Application of Light Expanded Clay Aggregate (LECA) as a Low cost and Green Sorbent for Removal of Acid Blue-193 from Aqueous Solutions: Thermodynamic, Isotherm, Kinetic, and Modeling Studies
Publish place: The first national conference on new achievements in chemistry and chemical engineering
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ACCE01_010
تاریخ نمایه سازی: 9 مرداد 1395
Abstract:
The feasibility of light expanded clay aggregate (LECA) was studied as a green and low cost sorbent for removing of Acid Blue-193 (AB193) dye from synthetic colored wastewater. The effect of operating parameters such as emperature, initial concentration, initial pH, and contact time was investigated. On the basis of batch test results, the optimum operating conditions were found to be pH of 1.5, temperature of 25oC, and in range of initial concentrations 50-1000 (mg/L). The isotherm equilibrium data were fitted well by Langmuir isotherm (qmax= 71.43 (mg/g)) at 15°C. The experimental data was fitted very well with the pseudo-second-order kinetic model. The data was followed the external diffusion model up to initial 40 min and then, by intra-particle diffusion model up to 60 min, whereas diffusion is not only the rate-controlling step. Thermodynamic studies proved that AB193 adsorption process was a spontaneous, feasible, exothermic, and random process with physical adsorption mechanism.
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Authors
Mona Nazary
Department of Chemical Engineering, Kermanshah University of Technology,Kermanshah, Iran
Peyman Moradi
Department of Chemical Engineering, Kermanshah University of Technology,Kermanshah, Iran
Tahereh Shojaeimehr
Biotechnology Res. Lab., Chem. Eng. Dept., Razi Univ., Kermanshah
Ghazal Pourghazi
Department of Chemical Engineering, Kermanshah University of Technology,Kermanshah, Iran
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