Biodegradation of Bisphenol a by Chlorella vulgaris and Aeromonas Hydrophilia

Abstract

Bisphenol A (BPA) is an important raw material which has been used in plastic industry and released into environment by industrial applications. Endocrine disruptor chemicals (EDS) disturb endocrine functions in animals.
BPA is a well known to be estrogenic-like EDS. In this study, biodegradation of BPA by Aeromonas hydrophilia and Chlorella vulgaris investigated. Biodegradation test result showed that BPA easily biodegraded by A. hydrophilia at 60 and 120 mgL-1 concentrations within 6 day and C. vulgaris at 20 mgL-1 concentrations within 7 day. No inhibitory effect on cell growth seen for A. hydrophilia but cell growth inhibition determined for C. vulgaris above 20 mgL-1 concentrations of BPA. The first-order kinetic model used to describe the biodegradation kinetic and it was fitted well with test results. 1-(3-methylbuthyl)-2, 3, 4, 6-tetramethylbenzene and 4-(1-hydroxy-2-methylprop-1-enyl) phenol were
found to be biodegradation intermediate products. The estrogenic activities of BPA decrease after biodegradation and it could not be detect after 6 and 7 days.