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Development of a Surfactant-Containing Process to Improve the Removal Efficiency of Phenol and Control the Molecular Weight of Synthetic Phenolic Polymers Using Horseradish Peroxidase in an Aqueous System.

Authors :
Yao, Chao-Ling
Lin, Che-Chi
Chu, I-Ming
Lai, Yi-Ting
Source :
Applied Biochemistry & Biotechnology; May2020, Vol. 191 Issue 1, p45-58, 14p
Publication Year :
2020

Abstract

To reduce phenolic pollutants in the environment, many countries have imposed firm restrictions on industrial wastewater discharge. In addition, the current industrial process of phenolic resin production uses phenol and formaldehyde as the reactants to perform a polycondensation reaction. Due to the toxicity of formaldehyde and phenolic pollutants, the main purpose of this research was to design a green process using horseradish peroxidase (HRP) enzymatic polymerization to remove phenols and to produce formaldehyde-free phenolic polymers. In this study, the optimal reaction conditions, such as reaction temperature, pH, initial phenol concentration and initial ratio of phenol, and H<subscript>2</subscript>O<subscript>2</subscript>, were examined. Then, the parameters of the enzyme kinetics were determined. To solve the restriction of enzyme inactivation, several nonionic surfactants were selected to improve the phenol removal efficiency, and the optimal operation conditions in a surfactant-containing system were also confirmed. Importantly, the molecular weight of the synthetic phenolic polymers could be controlled by adjusting the ratio of phenol and H<subscript>2</subscript>O<subscript>2.</subscript> The content of biphenols in the products was almost undetectable. Collectively, a green chemistry process was proposed in this study and would benefit the treatment of phenol-containing wastewater and the production of formaldehyde-free phenolic resin in the future. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02732289
Volume :
191
Issue :
1
Database :
Complementary Index
Journal :
Applied Biochemistry & Biotechnology
Publication Type :
Academic Journal
Accession number :
143661021
Full Text :
https://doi.org/10.1007/s12010-020-03245-6