Adsorption of Natural Organic Matter (NOM) by Powdered Activated Carbon: Application in Ardebil Water Treatment Plant

Batch experiments were conducted to determine the adsorption of natural organic matter (NOM) from the aqueous solution by powdered activated carbon (PAC). The percentage of NOM removal was measured at different pH values (5, 6, 7, 8 and 9), PAC doses (200, 400, 600, 800 and 1000 mg/L) and agitation rates (40, 80, 120, 160 and 200 rpm) according to Taguchi method. Results showed that the adsorption rate of the NOM increased by increasing the PAC dose and decreased by increasing the pH. The optimum removal was found 96.3 % in pH=6 and PAC dose=1000 (mg/lit), also this process was not depended on the agitation rate. The adsorption rate of NOM on the PAC at 25°C have been determined and pseudo second-order kinetic model revealed better fitting than first-order model.

کلیدواژه ها:

Adsorption ، NOM ، Powdered activated carbon ، Adsorption isotherms ، Adsorption kinetics