Melanin nano-pigments for heavy metal remediation from water
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor and Francis Inc. 325 Chestnut St, Suite 800 Philadelphia PA 19106
Abstract
Melanins are water insoluble polyphenol compounds. The metal ion chelating property of natural melanin is exploited for removal of heavy metals from contaminated water. We optimized biosynthesis of melanin from marine bacterium using different growth media, media components, and operating conditions. Optimized medium yielded 513 mg/L melanin at 36 h of incubation, which was 3.15 times higher than the yield before optimization. Particle size analysis of the biosynthesized melanin indicated a size of 32 ± 0.98 nm. Preliminary investigation indicated that melanin nanoparticles could adsorb different heavy metals such as chromium, selenium, and lead from very low initial concentrations. © 2018, © 2018 Taylor & Francis.
Description
Keywords
Adsorption, Bacteria, Biochemistry, Biosynthesis, Heavy metals, Melanin, Metal ions, Metal nanoparticles, Particle size, Particle size analysis, Water pollution, Chelating properties, Contaminated water, Heavy metal remediation, Initial concentration, Marine bacterium, Media components, Operating condition, Pseudomonas stutzeri, Chemicals removal (water treatment)
Citation
Separation Science and Technology, 2019, 54, 2, pp. 265-274