Assessment of the efficiency of synergistic photocatalysis on penicillin G biodegradation by whole cell Paracoccus sp

Author:

Wang Peng,Liu Shouxin,Wang Xiaochun,Cong Qinqin,Lu Jialin

Abstract

Abstract Background The Paracoccus sp. strain isolated from sludge was identified and evaluated for catalytic activity in the degradation of penicillin G. Results High degradation efficiency and synergistic catalytic effects of the whole cell and visible light without additional catalysts were observed. The key factors influencing the degradation and kinetics of penicillin G were investigated. The results showed the phenylacetic acid, which was produced during penicillin G biodegradation, exhibited stronger inhibiting effects on KDSPL-02. However, this effect was reduced by visible light irradiation without any additional photocatalyst; furthermore, the rate of penicillin G biodegradation was accelerated, reaching a 100% rate in 12 h at a penicillin G concentration of 1.2 g/L. Four key intermediates produced during penicillin G degradation were isolated and identified by LC–MS, 1H NMR, and 13C NMR. Enzymes involved in the PAA pathway were proposed from a genomic analysis of KDSPL-02. Conclusions These results provide a new method for bio-degrading of penicillin or other antibiotic pollutants using photoaccelerating biocatalysts with greater efficiency and more environmentally friendly conditions.

Funder

National Natural Science Foundation of China

The Excellent Going Abroad Experts’ Training Program in Hebei Province

Hebei Province High-level Talents Funded Project

s&t program of hebei

Publisher

Springer Science and Business Media LLC

Subject

Cell Biology,Molecular Biology,Biomedical Engineering,Environmental Engineering

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