Adsorption of Ag(I) ions from wastewaters using poly(2-aminothiazole): kinetic and isotherm studies

In this study, 2-aminothiazole, (2AT), was polymerized with benzoyl peroxide in 1,4-dioxane solution, and adsorption efficiencies of poly(2-aminothiazole), P-2AT, for the Ag(I) ions to remove from the aqueous solutions were investigated. Adsorption experiments were studied at different pH, contact time and initial Ag(I) ion concentration in a batch system. The optimal pH for Ag(I) adsorption onto P-2AT was found to be 5.0, and the maximum adsorption capacity was determined to be 336.98 mg/g for 1200 mg/L Ag(I) solution at 90 min. P-2AT adsorbents were followed up by recycling in multiple adsorption cycles. The results showed that adsorbent can be used several times. Ag(I) ion adsorption performance of the P-2AT was investigated in conjunction with Cu(II) and Zn(II) ions. The selectivity series of ions were found as Ag(I) > Cu(II) > Zn(II). According to the experimental data, the adsorption reaction fitted the pseudo-second-degree kinetic model and the Langmuir isotherm equation.