Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Institution
- Keyword
-
- Atmospheric chemistry (7)
- Chemistry and Biochemistry (7)
- Emissions (7)
- Pollutants (7)
- Biomass burning (2)
-
- Biomass fires (2)
- Gases (2)
- Nevada – Yucca Mountain (2)
- Particles (2)
- Savanna fires (2)
- Smoke (2)
- Aerosols (1)
- California – Inyo County (1)
- Carbon steel – Corrosion (1)
- Constructed wetlands--United States--Wright-Patterson Air Force Base (Ohio) (1)
- DDT (Insecticide)--Reactivity; Oxidation-reduction reaction; (1)
- Emissions from fires (1)
- Evolution of smoke (1)
- Geochemistry (1)
- Geology (1)
- Groundwater – Monitoring (1)
- Groundwater--Pollution (1)
- Monitoring wells (1)
- Nevada – Nye County (1)
- Nitrates (1)
- Ocean (1)
- Organic compounds (1)
- Organics (1)
- Oxidation-reduction reaction (1)
- Particle emissions (1)
- Publication
- Publication Type
- File Type
Articles 1 - 20 of 20
Full-Text Articles in Environmental Chemistry
Development And Optimization Of Hplc-Icpms For The Determination Of Iodine Speciation In Groundwater, Yun Qiu
Development And Optimization Of Hplc-Icpms For The Determination Of Iodine Speciation In Groundwater, Yun Qiu
All-Inclusive List of Electronic Theses and Dissertations
High performance liquid chromatography has been coupled with online inductively coupled plasma mass spectrometry detection for the determination of iodine speciation in drinking and groundwaters. Using ion exchange chromatography, the method is applied to quantify the concentrations of iodine species in groundwaters. The HPLC-UV detection was used first to examine the separation efficiency of the HPLC method. The limit of quantification was obtained for the HPLC-UV analysis. Direct ICPMS analysis of iodine species has been validated and optimized using an HC03"/C03 2 - aqueous solvent. HPLC was then interfaced to the ICPMS T-shape connection to allow online addition of internal …
Support For The Nye County Early Warning Drilling Program, Irene Farnham, Klaus J. Stetzenbach, Amy J. Smiecinski
Support For The Nye County Early Warning Drilling Program, Irene Farnham, Klaus J. Stetzenbach, Amy J. Smiecinski
Publications (YM)
This final report details the activities completed for Task 8 of the University and Community College System of Nevada (UCCSN) Cooperative Agreement with the US Department of Energy (DOE). Task 8, titled "Support for the Nye County Early Warning Drilling Program" provided for a variety of hydrochemical analyses. The requirements of the University and Community College System of Nevada (UCCSN) Quality Assurance (QA) Program were followed for all work performed on this task. The primary activity performed by the Harry Reid Center for Environmental Studies (HRC) for Task 8 was to provide hydrochemical analyses of the groundwater samples collected from …
Acid-Base Properties Of Aluminum In A Hardwood Forest Soil (Or: Acid Rain Is Dead…), Chris E. Johnson
Acid-Base Properties Of Aluminum In A Hardwood Forest Soil (Or: Acid Rain Is Dead…), Chris E. Johnson
Civil and Environmental Engineering - All Scholarship
No abstract provided.
