DOCSLIB.ORG

Report No. REC-ERC-84-8, “Oxidation of Formaldehyde

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Report No. REC-ERC-84-8, “Oxidation of Formaldehyde REC-ERC-84-8 December 1984 Engineering and Research Center U. S. Department of the Interior Bureau of Reclamation 7-2090 (4.61) Bureau of Redsmat ZPORT STANDARD TITLE PAGE 3. RECIPIENT’S CATALOG NO. 5. REPORT DATE Oxidation of Formaldehyde Solutions December 1984 Used for the Preservation of Reverse 6. PERFORMING ORGANIZATION CODE Osmosis Membranes D-l 523C 7. AUTHOR(S) 9. PERFORMING ORGANIZATION REPORT NO. W. J. Boegli, A. P. Murphy, and M. K. Price REC-ERC-84-8 9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. WORK UNIT NO. Bureau of Reclamation Engineering and Research Center Il. CONTRACT OR GRANT NO. Denver, Colorado 80225 13. TYPE OF REPORT AND PERIOD COVERED -2. SPONSORING AGENCY NAME AND ADDRESS Same 14. SPONSORING AGENCY CODE DIBR 5. SUPPLEMENTARY NOTES Microfiche and/or hard copy available at the Engineering and Research Center, Denver, CO Ed: JC 6. ABSTRACT This report presents the results of an experimental study of a new process for the catalytic oxidation, at ambient temperatures, of dilute formaldehyde used in aqueous solutions for the preservation of cellulose acetate reverse osmosis membranes. The oxidation, involving hydrogen peroxide and an iron (ferric chloride) catalyst, was first tested in a bench-scale adiabatic reactor to develop operating curves for several concentrations of formaldehyde and to show the total oxidation time as a function of selected variables. These variables included initial solution temperature, reactant concentration, stirring rate, and the type of purge gas used above the reaction. In a subsequent series of tests, isothermal data were generated for fitting a temperature and concentration-dependent rate equation. The reaction, which proceeds by formic acid production, was shown to be effective in completely oxidizing formaldehyde solutions at concentrations at, or greater than, 250 mg/L to carbon dioxide and water (with formaldehyde vapor detected in the product gas stream at less than 0.4 mg/m3). The oxidation was found to be rate rather than mass diffusion controlled and, based on chemical similitude considerations, can be scaled up directly. Based on the results of the study, recommendations are made for the design and operation of a full-scale reactor for the Yuma Desalting Plant (now being constructed for the Bureau of Reclamation at Yuma, Arizona). An estimate is also provided for the cost of chemicals used in oxidizing a single flushing from a control block (45 000 L) at an assumed concentration of 1200 mg/L. 17. KEY WORD5 AND DOCUMENT ANALYSlS o. DESCRIPTORS-- *desalination/ *reverse osmosis membranes/ ion exchange/ water pu- rification/ *water treatment/ *formaldehyde oxidation/ formaldehyde disposal/ *membrane preservation/ cellulose acetate membranes/ bacteriostat/ pesticide/ organic oxidation b. IDENTIF/ERS-- Yuma Desalting Test Facility, Arizona/ l Yuma Desalting Plant/ Wellton-Mohawk Irrigation District/ c. COSATI Field/Group 13B COWRR: 1302.5 SR IM: 16. DISTRIBUTION STATEMENT 19. SECURITY CLASS -21. NO. OF PAGE (THIS REPORT) Available from the National Technical Information Service, Operations UNCLASSIFIED 57 Division, 5285 Port Royal Road, Springfield, Virginia 22161. 20. SECURITY CLASS 22. PRICE (Microfiche and/or hard copy available from NTIS) (THIS PAGE) UNCLASSIFIED REC-ERC-84-8 OXIDATION OF FORMALDEHYDE SOLUTIONS USED FOR THE PRESERVATION OF REVERSE OSMOSIS MEMBRANES W. J. Boegli A.P. Murphy M.K. Price December 1984 Applied Sciences Branch Division of Research and Laboratory Services Engineering and Research Center SI METRIC Denver, Colorado UNITED STATES DEPARTMENT OF THE INTERIOR * BUREAU OF RECLAMATION ACKNOWLEDGMENTS The authors would like to thank Dr. John Vaughn, Professor of Chemistry, Colorado State University, for his helpful suggestions on kinetics; and Ken Williams, Chemist, U.S. Army Environmental Hygiene Agency, Aberdeen Proving Ground, Maryland, for providing operating conditions for the formaldehyde analysis by ion chromatog- raphy. As the Nation’s principal conservation agency, the Department of the Interior has responsibility for most of our nationally owned public lands and natural resources. This includes fostering the wisest use of our land and water resources, protecting our fish and wildlife, preserv- ing the environmental and cultural values of our national parks and historical places, and providing for the enjoyment of life through out- door recreation. The Department assesses our energy and mineral resources and works to assure that their development is in the best interests of all our people. The Department also has a major respon- sibility for American Indian reservation communities and for people who live in Island Territories under U.S. Administration. The research covered by this report was funded jointly by the Bureau’s Lower Colorado Regional Office and the Office of Water Research. I The information contained -in this report regarding commercial prod- ucts or firms may not be used for advertising or promotional purposes and is not to be construed as an endorsement of any product or firm by the Bureau of Reclamation. Page Summary .................................................................................................................................. 1 Introduction ............................................................................................................................... 