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The produced water (PW) is generated as a byproduct of petroleum production, being an effluent of complex chemical composition. Several studies have been reported in the literatur e with rice husk ash application in adsorptive proces ses to remove toxic metals. Thus, this work aimed to evaluate the adsorption kinetics of Cu 2+ in rice husk ash (RHA) as adsorbent in aqueous medium. Adsorption test were conducted by b atch systems in predetermined conditions. To evaluate the kinetics of the adsorpt ive process, the pseudo-first order and pseudo-second order kinetic models were applied. Th e obtained results showed that CCA reached efficiency above 93% in the removal of Cu 2+ and as for the adsorption kinetics, both models adjusted to the experimental data, due high regression coefficients (R2 = 0.99). JC EC

CINÉTICA DE ADSORÇÃO DOS ÍONS DE Cu2+ NA CINZA DA CASCA DE ARROZ PARA TRATAMENTO DE EFLUENTE DA INDUSTRIA DE PETRÓLEO