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Full-Text Articles in Environmental Engineering
Mechanistic Insight Into The Degradation Of Nitrosamines Via Aqueous-Phase Uv Photolysis Or A Uv-Based Advanced Oxidation Process: Quantum Mechanical Calculations, Daisuke Minakata, Erica Coscarelli
Mechanistic Insight Into The Degradation Of Nitrosamines Via Aqueous-Phase Uv Photolysis Or A Uv-Based Advanced Oxidation Process: Quantum Mechanical Calculations, Daisuke Minakata, Erica Coscarelli
Department of Civil, Environmental, and Geospatial Engineering Publications
Nitrosamines are a group of carcinogenic chemicals that are present in aquatic environments that result from byproducts of industrial processes and disinfection products. As indirect and direct potable reuse increase, the presence of trace nitrosamines presents challenges to water infrastructures that incorporate effluent from wastewater treatment. Ultraviolet (UV) photolysis or UV-based advanced oxidation processes that produce highly reactive hydroxyl radicals are promising technologies to remove nitrosamines from water. However, complex reaction mechanisms involving radicals limit our understandings of the elementary reaction pathways embedded in the overall reactions identified experimentally. In this study, we perform quantum mechanical calculations to identify the …
Reviews And Syntheses: Ocean Acidification And Its Potential Impacts On Marine Ecosystems, Khan M.G. Mostofa, Cong-Qiang Liu, Weidong Zhai, Marco Minella, David Vione, Kunshan Gao, Daisuke Minakata, Et.Al
Reviews And Syntheses: Ocean Acidification And Its Potential Impacts On Marine Ecosystems, Khan M.G. Mostofa, Cong-Qiang Liu, Weidong Zhai, Marco Minella, David Vione, Kunshan Gao, Daisuke Minakata, Et.Al
Department of Civil, Environmental, and Geospatial Engineering Publications
Ocean acidification, a complex phenomenon that lowers seawater pH, is the net outcome of several contributions. They include the dissolution of increasing atmospheric CO2 that adds up with dissolved inorganic carbon (dissolved CO2, H2CO3, HCO3−, and CO32−) generated upon mineralization of primary producers (PP) and dissolved organic matter (DOM). The aquatic processes leading to inorganic carbon are substantially affected by increased DOM and nutrients via terrestrial runoff, acidic rainfall, increased PP and algal blooms, nitrification, denitrification, sulfate reduction, global warming (GW), and by atmospheric CO2 itself through enhanced photosynthesis. They are consecutively associated with enhanced ocean acidification, hypoxia in acidified …