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 16 of 16 for “"dinitrotoluene"”.
-
Biological transformation of 2,4-dinitrotoluene under denitrifying conditions
The anoxic biotransformation of 2,4-dinitrotoluene (DNT) was evaluated. Two denitrifying enrichment cultures were developed, one with inoculum from the biological treatment plant at Radford Army Ammunition Plant (RAAP), which was acclimated to treatment of DNT munitions wastes, the other derived …
-
Biodegradation of 2,4-Dinitrotoluene in the Waste Streams of a Munitions Plant
… of propellants typically contains 2,4-dinitrotoluene (DNT), a suspected animal carcinogen. Previous studies have indicated that DNT is aerobically biodegradable. However, inconsistent removal of DNT during aerobic treatment has been observed at a munitions wastewater treatment plant, …
-
Chromatographic and mass spectrometric characterization of a landfill leachate and an industrial wastewater
… from 48% for a benzenesulfonamide to 96% for 2,4-dinitrotoluene. Liquid chromatography/mass spectrometry (LC/MS) techniques were utilized in conjunction with gas chromatography/mass spectrometry (GC/MS) and liquid chromatography with a diode array detector (LC/DAD), to identify specific organic …
-
Solid phase microextraction of amino-dinitrotoluenes in tissue.
… predominantly transforms to 2ADNT (2-amino-4,6-dinitrotoluene) and 4ADNT (4-amino-2,6-dinitrotoluene) in environmental matrixes and tissues. Solid phase microextraction (SPME) was used to extract ADNTs (amino-dinitrotoluenes) from tissue as a potential method to investigate the recalcitrance of …
-
Light Enhanced Toxic/tumorigenic Potential of Trinitrotoluene (Tnt) and Analogs
The acute toxicity of TNT, 2-amino,-4,6-dinitrotoluene (2A) and 4-amino,-2,6-dinitrotoluene (4A) to Photobacterium phosphoreum (Microtox reagent), Daphnia magna (daphnia), and Dugesia dorotocephala (planaria) was enhanced by near-ultraviolet light (nUV) coexposure. The light enhanced toxicity of …
-
Coupled solid phase extraction-supercritical fluid extraction on-line gas chromatography of explosives from water
… quantitative extraction of nitrotoluenes (2,6-dinitrotoluene, 2,4-dinitrotoluene, and trinitrotoluene) from water. Three types of solid sorbents were investigated: two 47 mm Empore disks™ - octadecylsilane (C18) and styrene-divinylbenzene (SDVB); and one Bakerbond spe*™ Phenyl stationary phase. …
-
An explosive vapor generator based on capillary gas chromatography
… has been successfully used to produce vapors of dinitrotoluene (DNT), trinitrotoluene (TNT), and 1,3,5-trinitro-1,3,5- triazacyclohexane (RDX). The chemical composition of the output was confirmed by both ion mobility spectrometry, and quadrupole mass spectrometry. Adsorptive effects of TNT and …
-
Biodegradability of nitroxylene isomers
… contaminated site with high levels of dinitrotoluene (DNT), trinitrotoluene (TNT) and dinitroxylene (DNX) and used as the inoculum for microcosm tests. The microcosm method of different isomers was based on the previous work on biodegradation of nitrotoluene. As it was demonstrated …
-
Synthesis and Properties of Chemically Modified Carbon Nanotubes
… 2-nitrophenol, 2-nitrosotoluene and 2,4-dinitrotoluene with a detection limit of ca. 10-8 M. The modified SWNTs were further characterised using FTIR, XPS, TGA-MS and optical microscopy.
-
The Detection and Identification of Explosives by Canines and Chemical Instrumentation
… interest in this study were nitroglycerin, 2,4- dinitrotoluene, diphenylamine, ethyl centralite, and di-n-butyl phthalate. Concentration changes between pre- and post-blast smokeless powder particles were determined as well as microscopic differences between pre- and post-blast debris for both …
-
Intense laser matter interactions for explosives detection and tunable spectral blueshift
… detected the explosive signature molecule dinitrotoluene (DNT) on both metallic and dielectric substrates. Systematic investigations reveal that the optimal laser pulse energy for sampling DNT on metal substrates is lower than that on dielectric substrates. To quantify the DNT response, the …
-
Improving Detection and Identification Methods for Volatile Organic Explosives
… 2,3-dimethyl-2,3-dinitrobutane (DMDNB), 2,4-dinitrotoluene (DNT), and 1,3-dinitrobenzene (DNB) were identified as the most significant VOCs and subsequently used in the final stage of this project to compare the chemical detection methods with biological detection methods. Accredited …
-
Volatile Organic Compound Detection And Disease Diagnostics Using Dna-Functionalized Carbon Nanotube Sensor Arrays
… specificity, and longevity using mixtures of 2,6-dinitrotoluene (DNT) and dimethyl methylphosphonate (DMMP) to simulate complex VOC environments. The sensors demonstrated sensitivity to parts-per-billion concentrations of DNT in a highly concentrated background of DMMP. Moreover, the shelf life of …
-
Development and Application of Non-Traditional Vertebrate Models to Investigate Terrestrial Ecological Risk to 2,46-Trinitrotoluene Exposure
… with the primary reduction products, 2-amino-4,6-dinitrotoluene and 4-amino, 2,6-dinitrotoulene reaching higher concentrations than of parent compound. Other TNT metabolites were found in insignificant quantities. The concentrations of PCBs were higher in the oral treatment, as expected. These …
-
Investigation of temperature effects on subsurface attenuation of nitroaromatic compounds
… 1,3-dinitrobenzene (up to 216 mg/L), 2,4-dinitrotoluene (up to 163 mg/L), and 1,2-chloronitrobenzene (up to 91 mg/L). Comparison of organic carbon in detected contaminants with total organic carbon revealed that there were no other organic contaminants at relevant concentrations in the …
-
Elucidating the Role of Toxin-Induced Microbial Stress Responses in Biological Wastewater Treatment Process Upset
… (CDNB), N-ethylmaleimide (NEM), 2,4-dinitrotoluene (DNT), 1,4-benzoquinone (BQ), and Cd2+ to a bench-scale sequencing batch reactor (SBR) system. In most cases, the stressor chemicals caused significant deflocculation, as measured by an increase in effluent volatile suspended solids …