Melanin-embedded materials effectively remove hexavalent chromium (CrVI ) from aqueous solution

Environmental Health and Preventive Medicine
An Manh CuongNguyen Dinh Thang

Abstract

Currently, it is recognized that water polluted with toxic heavy metal ions may cause serious effects on human health. Therefore, the development of new materials for effective removal of heavy metal ions from water is still a widely important area. Melanin is being considered as a potential material for removal of heavy metal from water. In this study, we synthesized two melanin-embedded beads from two different melanin powder sources and named IMB (Isolated Melanin Bead originated from squid ink sac) and CMB (Commercial Melanin Bead originated from sesame seeds). These beads were of globular shape and 2-3 mm in diameter. We investigated and compared the sorption abilities of these two bead materials toward hexavalent-chromium (CrVI) in water. The isotherm sorption curves were established using Langmuir and Freundlich models in the optimized conditions of pH, sorption time, solid/liquid ratio, and initial concentration of CrVI. The FITR analysis was also carried out to show the differences in surface properties of these two beads. The optimized conditions for isotherm sorption of CrVI on IMB/CMB were set at pH values of 2/2, sorption times of 90/300 min, and solid-liquid ratios of 10/20 mg/mL. The maximum sorption capacities c...Continue Reading

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Citations

Sep 16, 2019·Environmental Health and Preventive Medicine·Hosein AlidadiMaryam Fakhari
Jul 9, 2020·International Journal of Environmental Research and Public Health·Olaonipekun OyebanjoJohn Odiyo
May 19, 2019·Environmental Health and Preventive Medicine·Wei ChenMasashi Kato
Apr 15, 2019·Environmental Science and Pollution Research International·Shaimaa MaherHaitham Kalil
Apr 25, 2020·Nanomaterials·Fabrício Eduardo Bortot CoelhoGiuliana Magnacca
Jan 15, 2021·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Fabrício E Bortot CoelhoTânia L S Miranda

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