University of Guilan Caspian Journal of Environmental Sciences 1735-3033 21 2 2023 04 01 Enhanced removal of amoxicillin and chlorophenol as a model of wastewater pollutants using hydrogel nanocomposite: Optimization, thermodynamic, and isotherm studies 411 422 6535 10.22124/cjes.2023.6535 EN Aseel M. Aljeboree Department of Chemistry, College of Sciences for W, University of Babylon, Hilla, Iraq Zainab D. Alhattab Ministry of Interior Affairs, Babylon Police Command, Criminal Evidence Investigation Department, Iraq Usama S. Altimari Department of Medical Laboratories Technology, AL-Nisour University College, Baghdad, Iraq Ahmed Kareem Obaid Aldulaim Department of Pharmacy, Al-Zahrawi University College, Karbala, Iraq Asmaa Kefah Mahdi National University of Science and Technology, Dhi Qar, Iraq Ayad F. Alkaim Department of Chemistry, College of Sciences for W, University of Babylon, Hilla, Iraq Journal Article 2023 05 13 Studies have been conducted to gain understandings and generic knowledge of the equilibrium aspects of adsorption of different adsorbents, SA-Bn-TiO<sub>2</sub> NPs surfaces. Removal of two pollutants, Amoxicillin drug AMX, 4-chlorophenol (CPH) from aqueous solutions by adsorption with SA-Bn-TiO<sub>2</sub> NPs, SA-Bn and TiO<sub>2</sub> NPs surfaces were experimentally determined. The best results were found at pH 6.6, temperature 30 ºC, and adsorbent dosage of 0.05 g of SA-Bn-TiO<sub>2</sub> NPs for both studying adsorption capacity and removal percentage. The morphology and structure of the SA-Bn-TiO<sub>2 </sub>NPs hydrogel beads were investigated utilizing Ultraviolet-Visible Spectroscopy (UV–Vis), Fourier Transform Infrared (FT-IR), Thermo gravimetric analysis (TGA), Field Emission Scanning Electron Microscopy (FE-SEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-Ray (EDX) and X-ray Diffraction Spectroscopy (XRD). The best contact time for equilibrium reached one hour. It is essentially due to saturation of the active site which does not let further adsorption to take place. For the two pollutants onto hydrogel, best adsorption was found to be at pH 11, and adsorption raised by increase in the pH solution. The value negative of ∆G confirmed that the nature adsorption process is spontaneous. The value positive of ∆S confirmed the raise randomness at the solid-solution interface pending adsorption and the value positive of ∆H confirmed that adsorption process is endothermic. hydrogel Drug Endothermic Spontaneous Amoxicillin 4-Chlorophenol https://cjes.guilan.ac.ir/article_6535_3959b4bce92a9cb113041f5cf720add7.pdf