| Literature DB >> 28658640 |
Rui Wang1, Sai Wang1, Yiping Tai1, Ran Tao1, Yunv Dai1, Jingjing Guo1, Yang Yang2, Shunshan Duan3.
Abstract
Biogenic manganese oxides (BioMnOx) have attracted considerable attention as active oxidants, adsorbents, and catalysts. This study investigated the characteristics of algae-generated BioMnOx and determined its oxidative activity towards bisphenol A (BPA), an endocrine disrupter. Amorphous nanoparticles with a primary Mn valency of +3 were found in BioMnOx produced by Desmodesmus sp. WR1. The mechanism might be that algal growth created conditions favorable to Mn oxidation through increasing DO and pH. Initial Mn2+ concentrations of 6, 30, and 50mgL-1 produced a maximum of 5, 13, and 11mgL-1 of BioMnOx, respectively. Mn2+-enriched cultures exhibited the highest BPA removal efficiency (∼78%), while controls only reached about 27%. BioMnOx may significantly promote BPA oxidation in algae culture, enhancing the accumulation of substrates for glycosylation. Moreover, continuous BioMnOx increase and Mn2+ decrease during BPA oxidation confirmed Mn oxide regeneration. In conclusion, Mn oxide formation by microalgae has the potential to be used for environmental remediation.Entities:
Keywords: Biogenic manganese oxide; Bisphenol A; Desmodesmus sp. WR1; Oxidative degradation; Regeneration
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Year: 2017 PMID： 28658640 DOI： 10.1016/j.jhazmat.2017.06.026
Source DB: PubMed Journal: J Hazard Mater ISSN： 0304-3894 Impact factor: 10.588