obeysFreun dlich isotherm for acidic red, BET isotherm for direct red and Langmuir isotherm for reactive red. This investigation presents a novel formulation of coagulation - flocculation for color removal from textile dye soluti ons and illustrates its efficiency. Novel formulation of coagulation - flocculation remove direct red, reactive red and disperse red of5 mgIL concentration respectively up to %93, %91.3 and %57.1. Also the mentioned dyes of50 mgIL are removed respectively up to %90.8, %91.9 and %70. 1.