TY - JOUR AU - Hussain Majeed Flayeh PY - 2017/10/24 Y2 - 2024/03/29 TI - Biosorption of Reactive Azo Dye from synthetic wastewater using low cost Dead Sludge Biomass JF - Association of Arab Universities Journal of Engineering Sciences JA - ASSOC ARA UNIV J ENG SCI VL - 24 IS - 1 SE - Articles DO - UR - https://jaaru.org/index.php/auisseng/article/view/24 AB - Reactive azo dye biosorption behavior on dead sludge biomass was studied by sets of the equilibrium and time-based experiments under several conditions. Experimental data were estimated to find out kinetic characteristics. Biosorption process were found to follow the pseudo second-order kinetic model equation. Biosorption isotherm connect well with the Langmuir and Freundlich isotherm model and the maximum sorption capacity of dye estimated is 62.89 mg/g. Thermodynamic parameters were calculated based on Van't Hoff equation. The average change of standard enthalpy was -25.89 kJ/mol. Negative and values indicate the adsorption process for dye onto the studied dead biomass is exothermic and spontaneous. The average change of entropy was -64.52 J/mol.K also negative, which suggests a decrease in the freedom of the system. Equilibrium constant was estimated from Langmuir and Freundlich isotherm model constants ER -