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Deprecated: Implicit conversion from float 298.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Water+Air+Soil+Pollut 2015 ; 226 (8): ä Nephropedia Template TP
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Biotransformation of Endocrine-Disrupting Compounds in Groundwater: Bisphenol A, Nonylphenol, Ethynylestradiol and Triclosan by a Laccase Cocktail from Pycnoporus sanguineus CS43 #MMPMID26190872
Garcia-Morales R; Rodríguez-Delgado M; Gomez-Mariscal K; Orona-Navar C; Hernandez-Luna C; Torres E; Parra R; Cárdenas-Chávez D; Mahlknecht J; Ornelas-Soto N
Water Air Soil Pollut 2015[]; 226 (8): ä PMID26190872show ga
The biodegradation of organic compounds present in water at trace concentration has become a critical environmental problem. In particular, enzymatic oxidation by fungal laccases offers a promising alternative for efficient and sustainable removal of organic pollutants in water. In this work, the biocatalytic ability of laccases from the Pycnoporus sanguineus CS43 fungus was evaluated. A filtered culture supernatant (laccase cocktail) evidenced an enhanced biotransformation capability to remove common endocrine-disruptor compounds (EDCs), such as bisphenol A, 4-nonylphenol, 17-?-ethynylestradiol and triclosan. A biodegradation of around 89?100 % was achieved for all EDCs using synthetic samples (10 mg L?1) and after the enzymatic treatment with 100 U L?1 (50.3 U mg ?1). The biodegradation rates obtained were fitted to a first order reaction. Furthermore, enzymatic biocatalytic activity was also evaluated in groundwater samples coming from northwestern Mexico, reaching biotransformation percentages between 55 and 93 % for all tested compounds. As far as we know this is the first study on real groundwater samples in which the enzymatic degradation of target EDCs by a laccase cocktail from any strain of Pycnoporus sanguineus was evaluated. In comparison with purified laccases, the use of cocktail offers operational advantages since additional purification steps can be avoided.