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Melanin-Based Coatings as Lead-Binding Agents
Joint Authors
Belitsky, Jason M.
Boyd, W. Christopher
Lye, Diane
Sono, Karin
Moore, Christine A.
Gorlin, Thomas A.
Source
Bioinorganic Chemistry and Applications
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-04-26
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Interactions between metal ions and different forms of melanin play significant roles in melanin biochemistry.
The binding properties of natural melanin and related synthetic materials can be exploited for nonbiological applications, potentially including water purification.
A method for investigating metal ion-melanin interactions on solid support is described, with lead as the initial target.
2.5 cm discs of the hydrophobic polymer PVDF were coated with synthetic eumelanin from the tyrosinase-catalyzed polymerization of L-dopa, and with melanin extracted from human hair.
Lead (Pb2+) binding was quantified by atomic absorption spectroscopy (flame mode), and the data was well fit by the Langmuir model.
Langmuir affinities ranged from 3.4·103 to 2.2·104 M-1.
At the maximum capacity observed, the synthetic eumelanin coating bound ~9% of its mass in lead.
Binding of copper (Cu2+), zinc (Zn2+), and cadmium (Cd2+) to the synthetic-eumelanin-coated discs was also investigated.
Under the conditions tested, the Langmuir affinities for Zn2+, Cd2+, and Cu2+ were 35%, 53%, and 77%, respectively, of the Langmuir affinity for Pb2+.
The synthetic-eumelanin-coated discs have a slightly higher capacity for Cu2+ on a per mole basis than for Pb2+, and lower capacities for Cd2+ and Zn2+.
The system described can be used to address biological questions and potentially be applied toward melanin-based water purification.
American Psychological Association (APA)
Sono, Karin& Lye, Diane& Moore, Christine A.& Boyd, W. Christopher& Gorlin, Thomas A.& Belitsky, Jason M.. 2012. Melanin-Based Coatings as Lead-Binding Agents. Bioinorganic Chemistry and Applications،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-465930
Modern Language Association (MLA)
Sono, Karin…[et al.]. Melanin-Based Coatings as Lead-Binding Agents. Bioinorganic Chemistry and Applications No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-465930
American Medical Association (AMA)
Sono, Karin& Lye, Diane& Moore, Christine A.& Boyd, W. Christopher& Gorlin, Thomas A.& Belitsky, Jason M.. Melanin-Based Coatings as Lead-Binding Agents. Bioinorganic Chemistry and Applications. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-465930
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-465930