Redox Scale For Assigning An Oxidizing/Reducing Potential To Groundwater: Method Development And Initial Results, Julie Bertoia, Vernon Hodge, Klaus J. Stetzenbach, Amy J. Smiecinski
Redox Scale For Assigning An Oxidizing/Reducing Potential To Groundwater: Method Development And Initial Results, Julie Bertoia, Vernon Hodge, Klaus J. Stetzenbach, Amy J. Smiecinski
Publications (YM)
This report outlines the progress on Task 33 of the Department of Energy's Yucca Mountain Cooperative Agreement with the University and Community College System of Nevada (UCCSN). The task is titled "The Experimental Determination of a "Redox Scale" for Assigning an Oxidizing/Reducing Potential to Groundwater from Wells in the Nye County Early Warning Drilling Program: A Scale for Predicting the Solubility and Mobility of Elements Commonly Found in Nuclear Wastes". The purpose of the research was to determine the concentrations of the various electrochemical oxidation states or redox species of eleven elements in groundwater samples collected from the Nye County …
Corrosion And Mass Transport Processes In Carbon Steel Miniature Waste Packages, James Cizdziel, Kaveh Zarrabi, Susan Lestrange, Amy J. Smiecinski
Corrosion And Mass Transport Processes In Carbon Steel Miniature Waste Packages, James Cizdziel, Kaveh Zarrabi, Susan Lestrange, Amy J. Smiecinski
Publications (YM)
In this study, we have systematically investigated corrosion and mass transport processes in carbon steel miniature waste packages (MWP) in dynamic systems (water in, water out) under varying chemical conditions. The MWP were fabricated to have similar configuration to the DOE Spent Nuclear Fuel (SNF) waste package and that individual components to be in scale with each other compare to the SNF waste package. Two MWP configurations were studied: a "bathtub" model and a "flow-through" model. By slowly dripping 4 different solutions (groundwater obtained from well water J-13 located near Yucca Mountain, and J-13 water adjusted to low-pH, high-salinity, and …
Distributions Of Trace Gases And Aerosols During The Dry Biomass Burning Season In Southern Africa, Parikhit Sinha, Peter V. Hobbs, Robert J. Yokelson, Donald R. Blake, Song Gao, Thomas W. Kirchstetter
Distributions Of Trace Gases And Aerosols During The Dry Biomass Burning Season In Southern Africa, Parikhit Sinha, Peter V. Hobbs, Robert J. Yokelson, Donald R. Blake, Song Gao, Thomas W. Kirchstetter
Chemistry and Physics Faculty Articles
Vertical profiles in the lower troposphere of temperature, relative humidity, sulfur dioxide (SO2), ozone (O3), condensation nuclei (CN), and carbon monoxide (CO), and horizontal distributions of twenty gaseous and particulate species, are presented for five regions of southern Africa during the dry biomass burning season of 2000. The regions are the semiarid savannas of northeast South Africa and northern Botswana, the savanna-forest mosaic of coastal Mozambique, the humid savanna of southern Zambia, and the desert of western Namibia. The highest average concentrations of carbon dioxide (CO2), CO, methane (CH4), O3, …
Emissions Of Trace Gases And Particles From Savanna Fires In Southern Africa, Parikhit Sinha, Peter V. Hobbs, Robert J. Yokelson, Isaac T. Bertschi, Donald R. Blake, Isobel J. Simpson, Song Gao, Thomas W. Kirchstetter, Tihomir Novakov
Emissions Of Trace Gases And Particles From Savanna Fires In Southern Africa, Parikhit Sinha, Peter V. Hobbs, Robert J. Yokelson, Isaac T. Bertschi, Donald R. Blake, Isobel J. Simpson, Song Gao, Thomas W. Kirchstetter, Tihomir Novakov
Chemistry and Physics Faculty Articles
Airborne measurements made on initial smoke from 10 savanna fires in southern Africa provide quantitative data on emissions of 50 gaseous and particulate species, including carbon dioxide, carbon monoxide, sulfur dioxide, nitrogen oxides, methane, ammonia, dimethyl sulfide, nonmethane organic compounds, halocarbons, gaseous organic acids, aerosol ionic components, carbonaceous aerosols, and condensation nuclei (CN). Measurements of several of the gaseous species by gas chromatography and Fourier transform infrared spectroscopy are compared. Emission ratios and emission factors are given for eight species that have not been reported previously for biomass burning of savanna in southern Africa (namely, dimethyl sulfide, methyl nitrate, five …
