Environmental assessment for bisphenol-a and polycarbonate

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dc.contributor.author Chow, Jimmy T.
dc.date.accessioned 2007-08-06T18:20:23Z
dc.date.available 2007-08-06T18:20:23Z
dc.date.issued 2007-08-06T18:20:23Z
dc.identifier.uri http://hdl.handle.net/2097/368
dc.description.abstract Polycarbonate products have been used extensively world wide for decades because they are lightweight, shatter-resistant and considered to be safe. Polycarbonate is a thermoplastic that is used to make compact discs, phones, lenses, and food contact products such as water bottles, baby bottles and food storage containers. For more than half century, there has been interest in polycarbonate (PC) products and the monomer bisphenol-A (BPA) because BPA can leach from food polycarbonate containers. The environmental fate for both chemicals in air, water and soil is of interest, also. To understand the fate of polycarbonate, its main degradation pathways, main degradation mechanisms and main products are reviewed. These pathways are thermal degradation, photo-degradation and hydrolysis under different conditions. Furthermore, key topics like PC degradation kinetics and PC chemical resistance are part of this comprehensive discussion. The biodegradation of BPA has been thoroughly studied. About twelve lab methods for environmental fate are summarized and reviewed to understand the “big picture” for BPA degradation. This includes screening tests, which assess the ready and inherent degradability, to simulation tests for surface waters, soils and wastewater treatment systems. The testing of all methods is examined under conditions close to the real environment fate. Furthermore, the fate distribution for BPA based on the Equilibrium Criterion Model (EQC) model is reviewed. Extensive research on polycarbonate and BPA has been conducted in the last fifty years. During this time, both chemicals have been studied and tested by industry and government agencies. The pharmacological test results from major studies indicate that consumer exposure to BPA at concentrations normally experienced in daily living does not pose a risk to human health. On the other hand, minor toxicological studies indicate potential risks to human health. Research on health and safety are continuing. en
dc.language.iso en_US en
dc.publisher Kansas State University en
dc.subject Environmental fate en
dc.subject Polycarbonate en
dc.subject BPA en
dc.subject Biodegradation en
dc.subject Chemical resistance en
dc.subject toxicology en
dc.title Environmental assessment for bisphenol-a and polycarbonate en
dc.type Report en
dc.description.degree Master of Science en
dc.description.level Masters en
dc.description.department Department of Chemical Engineering en
dc.description.advisor Larry E. Erickson en
dc.subject.umi Engineering, Chemical (0542) en
dc.subject.umi Engineering, Environmental (0775) en
dc.subject.umi Health Sciences, Toxicology (0383) en
dc.date.published 2007 en
dc.date.graduationmonth August en

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