Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 385, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.121584
Keywords
BPA; Natural attenuation; Transformation products; GC-C-IRMS; Path coefficient analysis
Categories
Funding
- Natural Science Foundation of Fujian Province [2017J06013]
- National Science Foundation of China [41573102, 41673099]
- Youth Innovation Promotion Association CAS [2016280]
- PIFI CAS [2017VEB0008]
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Residues of bisphenol A (BPA) are ubiquitously detected in the surface water due to its widespread usage. This study systematically investigated the dissipation and kinetics of BPA under simulated hydrolysis, direct and indirect photolysis, bacterial degradation, microbial degradation and natural attenuation in microcosm. Structural equation modeling (SEM) by using partial least square method in path coefficient analysis suggested that the microbial degradation was the major factor involved in the natural attenuation of BPA. The potential transformation products were identified by using liquid chromatography high-resolution mass spectrometry (LC-HRMS) and stable isotope tracing technique by simultaneous performing gas chromatography combustion isotope ratio mass spectrometry (GC-C-IRMS) and gas chromatography mass spectrometry (GC-MS). A total of fourteen including three novel transformation products of BPA were identified to indicate five possible pathways. An increased yield of labeled (delta C-13) CO2 and detection of C-13-labeled phospholipid fatty acids (PLFAs) indicated the mineralization of BPA and possible utilization of BPA or its transformation products by microbes for cellular membrane synthesis, respectively.
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