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Nano-TiO2 modified with 2-mercaptobenzimidazole as an efficient adsorbent for removal of Ag(I) from aqueous solutions |
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| Affiliation: | 1. Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab, 140001, India;2. Department of Applied Science & Humanities, Jawaharlal Nehru Govt. Eng. College, Sundernagar, India;3. Department of Chemistry, Yonsei University, Wonju 26493, Republic of Korea;1. Corrosion and Protection Centre, School of Materials, The University of Manchester, Sackville Street, Manchester M13 9PL, UK;2. Coordinación Tecnológica de Ingeniería de Corrosión y Producción, Dirección de Exploración y Producción, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Norte 152, CP 07730 DF, Mexico;1. Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea;2. Department of Chemistry, Shaheed Benazir Bhutto University, Sheringal Dir (U), Khyber Pakhtunkhwa, Pakistan |
| Abstract: | Nano-TiO2 was modified with 2-mercaptobenzimidazole via surfactant activation and used as an adsorbent for the removal of Ag(I) under optimum conditions. The adsorbent was characterized using powder X-ray diffraction and FT-IR spectroscopy. The equilibrium data were fitted to the Langmuir, Freundlich and Temkin isotherm models. Langmuir isotherm describes the adsorption data better than Freundlich isotherm and Temkin. Kinetic studies showed that the pseudo second order kinetic model fits the adsorption kinetic processes well. Maximum adsorption capacity for Ag(I) was 128.2 mg g−1 of nano-TiO2. The method was successfully applied to the removal of silver from radiology film processing wastewater samples. |
| Keywords: | Ag(I) 2-Mercaptobenzimidazole Removal Langmuir isotherm |
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