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ABSTRACT
The production of activated carbon from low or zero cost of agricultural by-products orwastes has received great attention from academics and practitioners due to its economic and environmental benefits. Activated Carbon (Adsorbent) was produced from sawdust by carbonizing at temperature of 400oC for 1 hour and thereafter activated with chemical reagent using Zinc chloride (ZnCl2). Salinity was treated below the acceptable limits (33–35 mg/L) of no risk for all biological activities in the marine ecosystems using the produced activated carbon. The effects of adsorbent dose and contact time on reduction of salinity of a Beverage industry effluent were evaluated, and kinetic models were studied in details and used to model the adsorption kinetics of salinity on an activated carbon. Kinetics parameters: rate constants, coefficients of diffusion, and maximum salinity adsorption were determined. The effluent was treated with the adsorbent by varying two variables: adsorbent dosage (2–20 g) and contact time (10–60) min. The data are better simulated by the linear models in the order: Pseudo second order > Intraparticle diffusion > Lagergren pseudo first-order kinetics. The percentage reduction of salt was positively influenced by adsorbent dose and contact time. The kinetics of salinity adsorption by the activated carbon is best described by the Pseudo second order kinetics equation: 𝑡= 1 + 1 𝑡. 𝑞𝑡 ℎ 𝑞.
