Biodecontamination of water from bisphenol A using ligninolytic fungi and the modulation role of humic acids.

Ecotoxicol Environ Saf

Dipartimento di Biologia e Chimica Agro-forestale e Ambientale, University of Bari, Via Amendola 165/A, 70126 Bari, Italy.

Published: May 2012

AI Article Synopsis

  • Bisphenol A (BPA) is an endocrine disruptor commonly found in industrial and urban water sources, while recent studies highlight the potential of ligninolytic fungi to degrade such contaminants.
  • The study specifically examined the effectiveness of three fungi—Trametes versicolor, Stereum hirsutum, and Pleurotus ostreatus—in removing BPA from water at a concentration of 4.6 mg/L, comparing their performance in different growth conditions.
  • Findings demonstrated that while all three fungi could remove BPA in a simple growth medium, the presence of humic acids from leonardite and green compost significantly improved fungal growth and BPA removal effectiveness, with T. versicolor showing the best results.

Article Abstract

Bisphenol A (BPA) is an endocrine disruptor compound (EDC) of xenobiotic origin occurring in natural waters and wastewaters, especially in the most industrialized and urbanized areas. Recent investigations report the use of ligninolytic fungi for the removal of aromatic contaminants, including some EDCs, from different matrices. Humic acids (HA) are widely spread in all natural systems and their presence is ascertained to interfere with microbial growth and activity. The objective of this study was to assess the capacity of three ligninolytic fungi, Trametes versicolor, Stereum hirsutum and Pleurotus ostreatus, to remove BPA at the concentration of 4.6 mg L(-1) from water. Fungal growth on potato dextrose agar (PDA), in the absence and in the presence of a leonardite HA or a green compost HA, was evaluated during the biodecontamination process. The methodological approach adopted in this study excluded the presence of the mycelium in the contaminated water. Results obtained evidenced a relevant removal of BPA by any fungus when PDA only was used as growing medium. The addition of leonardite HA and compost HA stimulated the mycelial growth of any fungus, especially T. versicolor, and significantly enhanced the removal of the contaminant from water by, respectively, T. versicolor only and T. versicolor and S. hirsutum.

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http://dx.doi.org/10.1016/j.ecoenv.2012.01.013DOI Listing

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