Koyuncu, Menderes2025-05-102025-05-1020120976-31042-s2.0-84866383645https://hdl.handle.net/20.500.14720/16872Cr(VI) chromium was removed from the artifical wastewater using natural bentonite in batch. The adsorption of the chromium on bentonite was investigated during a series of batch adsorption experiments carried out to determine the effect of three different temperatures and contact time. The amounts adsorbed at equilibrium were measured. The experimental results have been fitted both Langmuir and Freudlich isotherms. The maximum adsorption capacities of the bentonite were found to be 12.65, 10.99 and 9.50 mg/g bentonite at 25, 30 and 35 degrees C, respectively. Several thermodynamic parameters such as. Ho,. Go and. So have been calculated. The results of thermodynamic parameters indicates, spontaneous and an exothermic process. The results showed that bentonite could be used as effective adsorbent for the removal of Cr(VI). In addition, the color changes in the artificial wastewater were measured using colorimetric method. The color difference CIE L *a *b* values between before and after adsorption were determined.eninfo:eu-repo/semantics/closedAccessChrom DyesWaste WaterBentoniteThermodynamicsLangmuir ModelFreundlich ModelCie L* A* B* Colour Space SystemArticle33N/AN/A14WOS:000215234700001