EFFICIENT REMOVAL OF BASIC YELLOW 51 DYE VIA CARBONIZED PAPER MILL SLUDGE USING SULFURIC ACID

Authors : Ali YARAŞ, Hasan ARSLANOĞLU

Pages : 803-818

View : 39 | Download : 7

Publication Date : 2018-09-01

Article Type : Research Paper

Abstract :In present study, paper mill sludge insert ignore into journalissuearticles values(PMS); in cellulosic structure carbonized with sulfuric acid was utilized for adsorption of cationic basic yellow 51 insert ignore into journalissuearticles values(BY 51); dye from synthetic solution. The parameters affecting on removal of BY 51 dye following; initial pH insert ignore into journalissuearticles values(2-11);, amount of carbonized paper mill sludge insert ignore into journalissuearticles values(CPMS); insert ignore into journalissuearticles values(0.25-1.5 g/l);, initial concentration insert ignore into journalissuearticles values(0.5-2 mM);, time insert ignore into journalissuearticles values(0-360 min.); and temperature insert ignore into journalissuearticles values(25-55°C); were studied in the batch adsorption experiments. The physical and chemical properties of prepared CPMS were determined using elemental analyzes, scanning electron microscopy insert ignore into journalissuearticles values(SEM); and BET techniques. Optimum initial pH was measured to be 7 for the removal of BY 51 dye. The obtained equilibrium data in various initial concentrations of BY 51 dye solution varied from 0.5 to 2.5 mM for three temperatures insert ignore into journalissuearticles values(25°C, 40°C and 55°C); were applied to Langmuir and Freundlich isotherms. The calculated maximum adsorption capacity insert ignore into journalissuearticles values(qmax); from Langmuir equation was achieved 1089.45 mg/g depending on increasing temperature from 25oC to 55oC. The experimental results for all temperatures were applied to pseudo-first order kinetic model, pseudo-second order kinetic model and intra-particle diffusion model. Consequently, it was good agreement with the second-order kinetic model and the activation energy insert ignore into journalissuearticles values(Ea); is calculated as 11.642 kJ/mol. Thermodynamic parameters such as enthalpy insert ignore into journalissuearticles values(∆H°, +19.32 kJ/mol);, free energy insert ignore into journalissuearticles values(∆G°, -23.02 kJ/mol); and entropy insert ignore into journalissuearticles values(∆S°, 0.142 kJ/molK); were also calculated. The results showed that the adsorption phenomena of cationic BY 51 dye is of endothermic and spontaneous nature. The findings presented that CPMS could be utilized as adsorbent in the treatment of industrial wastewater.
Keywords : Paper mill sludge, basic yellow 51, carbonization, adsorption, isotherm, kinetic

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