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. 2014 Jun 11:12:93.
doi: 10.1186/2052-336X-12-93. eCollection 2014.

Removal of phenol and bisphenol-A catalyzed by laccase in aqueous solution

Zahra Asadgol  1 , Hamid Forootanfar  2 , Shahla Rezaei  3 , Amir Hossein Mahvi  4 , Mohammad Ali Faramarzi  3
Affiliations

Removal of phenol and bisphenol-A catalyzed by laccase in aqueous solution

Zahra Asadgol et al. J Environ Health Sci Eng. .

Abstract

Background: Elimination of hazardous phenolic compounds using laccases has gained attention during recent decades. The present study was designed to evaluate the ability of the purified laccase from Paraconiothyrium variabile (PvL) for elimination of phenol and the endocrine disrupting chemical bisphenol A. Effect of laccase activity, pH, and temperature on the enzymatic removal of the mentioned pollutants were also investigated.

Results: After 30 min treatment of the applied phenolic pollutants in the presence of PvL (5 U/mL), 80% of phenol and 59.7% of bisphenol A was removed. Increasing of laccase activity enhanced the removal percentage of both pollutants. The acidic pH of 5 was found to be the best pH for elimination of both phenol and bisphenol A. Increasing of reaction temperature up to 50°C enhanced the removal percentage of phenol and bisphenol A to 96.3% and 88.3%, respectively.

Conclusions: To sum up, the present work introduced the purified laccase of P. variabile as an efficient biocatalyst for removal of one of the most hazardous endocrine disruptor bisphenol A.

Keywords: Bisphenol A; Laccase; Paraconiothyrium variabile; Pollutant; Removal.

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Figures

Figure 1
Figure 1
Time courses of phenol and bisphenol A removal (initial concentration of 4 mM) using the purified laccase of P. variabile (5 U/mL) dissolved in citrate buffer 20 mM pH 5.
Figure 2
Figure 2
Effect of laccase activity on removal percentage of phenolic pollutants (initial concentration of 4 mM) after 30 min enzymatic treatment.
Figure 3
Figure 3
Influence of pH alteration on removal of bisphenol A and phenol in presence of the purified laccase of P. variabile (5 U/mL) after 30 min enzymatic treatment.
Figure 4
Figure 4
Effect of temperature on bisphenol A and phenol removal after 30 min treatment by the purified laccase of P. variabile (5 U/mL).
See this image and copyright information in PMC

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