Yilmaz, SakirSahan, TekinKarabakan, Abdulkerim2025-05-102025-05-1020170256-11151975-722010.1007/s11814-017-0116-z2-s2.0-85020134737https://doi.org/10.1007/s11814-017-0116-zhttps://hdl.handle.net/20.500.14720/12001Sahan, Tekin/0000-0001-8776-9338; Yilmaz, Sakir/0000-0001-9797-0959The optimization of Hg(II) adsorption conditions from aqueous solutions with 3-mercaptopropyl trimethoxysilane-modified kaolin (MMK) used as a new adsorbent was analyzed by response surface methodology (RSM) approach. The MMK adsorbent was characterized by means of energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). According to the quadratic model obtained from central composite design (CCD) in RSM, the optimal conditions for adsorption were found to be 30.83 mg/L, 0.1 g, 7.44 and 31.41 A degrees C for C (o) , adsorbent dosage, initial pH, and T (A degrees C), respectively. With the obtained model, the maximum amount of adsorbed Hg(II) and %Hg(II) removed was calculated to be 30.10 mg/g and 98.01%, respectively. Langmuir and Dubinin-Radushkevich isotherms fitted well the experimental results. Thermodynamic studies revealed that the adsorption was physical, exothermic, spontaneous. The results indicate that MMK a new adsorbent has great potential for the removal of Hg(II) from aqueous media.eninfo:eu-repo/semantics/closedAccessAdsorptionCentral Composite DesignKaolinMercaptoMercuryResponse Surface MethodologyArticle348Q3Q222252235WOS:000406393800013