Degradation of Adsorbed Bisphenol A by Soluble Mn(III).

Autor:	Sun Y; Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.; Center for Environmental Biotechnology, University of Tennessee, Knoxville, Tennessee 37996, United States.; Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Im J; Department of Civil Engineering, Kansas State University, Manhattan, Kansas 66503, United States., Shobnam N; Department of Civil Engineering, Kansas State University, Manhattan, Kansas 66503, United States., Fanourakis SK; Department of Materials Science and Engineering, University of Houston, Houston, Texas 77204, United States., He L; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Anovitz LM; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Erickson PR; REGENESIS, San Clemente, California 92673, United States., Sun H; Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Tennessee 37996, United States., Zhuang J; Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Tennessee 37996, United States., Löffler FE; Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.; Center for Environmental Biotechnology, University of Tennessee, Knoxville, Tennessee 37996, United States.; Department of Microbiology, University of Tennessee, Knoxville, Tennessee 37996, United States.; Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Tennessee 37996, United States.; Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
Jazyk:	angličtina
Zdroj:	Environmental science & technology [Environ Sci Technol] 2021 Oct 05; Vol. 55 (19), pp. 13014-13023. Date of Electronic Publication: 2021 Sep 24.
DOI:	10.1021/acs.est.1c03862
Abstrakt:	Bisphenol A (BPA), a high production volume chemical and potential endocrine disruptor, is found to be associated with sediments and soils due to its hydrophobicity (log K OW of 3.42). We used superfine powdered activated carbon (SPAC) with a particle size of 1.38 ± 0.03 μm as a BPA sorbent and assessed degradation of BPA by oxidized manganese (Mn) species. SPAC strongly sorbed BPA, and desorption required organic solvents. No degradation of adsorbed BPA (278.7 ± 0.6 mg BPA g -1 SPAC) was observed with synthetic, solid α-MnO 2 with a particle size of 15.41 ± 1.35 μm; however, 89% mass reduction occurred following the addition of 0.5 mM soluble Mn(III). Small-angle neutron scattering data suggested that both adsorption and degradation of BPA occurred in SPAC pores. The findings demonstrate that Mn(III) mediates oxidative transformation of dissolved and adsorbed BPA, the latter observation challenging the paradigm that contaminant desorption and diffusion out of pore structures are required steps for degradation. Soluble Mn(III) is abundant near oxic-anoxic interfaces, and the observation that adsorbed BPA is susceptible to degradation has implications for predicting, and possibly managing, the fate and longevity of BPA in environmental systems.
Databáze:	MEDLINE
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