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Full-Text Articles in Environmental Engineering
Abiotic And Biotic Degradation Of Bisphenols, Yanchen Sun
Abiotic And Biotic Degradation Of Bisphenols, Yanchen Sun
Doctoral Dissertations
Bisphenol A (BPA), as well as its substitutes bisphenol S (BPS) and bisphenol AF (BPAF), are high production volume chemicals and potential endocrine disruptors. The oxidized manganese (Mn) species, soluble Mn(III) and solid Mn(IV) (i.e., MnO2), are typically generated in Mn-cycling driven by Mn-oxidizing bacteria and Mn-reducing bacteria. MnO2 is a strong oxidant capable of oxidizing a variety of organic contaminants including bisphenols. Soluble Mn(III) commonly occurs near oxic-anoxic interfaces and is an important environmental oxidant. Mn(III) is also associated with both biogenic and synthesized MnO2. However, the effect of Mn(III) on the degradation of …
Environmental Design And Optimization Of Modular Hydropower Plants, Colin Sasthav
Environmental Design And Optimization Of Modular Hydropower Plants, Colin Sasthav
Doctoral Dissertations
This research aimed to understand the pathways to cost-effective and sustainable low-head hydropower. Designing viable hydropower projects requires optimization across many economic, environmental, and social outcomes. However, existing run-of-river hydropower design models often focus on economic performance and customizing technologies for high-head diversion schemes. Standard modular hydropower is a new design approach that uses standardized rather than custom-designed technologies to achieve economies of scale. Oak Ridge National Laboratory established a conceptual outline for module classes based on functions, such as generation modules and fish passage modules, but further research was needed to identify how modules should be selected and operated …