Evolution Of Gases And Particles From A Savanna Fire In South Africa, Peter V. Hobbs, Parikhit Sinha, Robert J. Yokelson, Ted J. Christian, Donald R. Blake, Song Gao, Thomas W. Kirchstetter, Tihomir Novakov, Peter Pilewskie
Evolution Of Gases And Particles From A Savanna Fire In South Africa, Peter V. Hobbs, Parikhit Sinha, Robert J. Yokelson, Ted J. Christian, Donald R. Blake, Song Gao, Thomas W. Kirchstetter, Tihomir Novakov, Peter Pilewskie
Chemistry and Physics Faculty Articles
Airborne measurements of particles and gases from a 1000-ha savanna fire in South Africa are presented. These measurements represent the most extensive data set reported on the aging of biomass smoke. The measurements include total concentrations of particles (CN), particle sizes, particulate organic carbon and black carbon, light-scattering coefficients, downwelling UV fluxes, and mixing ratios for 42 trace gases and 7 particulate species. The ratios of excess nitrate, ozone, and gaseous acetic acid to excess CO increased significantly as the smoke aged over ∼40–45 min, indicating that these species were formed by photochemistry in the plume. For 17 other species, …
Water-Soluble Organic Components In Aerosols Associated With Savanna Fires In Southern Africa: Identification, Evolution, And Distribution, Song Gao, Dean A. Hegg, Peter V. Hobbs, Thomas W. Kirchstetter, Brian I. Magi, Martin Sadilek
Water-Soluble Organic Components In Aerosols Associated With Savanna Fires In Southern Africa: Identification, Evolution, And Distribution, Song Gao, Dean A. Hegg, Peter V. Hobbs, Thomas W. Kirchstetter, Brian I. Magi, Martin Sadilek
Chemistry and Physics Faculty Articles
During the SAFARI 2000 field campaign, both smoke aerosols from savanna fires and haze aerosols in the boundary layer and in the free troposphere were collected from an aircraft in southern Africa. These aerosol samples were analyzed for their water-soluble chemical components, particularly the organic species. A novel technique, electrospray ionization-ion trap mass spectrometry, was used concurrently with an ion chromatography system to analyze for carbohydrate species. Seven carbohydrates, seven organic acids, five metallic elements, and three inorganic anions were identified and quantified. On the average, these 22 species comprised 36% and 27% of the total aerosol mass in haze …
Analysis Of Anion Distributions In The Developing Strata Of A Constructed Wetland Used For Chlorinated Ethene Remediation, Joshua D. Kovacic
Analysis Of Anion Distributions In The Developing Strata Of A Constructed Wetland Used For Chlorinated Ethene Remediation, Joshua D. Kovacic
Theses and Dissertations
Perchloroethene (PCE), Trichloroethene (TCE) and their degradation products are among the most common organic groundwater contaminants in the United States. Constructed wetlands utilizing upward flow harbor reduction-oxidation conditions that have demonstrated the potential to promote both partial and total mineralization of PCE and TCE through the process of natural attenuation. Organic acid and inorganic anion concentrations are indicative of reduction-oxidation processes that drive chlorinated ethene degradation. These analytes were investigated to assess their development within three vertically stratified regions of a constructed wetland cell at Wright-Patterson Air Force Base fed by groundwater contaminated with PCE and TCE. Data collected during …
Modeling And Design Of Polythiophene Gate Electrode Chemfets For Environmental Pollutant Sensing, T. V. Krishna, Jeffrey R. Jessing, Dale D. Russell, Jonathan Scaggs, Lisa R. Warner, Joe A. Hartman
Modeling And Design Of Polythiophene Gate Electrode Chemfets For Environmental Pollutant Sensing, T. V. Krishna, Jeffrey R. Jessing, Dale D. Russell, Jonathan Scaggs, Lisa R. Warner, Joe A. Hartman
Chemistry and Biochemistry Faculty Publications and Presentations
Water-borne pollutants such as volatile organic compounds are a serious environmental concern, which has increased the demand for chemical sensing elements. Solidstate sensors based on catalytic gate devices are a subject of current research, however they are restricted in practical applications because of their inability to operate at room temperature. Conducting polymer FETs, which employ a conducting gate polymer, have received much attention due to their unique electronic and optical properties. Polythiophene is chosen as the semi-conductive gate polymer in this work. A functional group attached to the polythiophene is used to detect analytes (i.e., mercury in this work) of …
The Redox Potential Of Ddt: An Environmental Perspective, Anne Lewis, Christopher Cramer, John Bumpus
The Redox Potential Of Ddt: An Environmental Perspective, Anne Lewis, Christopher Cramer, John Bumpus
Presidential Scholars Theses (1990 – 2006)
Due to their low water solubility, the reduction potentials of DDT and dicofol are difficult to determine experimentally. Through computational methods, we calculated the one and two electron reduction potentials for DDT as 0.51 V and 0.67 V, respectively, and those for dicofol were 0.50 V and 0.74 V. This study is significant because we are able to calculate reliable redox potentials that may be utilized to predict chemical behavior and degradation pathways of environmental pollutants. To assess the accuracy of theoretical chemistry, we compared experimental and computational data and examined whether our calculated redox potentials fit with the known …
The Aqueous Phase Yield Of Alkyl Nitrates From Roo+No: Implications For Photochemical Production In Seawater, Elizabeth E. Dahl, Eric S. Saltzman, Warren J. De Bruyn
The Aqueous Phase Yield Of Alkyl Nitrates From Roo+No: Implications For Photochemical Production In Seawater, Elizabeth E. Dahl, Eric S. Saltzman, Warren J. De Bruyn
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Alkyl nitrates have been observed in remote oceanic regions of the troposphere and in the surface ocean. The mechanism for their production in the oceans is not known. A likely source is the reaction of ROO + NO (where R is an alkyl group). Steady-state laboratory experiments show that alkyl nitrates are produced in the aqueous phase via this reaction, with branching ratios of 0.23 +/- 0.04, 0.67 +/- 0.03, and 0.71 +/- 0.04 for methyl, ethyl, and propyl nitrate respectively. The branching ratios in aqueous solution are significantly higher than in the gas phase. Irradiation of surface seawaters yield …
A Five-Channel, Single Detector, Emission Rmote Sensor (Presentation), Mitchell J. Williams, Donald H. Stedman, Gary A. Bishop, Richard W. Quine
A Five-Channel, Single Detector, Emission Rmote Sensor (Presentation), Mitchell J. Williams, Donald H. Stedman, Gary A. Bishop, Richard W. Quine
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Remote Sensing Of Automobile Emissions In The Chicago Area: Year 5, September 2002, Gary A. Bishop, Mitchell J. Williams, Daniel A. Burgard, Donald H. Stedman
On-Road Remote Sensing Of Automobile Emissions In The Chicago Area: Year 5, September 2002, Gary A. Bishop, Mitchell J. Williams, Daniel A. Burgard, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
Feat Standard Operating Procedures, Donald H. Stedman, Gary A. Bishop
Feat Standard Operating Procedures, Donald H. Stedman, Gary A. Bishop
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Remote Sensing Of Automobile Emissions In The Phoenix Area: Year 4, November 2002, Gary A. Bishop, Daniel A. Burgard, Mitchell J. Williams, Donald H. Stedman
On-Road Remote Sensing Of Automobile Emissions In The Phoenix Area: Year 4, November 2002, Gary A. Bishop, Daniel A. Burgard, Mitchell J. Williams, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Remote Sensing Of Automobile Emissions In The Labrea Area: Year 2, Mitchell J. Williams, Gary A. Bishop, Donald H. Stedman
On-Road Remote Sensing Of Automobile Emissions In The Labrea Area: Year 2, Mitchell J. Williams, Gary A. Bishop, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.
Feat Monochromater User's Guide, Gary A. Bishop
Feat Monochromater User's Guide, Gary A. Bishop
Fuel Efficiency Automobile Test Publications
No abstract provided.
On-Road Remote Sensing Of Automobile Emissions In The Denver Area: Year 4, January 2003, Daniel A. Burgard, Gary A. Bishop, Mitchell J. Williams, Donald H. Stedman
On-Road Remote Sensing Of Automobile Emissions In The Denver Area: Year 4, January 2003, Daniel A. Burgard, Gary A. Bishop, Mitchell J. Williams, Donald H. Stedman
Fuel Efficiency Automobile Test Publications
No abstract provided.