Özet:

In this study, Cu(II) removal with three different types of clinoptilolite, which is natural (H-Zt), chemically conditioned (KOH-Zt), and loaded with Fe3O4 magnetic nanoparticles after chemical conditioning (KOH-Zt/Fe3O4), was investigated depending on concentration and pH in the first step. Then, the studies were continued with the adsorbent KOH-Zt with the best efficiency, and the effects of contact time, initial metal concentration, adsorbent dosage, and temperature were investigated. It was observed that chemical conditioning with KOH was more effective in removing Cu(II) and 77.61% removal was achieved at 30 mg/L Cu(II) concentration. Maximum Cu(II) adsorption capacity is 8.91 mg/g at 50 mg/L Cu(II) concentration. It was understood that the Langmuir isotherm model best describes the adsorption equilibrium. Adsorption kinetic data is compatible with second-order reaction kinetics. Thermodynamic calculations show that adsorption is spontaneous and endothermic. All the data obtained from the study show that the KOH-Zt adsorbent obtained after chemical conditioning applied on clinoptilolite, which is an effective and inexpensive adsorbent, is preferable for Cu(II) adsorption.

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