Removal of bisphenol A by laccases from Pleurotus ostreatus and Pleurotus pulmonarius and evaluation of ecotoxicity of degradation products was written by Neiverth de Freitas, Emanuelle;Bubna, Gisele Adriana;Brugnari, Tatiane;Kato, Camila Gabriel;Nolli, Mariene;Rauen, Thalita G.;Moreira, Regina de Fatima Peralta Muniz;Peralta, Rosely Aparecida;Bracht, Adelar;de Souza, Cristina G. M.;Peralta, Rosane Marina. And the article was included in Chemical Engineering Journal (Amsterdam, Netherlands) in 2017.Product Details of 763-69-9 The following contents are mentioned in the article:
Bisphenol A (BPA) is an endocrine disruptor compound, that is continuously released into the environment and is barely degraded in wastewater treatment plants. In this work, crude laccases from Pleurotus ostreatus and Pleurotus pulmonarius were used for the first time to degrade BPA in aqueous solution The residual BPA was quantified by HPLC and the BPA metabolites produced by action of the laccases were identified by GC-MS. BPA at 100 mg/L and 200 mg/L (0.88 mmol/L) were 100% and 85% removed, resp., in a 1 h reaction by both fungal laccases at a concentration of 8 U/L. Thirteen aromatic and aliphatic BPA metabolites were identified, including p-isopropenylphenol, methylpent-3-oic acid, ethyl-3-ethoxy propanoate, and 4-ethyl-2-methoxyphenol. The acute BPA toxicity decreased from 85% to less than 5% using the P. ostreatus laccase. P. pulmonarius laccase, did not caused reduction in toxicity, possibly because at least one BPA metabolite was as toxic as the parent compound itself. The results of this study suggest a feasible method for the complete removal of BPA from polluted environments using crude laccase from P. ostreatus. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Product Details of 763-69-9).
Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Product Details of 763-69-9
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics