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in subjects: "Hydrogen Peroxide"

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Chemical oxidation of volatile and semi-volatile organic compounds in soil

Subsurface contamination with fuel hydrocarbons or chlorinated hydrocarbons is prevalent throughout the Department of Energy (DOE) complex and in many sites managed by the Environmental Protection Agency (EPA) Superfund program. The most commonly reported chlorinated hydrocarbons (occurring > 50% of DOE contaminated sites) were trichloroethylene (TCE), 1, 1, 1,-trichloroethane (TCA), and tetrachloroethylene (PCE) with concentrations in the range of 0.2 {mu}g/kg to 12,000 mg/kg. The fuel hydroca… more

Date: June 1, 1995

Creator: Gates, D. D.; Siegrist, R. L. & Cline, S. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

CLOUD CHEMISTRY.

Clouds present substantial concentrations of liquid-phase water, which can potentially serve as a medium for dissolution and reaction of atmospheric gases. The important precursors of acid deposition, SO{sub 2} and nitrogen oxides NO and NO{sub 2} are only sparingly soluble in clouds without further oxidation to sulfuric and nitric acids. In the case of SO{sub 2} aqueous-phase reaction with hydrogen peroxide, and to lesser extent ozone, are identified as important processes leading to this oxid… more

Date: March 2001

Creator: Schwartz, S. E.

Item Type: Book

Partner: UNT Libraries Government Documents Department

open access

MINIMIZING DECOMPOSITION OF VAPORIZED HYDROGEN PEROXIDE IN CLEAN GALVANIZED STEEL DUCTING: IMPLICATIONS FOR BIOLOGICAL DECONTAMINATION

This work examined the behavior of vaporous hydrogen peroxide (VHP) in clean, room-scale galvanized steel (GS) and polyvinylchloride-coated steel air ducts, to understand how it might be used to decontaminate larger ventilation systems. VHP injected into the GS duct decreased in concentration along the length of the duct, whereas VHP concentrations in the polyvinylchloride coated duct remained essentially constant, suggesting that VHP decomposed at the GS surface. However, decomposition was red… more

Date: September 7, 2007

Creator: Verce, M F; Jayaraman, B; Ford, T D; Fisher, S E; Gadgil, A J & Carlsen, T M

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The corrosion of aluminum in dilute solutions: laboratory studies

After it had been decided that aluminum was to be used as a corrosion-resistant material with good heat transfer properties, it was desired to determine the operating conditions to be used in the water-cooled Handford plant in order to avoid danger of corrosion penetration of thin aluminum parts. The studies here reported were undertaken with the object of determining these conditions by investigating the effects of all the known variables which might influence the corrosion behavior of aluminu… more

Date: June 19, 1945

Creator: Draley, J. E.; Arendt, J. W.; English, G. C.; Story, E. F.; Wainscott, M. M. & Berger, R. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Downstream Impacts of Tank 48H In-tank and Out-of-tank Processing Alternatives

This document discusses a number of possible impacts that an in-tank or out-of-tank process may have on downstream processing facilities. The analysis is part of a task to develop processes to destroy tetraphenylborate using Fenton Chemistry (metal catalyst plus hydrogen peroxide). Two processes being evaluated are funded by a grant from DOE's National Energy Technology Center. The first is an in-tank process, where the tetraphenylborate is destroyed by decreasing the pH, increasing the tempera… more

Date: December 22, 2003

Creator: Lambert, D. P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Development of chemiresponsive sensors for detection of common homemade explosives.

Field-structured chemiresistors (FSCRs) are polymer based sensors that exhibit a resistance change when exposed to an analyte of interest. The amount of resistance change depends on the polymer-analyte affinity. The affinity can be manipulated by modifying the polymer within the FSCRs. In this paper, we investigate the ability of chemically modified FSCRs to sense hydrogen peroxide vapor. Five chemical species were chosen based on their hydrophobicity or reactivity with hydrogen peroxide. Of th… more

Date: May 1, 2012

Creator: Brotherton, Christopher M. & Wheeler, David Roger

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Peroxide process -- 234-5 Building

The mechanical line being developed at Los Alamos is designed around the peroxide precipitation process. Development work, at that site, on this process has progressed to the point where actual plant equipment can be designed for future use. The process for converting the peroxide to a reducible fluoride is known. From the reduction step on, no change is necessary in the present process. The possibilities of a satisfactory peroxide process were recognized before design and construction of the R… more

Date: October 11, 1949

Creator: Groswith, C. T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Advanced Oxidation Process

The removal of recalcitrant sulfur species, dibenzothiophene and its derivatives, from automotive fuels is an integral component in the development of cleaner burning and more efficient automobile engines. Oxidative desulfurization (ODS) wherein the dibenzothiophene derivative is converted to its corresponding sulfoxide and sulfone is an attractive approach to sulfur removal because the oxidized species are easily extracted or precipitated and filtered from the hydrocarbon phase. Fe-TAML{reg_si… more

Date: November 4, 2003

Creator: Horwitz, Colin P. & Collins, Terrence J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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RESULTS OF COPPER CATALYZED PEROXIDE OXIDATION (CCPO) OF TANK 48H SIMULANTS

Savannah River National Laboratory (SRNL) performed a series of laboratory-scale experiments that examined copper-catalyzed hydrogen peroxide (H{sub 2}O{sub 2}) aided destruction of organic components, most notably tetraphenylborate (TPB), in Tank 48H simulant slurries. The experiments were designed with an expectation of conducting the process within existing vessels of Building 241-96H with minimal modifications to the existing equipment. Results of the experiments indicate that TPB destructi… more

Date: August 14, 2012

Creator: Peters, T.; Pareizs, J.; Newell, J.; Fondeur, F.; Nash, C.; White, T. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The single-strand DNA binding activity of human PC4 preventsmutagenesis and killing by oxidative DNA damage

Human positive cofactor 4 (PC4) is a transcriptional coactivator with a highly conserved single-strand DNA (ssDNA) binding domain of unknown function. We identified PC4 as a suppressor of the oxidative mutator phenotype of the Escherichia coli fpg mutY mutant and demonstrate that this suppression requires its ssDNA binding activity. Yeast mutants lacking their PC4 ortholog Sub1 are sensitive to hydrogen peroxide and exhibit spontaneous and peroxide induced hypermutability. PC4 expression suppre… more

Date: February 1, 2004

Creator: Wang, Jen-Yeu; Sarker, Altaf Hossain; Cooper, Priscilla K. & Volkert, Michael R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Particle removal challenges with EUV patterned mask for the sub-22nm HP node

The particle removal efficiency (PRE) of cleaning processes diminishes whenever the minimum defect size for a specific technology node becomes smaller. For the sub-22 nm half-pitch (HP) node, it was demonstrated that exposure to high power megasonic up to 200 W/cm{sup 2} did not damage 60 nm wide TaBN absorber lines corresponding to the 16 nm HP node on wafer. An ammonium hydroxide mixture and megasonics removes {ge}50 nm SiO{sub 2} particles with a very high PRE, A sulfuric acid hydrogen perox… more

Date: March 12, 2010

Creator: Rastegar, A.; Eichenlaub, S.; Kadaksham, A. J.; Lee, B.; House, M.; Huh, S. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Interaction Between Titanium Implant Surfaces and Hydrogen Peroxide in Biologically Relevant Environments

Titanium was exposed to dilute solutions of hydrogen peroxide (H2O2) to better characterize the interaction at the interface between the solution and metal. The intensity of light passing through films of known thickness of titanium on quartz was measured as a function of time in contact with H{sub 2}O{sub 2} in concentrations of 0.3% and 1.0%. An atomic force microscope (AFM) was used to record deflection-distance (force) curves as a probe approached the interface of titanium in contact with s… more

Date: April 21, 2004

Creator: Muyco, J & Ratto, T

Item Type: Article

Partner: UNT Libraries Government Documents Department

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K Basin Sludge Conditioning Process Testing Fate of PCBs During K Basin Sludge Dissolution in Nitric Acid and with Hydrogen Peroxide Addition

The work described in this report is part of the studies being performed to address the fate of polychlorinated biphenyls (PCBs) in K Basin sludge before the sludge can be transferred to the Tank Waste Remediation System (TWRS) double shell tanks. One set of tests examined the effect of hydrogen peroxide on the disposition of PCBs in a simulated K Basin dissolver solution containing 0.5 M nitric acid/1 M Fe(NO{sub 3}){sub 3}. A second series of tests examined the disposition of PCBs in a much s… more

Date: January 4, 1999

Creator: Mong, G. M.; Schmidt, A. J.; Hoppe, E. W.; Pool, K. H.; Silvers, K. L. & Thornton, B. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Pilot-Scale Pressurized Base Hydrolysis of HMX Plastic-Bonded Explosives

A pilot-scale, pressurized, base hydrolysis reactor has been designed and its construction is nearly completed. Up to 120 L of 1--6 M NaOH aqueous solutions will convert as much as 25 kg of consolidated, explosive pieces to non-energetic compounds. Temperatures approaching 155 C in the pressurized unit will reduce reaction times significantly for the destruction of plastic-bonded explosives compared to previous atmospheric-pressure reactors. The hydrolysis effluent is then pumped into a holding… more

Date: December 31, 1998

Creator: Larson, Sheldon A.; Brewer, Gordon R.; Harradine, David M.; Polston, Clifford E.; Le, Loan A.; Bishop, Robert L. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Organic transformations catalyzed by methylrhenium trioxide

Methylrhenium trioxide (MTO), CH{sub 3}ReO{sub 3}, was first prepared in 1979. MTO forms stable or unstable adducts with electron-rich ligands, such as amines (quinuclidine, 1,4-diazabicyclo-octane, pyridine, aniline, 2,2{prime}-bipyridine), alkynes, olefins, 1,2-diols, catechols, hydrogen peroxide, water, thiophenols, 1,2-dithiols, triphenylphosphine, 2-aminophenols, 2-aminothiophenols, 8-hydroxyquinoline and halides (Cl-, Br-, I-). After coordination, different further reactions will occur fo… more

Date: November 1, 1995

Creator: Zhu, Z.

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

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Formation of gas-phase peroxides in a rural atmosphere: An interpretation of the recent SOS/SERON field results

Hydrogen perioxide (H{sub 2}O{sub 2}) and certain organic peroxides such as hydroxymethyl-hydroperoxide (HMHP), are gas-phase oxidants present in the atmosphere at ppbv concentration levels. These oxidants play an important role in atmospheric chemistry. In addition, precipitation containing H{sub 2}O{sub 2} is toxic to trees, and it has also been suggested that organic peroxides formed presumably by ozone reactions with biogenic alkenes are responsible for leaf disorders. Recently, we have dev… more

Date: September 1, 1993

Creator: Lee, J. H.; Tang, I. N. & Weinstein-Lloyd, J. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Modeling of aqueous chemistry in cloud droplets

The code AQCHEM.FOR, a listing of which is attached, has been prepared as a tool for the investigation of chemical reactions occurring in cloud drops. The present application is to the formation of sulfate (S(VI)) via reaction of S(IV) species with ozone and hydrogen peroxide. However, the model is constructed in a general format that allows introduction of other species and reactions easily. The model also stimulates mass transfer between the liquid and gas phases, so that the assumption of eq… more

Date: February 1, 1992

Creator: Kreidenweis, S. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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TESTING AND CHARACTERIZATION OF ENGINEERED FORMS OF MONOSODIUM TITANATE (MST)

Engineered forms of MST and mMST were prepared at ORNL using an internal gelation process. Samples of these two materials were characterized at SRNL to examine particle size and morphology, peroxide content, tapped densities, and Na, Ti, and C content. Batch contact tests were also performed to examine the performance of the materials. The {sup E}mMST material was found to contain less than 10% of the peroxide found in a freshly prepared batch of mMST. This was also evidenced in batch contact t… more

Date: May 14, 2012

Creator: Taylor-Pashow, K.; Nash, C. & Hobbs, D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Digestion of Crystalline Silicotitanate (CST)

Researchers tested methods for chemically dissolving crystalline silicotitanate (CST) as a substitute for mechanical grinding to reduce particle size before vitrification. Testing used the commercially available form of CST, UOP IONSIV(R) IE-911. Reduction of the particle size to a range similar to that of the glass frit used by the Defense Waste Processing Facility (DWPF) could reduce problems with coupling cesium ion exchange to the vitrification process. This study found that IONSIV(R) IE-91… more

Date: November 4, 2004

Creator: Walker, Darrel

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Pilot plant study - Phase I, Task 5. Topical report, September 1994--June 1995

The Department of Energy (DOE) is now faced with the task of meeting decontamination and decommissioning obligations at numerous facilities by the year 2019. Due to the tremendous volume of material involved, innovative decontamination technologies are being sought that can reduce the volumes of contaminated waste materials and secondary wastes requiring disposal. With sufficient decontamination, some of the material from DOE facilities could be released as scrap into the commercial sector for … more

Date: July 1, 1995

Item Type: Report

Partner: UNT Libraries Government Documents Department

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BNL Building 650 lead decontamination and treatment feasibility study. Final report

Lead has been used extensively at Brookhaven National Laboratory (BNL) for radiation shielding in numerous reactor, accelerator and other research programs. A large inventory of excess lead (estimated at 410,000 kg) in many shapes and sizes is currently being stored. Due to it`s toxicity, lead and soluble lead compounds are considered hazardous waste by the Environmental Protection Agency. Through use at BNL, some of the lead has become radioactive, either by contamination of the surface or thr… more

Date: October 1, 1995

Creator: Kalb, P. D.; Cowgill, M. G. & Milian, L. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Autonomous, agile micro-satellites and supporting technologies

This paper updates the on-going effort at Lawrence Livermore National Laboratory to develop autonomous, agile micro-satellites (MicroSats). The objective of this development effort is to develop MicroSats weighing only a few tens of kilograms, that are able to autonomously perform precision maneuvers and can be used telerobotically in a variety of mission modes. The required capabilities include satellite rendezvous, inspection, proximity-operations, docking, and servicing. The MicroSat carries… more

Date: July 19, 1999

Creator: Breitfeller, E; Dittman, M D; Gaughan, R J; Jones, M S; Kordas, J F; Ledebuhr, A G et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Ultrasonic process for detoxification of groundwater

In this paper, we present the results of an investigation of the ultrasonic irradiation of carbon tetrachloride at various pH values, temperatures, and power intensities. Kinetic data and selected chemical mechanism are discussed and proposed. To study oxidant efficiency, chemical oxidants, such as hydrogen peroxide, are also considered. This work is part of a project entitled ``Ultrasonic Process for Detoxification of Groundwater and Soil,`` sponsored by the US Department of Energy, Office of … more

Date: December 31, 1991

Creator: Wu, Jiann M.; Huang, H. S. & Livengood, C. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Data/model integration for vertical mixing in the stable Arctic boundary layer

This is the final report of a short Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). Data on atmospheric trace constituents and the vertical structure of stratus clouds from a 1996 expedition to the central Arctic reveal mechanisms of vertical mixing that have not been observed in mid-latitudes. Time series of the altitude and thickness of summer arctic stratus have been observed using an elastic backscatter lidar aboard an icebreaker. With t… more

Date: December 31, 1998

Creator: Barr, S.; ReVelle, D. O.; Kao, C. Y. J. & Bigg, E. K.

Item Type: Report

Partner: UNT Libraries Government Documents Department