Combined Use of Biopolymer Chitosan and Enzyme Tyrosinase for Removal of Bisphenol A and its Derivatives from Aqueous Solutions

Kazunori Yamada, Mizuho Suzuki, Ayumi Kashiwada and Kiyomi Matsuda
Nihon University, Chiba, Japan, and others

Series: Biotechnology in Agriculture, Industry and Medicine
BISAC: SCI010000

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Volume 10

Issue 1

Volume 2

Volume 3

Special issue: Resilience in breaking the cycle of children’s environmental health disparities
Edited by I Leslie Rubin, Robert J Geller, Abby Mutic, Benjamin A Gitterman, Nathan Mutic, Wayne Garfinkel, Claire D Coles, Kurt Martinuzzi, and Joav Merrick

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This book investigates the availability of chitosan for removal of bisphenol A (BPA, 2,2-bis(hydroxyphenyl)propane) through the tyrosinase-catalyzed quinone oxidation. First, the process parameters, such as the hydrogen peroxide (H2O2)-to-BPA ratio, pH value, temperature, and tyrosinase dose, were discussed in detail for the enzymatic quinone oxidation of BPA. Tyrosinase-catalyzed quinone oxidation of BPA was found to be effectively enhanced by adding H2O2, and the optimum conditions for BPA at 0.3 mM were determined to be pH 7.0 and 40ºC in the presence of H2O2 at 0.3 mM ([H2O2]/[BPA]=1.0). Removal of BPA from aqueous solutions was accomplished by adsorption of enzymatically generated quinone derivatives on chitosan beads. (Imprint: Nova Biomedical)

ABSTRACT

1. INTRODUCTION

2. TYROSINASE-CATALYZED QUINONE OXIDATION OF BPA

3. REACTION OF QUINONE WITH CHITOSAN’S AMINO GROUP

4. REMOVAL OF BPA

5. REMOVAL OF BISPHENOL DERIVATIVES

6. CONCLUSIONS

7. REFERENCES

INDEX

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