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Non-isothermal bioreactors in enzymatic remediation of waters polluted by endocrine disruptors: BPA as a model of pollutant

Paper ID Volume ID Publish Year Pages File Format Full-Text
48625 46515 2007 10 PDF Available
Title
Non-isothermal bioreactors in enzymatic remediation of waters polluted by endocrine disruptors: BPA as a model of pollutant
Abstract

The bioremediation of waters polluted by Bisphenol A, taken as a model for endocrine disruptors, has been pursued by means of catalytic membranes in bioreactors operating under isothermal and non-isothermal conditions. Laccase from Trametes versicolor was immobilized on nylon membranes grafted with Glycidyl Methacrylate and using Phenylendiamine as spacer. The behaviour of the catalytic membrane was studied as a function of BPA concentration. Affinities of immobilized laccase towards BPA were found to increase with average temperature and under non-isothermal conditions. Percentage increases of enzyme activity, proportional to the applied temperature differences, were found to decrease with the increase of BPA concentrations. Interestingly, the highest levels of BPA biodegradation occurred at the lowest concentrations, in other words those present in wastewaters given the small water solubility of this compound. The results are discussed in terms of the process of thermodialysis by considering the additional BPA fluxes towards the immobilized enzymes driven by the temperature gradients.

Keywords
Water bioremediation; Endocrine disruptors; Bisphenol A; Immobilized laccase; Bioreactors
First Page Preview
Non-isothermal bioreactors in enzymatic remediation of waters polluted by endocrine disruptors: BPA as a model of pollutant
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 69, Issues 3–4, 15 January 2007, Pages 252–261
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis