1. Sunlight active PSf/TiO 2 hybrid membrane for elimination of chromium
- Author
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Vignesh Nayak, M.S. Jyothi, Mahesh Padaki, and R. Geetha Balakrishna
- Subjects
General Chemical Engineering ,Radical ,Inorganic chemistry ,General Physics and Astronomy ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,law.invention ,Metal ,chemistry.chemical_compound ,Chromium ,Membrane ,chemistry ,law ,visual_art ,Photocatalysis ,visual_art.visual_art_medium ,Polysulfone ,0210 nano-technology ,Bifunctional ,Filtration - Abstract
The report aims to develop and use sunlight-active catalyst-membrane to reduce toxic Cr (VI) to less toxic Cr (III) and to reject Cr (III) from Cr contaminated water. Polysulfone and TiO2 nanoparticles were hybridized, to induce a bifunctional efficacy of metal ion reduction and separation. Reduction of Cr (VI) results in the formation of Cr (III), which is larger in size facilitating rejection. Hybrid membranes possess superior hydrophilicity and permeability with an added advantage of enhanced metal ion reduction and rejection. Photoreduction of Cr (VI) requires the presence of acid to avoid accumulation of holes and hydroxyl radicals in the reaction medium. Cr (III) solution obtained after photoreduction was subjected to direct filtration without any pretreatment, so as to obtain complete Cr-free water.
- Published
- 2017