Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 10 of 10 for “"Nitrosodimethylamine (NDMA)"”.
-
Effect of bromide ion on the formation of N-nitrosodimethylamine (NDMA) in waters treated with monochloramine
… the effect of bromide on the formation of N-nitrosodimethylamine (NDMA) in chloraminated waters; (ii) to test different active bromine compounds in order to determine if they lead to the direct formation of NDMA as a result of reacting with an NDMA precursor; (iii) to develop a kinetic model …
-
Biofilm-related Materials as Total N-nitrosamine (TONO) Precursors and Hydroxylamine-based Interferences in TONO and N-nitrosodimethylamine (NDMA) Measurements
… suitable solvent for the SPE-TONO assay, with N-nitrosodimethylamine (NDMA) losses estimated to be 30% by SPE alone and an additional 15% from concentration of the methanol extracts by N2-gas blowdown. Three biofilm-derived materials - poly-N-acetylglucosamine (PNAG), Pseudomonas aeruginosa, and …
-
Ecological method development for detecting N-nitrosodimethylamine in water using HPLC-PDAD
… detect sub-parts per billion concentrations of N-nitrosodimethylamine (NDMA) in drinking water and environmental water samples. This presents a practical and “green” option to analytical methods that require laborious derivatization, expensive detectors and unecological solvents.</p> <p>Mobile …
-
Improvements to Polyamide Reverse Osmosis Membranes for Removal of Small, Neutral, Hydrophilic Solutes
… to SNHs, particularly the carcinogen N-nitrosodimethylamine (NDMA). To do this, commercial RO membranes were modified using a variety of methods, the most successful of which was surface bonding of graphene oxide (GO) nanosheets. On average, membranes modified with GO nanosheets reduced …
-
Balancing Bromate Formation, Organics Oxidation, and Pathogen Inactivation: The Impact of Bromate Suppression Techniques on Ozonation System Performance in Reuse Waters
… through the surrogate 1,4-dioxane, and N-nitrosodimethylamine (NDMA) formation. Additionally, bromate suppression mechanisms of monochloramine were explored further through a variety of different water quality parameters, such as through hydroxyl radical exposure and ultraviolet absorption …
-
Navigating the Unregulated: A Multi-Tiered Public Health Risk Assessment of PFAS and N-DBPs Utilizing Unregulated Contaminant Monitoring Rule Data
… orders of magnitude. For carcinogenic risk, N-Nitrosodimethylamine (NDMA) and N-Nitrosodiethylamine (NDEA) were the primary drivers among N-DBPs. PFOA presented the highest risk among PFAS, despite sharing the same chain length with PFOS. This study yields three primary conclusions: (1) …
-
Cytotoxicity and Mutagenicity of Disinfection Byproduct Mixtures Formulated Using Free Chlorine and Monochloramine
… were identified and quantified. Exogenous N-nitrosodimethylamine (NDMA) was added to two monochloramine-derived concentrates because the NOM did not include precursors for this known human carcinogen that forms in chloraminated waters. Five synthetic DBP analog mixtures were formulated based …
-
Ndma Formation During Chloramination: Temporospatial Distribution Of Ndma Precursors, The Effect Of Lime Softening Treatment, And Precursor Identification Via Non-Targeted Analysis
N-nitrosodimethylamine (NDMA), a byproduct formed in drinking water during chloramination disinfection, is notorious both for its potent carcinogenicity and toxicity. NDMA and other nitrosamine precursors are compounds containing secondary, tertiary, and quaternary amines, which can be released …
-
Development of sustainable Pd-based catalysts for removal of persistent contaminants from drinking water
… and diatrizoate significantly but not N-nitrosodimethylamine (NDMA) with a variety of Pd-based catalysts. Nitrate was selected as a probe contaminant, and several different azo dyes (i.e., (methyl orange, methyl red, fast yellow AB, metanil yellow, acid orange 7, congo red, eriochrome …
-
Fundamental and Practical Aspects of Cometabolite Addition for 1,4-Dioxane Removal in Biofiltration
… total organic carbon removal or the removal of N-Nitrosodimethylamine (NDMA), a nitrogenous disinfection by product produced in upstream ozonation. BAC, with or without propane amendment, was found to be effective for the removal of low molecular weight organics produced in ozone, such as acetone, …