ADSORPTION-ASSISTED ELECTROCOAGULATION OF REAL CAR WASH WASTEWATER WITH EQUILIBRIUM AND KINETIC STUDIESHUMBERTO RUBÍ-JUÁREZ, CARLOS BARRERA-DÍAZ AND FERNANDO UREÑA-NUÑEZAbstract The oily matter elimination from car wash wastewater through an electro coagulation process followed by adsorption and simultaneous electro coagulation-adsorption were evaluated. COD removal was 78, 71 and 76% using aluminum, zinc and copper electrodes, respectively, while the Turbidity reached 92, 78 and 90% after 60 minutes of electro coagulation. After adsorption with Commercial GAC using a dose of 22.5 g/L, percentages of 99, 97 and 98% were reached, respectively. The coupling between electrocoagulation and GAC at concentrations of 7.5, 15 and 22.5 g/L allowed COD to decrease to 86, 91 and 94% and turbidity to 96, 97 and 98% using aluminum electrodes. The order in which the models best fitted the data was: Jovanovic>Langmuir>Freundlich>Temkin for adsorption isotherms and pseudo second order>Avrami-Erofeev>Elovich>pseudo first order>intraparticle diffusion for adsorption kinetics. Finally, the parameters in treated water were lower than limits set by the Mexican official standard, even enabling water reuse for washing of automobilesÂ’ chassis.
Enter your contact information below to receive full paper.
|