The Synthetic Melanin Nanoparticles Having An Excellent Binding Capacity of Heavy Metal Ions

Bulletin of the Korean chemical society

Jin-Kyu Lee¹  Da Jeong Kim¹  Kuk-Youn Ju¹ 

关键词: Melanin nanoparticles;    Artificial melanin;    Oxidation-polymerization;    Heavy metal removal;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Spherical-shape melanin nanoparticles with good water-dispersibility were successfully synthesized by a simple oxidation polymerization of 3,4-dihydroxy-phenylalanin (DOPA) with KMnO4. Similar features to those known from natural and synthetic melanin polymers were observed from prepared melanin nanoparticles by FT-IR, UV-Vis., and ESR spectroscopic methods. Their binding ability with several heavy metal ions from aqueous solution was quantitatively investigated, and the maximum binding capacities with melanin nanoparticles to lead, copper, and cadmium ions were obtained as 2.45, 2.17 and 1.88 mmol/g, respectively, which are much larger values than those reported from natural and synthetic melanin polymers. The large binding capacity and fast binding rate of melanin nanoparticles to metal ions can make them an excellent candidate for the remediation of contaminated water.

【 授权许可】

Unknown