1 The impact of FIFRA .............................................................................................................. 1 Formaldehyde disposal methods ............................................................................................. 1 Adiabatic testing ....................................................................................................................... Beaker tests.. ........................................................................................................................ : Matrix tests ........................................................................................................................... 5 Further testing at standard conditions ..................................................................................... 12 Other considerations of the reaction ........................................................................................ 16 Studies of parameters kept constant in the matrix tests ........................................................... 18 Isothermal: testing ...................................................................................................................... 23 Experimental apparatus and procedure .................................................................................... 23 Results and discussion ........................................................................................................... 27 Design data for the Yuma Desalting Plant.. .................................................................................. Thermodynamics for the known oxidations.. ............................................................................ :: Scale-up ................................................................................................................................ 30 Flushing and disposal of formaldehyde solutions ...................................................................... 32 Conclusions and recommendations ............................................................................................. 32 Bibliography .............................................................................................................................. 33 APPENDIXES Appendix A Ion chromatography ...................................................................................................... 35 1 Formaldehyde analysis by IC ................................................................................. 2 Formate detection ............................................................................................... SE 3 IC chromatogram ................................................................................................. 4 Water contamination ........................................................................................... 1: 5 Daily operation of the IC.. ..................................................................................... 38 Reliability of analytical procedures .................................................................................. 41 G Calculations ................................................................................................................. 43 1 Gas chromatography ............................................................................................ 43 2 Percent carbon from 14C ...................................................................................... 43 3 Formaldehyde and formate ................................................................................... 43 D Assaying stock formaldehyde solutions .......................................................................... 45 E Carbon-l 4 formaldehyde and methyl alcohol .................................................................. 47 Thermodynamics .......................................................................................................... 49 L Power input ................................................................................................................. 53 H Formaldehyde flushing and disposal ............................................................................... 55 I Cost of process ..........................................................................................................
Load more

Recommended publications
  • Trimethylacetic Formic Anhydride Precipitation from Ethanol and Diethyl Ether, M.P
    PDF hosted at the Radboud Repository of the Radboud University Nijmegen The following full text is a publisher's version. For additional information about this publication click this link. http://hdl.handle.net/2066/16408 Please be advised that this information was generated on 2021-09-24 and may be subject to change. 460 Edward J. Vlietsira et al. / Trimethylacetic formic anhydride precipitation from ethanol and diethyl ether, m.p. 240°C (dec.); Acknowledgements [a]5 5 —140° (c 1.0, water). MS: M* 700. We thank Mr. P. Kranenburg for valuable technical as­ N-(6,14-endo-Etheno-7,8-dihydromorphine-7ai-carbonyl)-L- sistance and Messrs. J. A. de Groot, L. J. M. Helvensteijn -phenylalanyl-L-leucinol (14) and E. F. Lameijer for carrying out preliminary experi­ The hydrochloride of 12 (1.63 g, 2.4 mmol) was converted into the ments. We are grateful to the Management of Diosynth base and dissolved in 30 ml of anhydrous 2-propanol. To this B. V., Apeldoorn, The Netherlands, for gifts of chemicals. solution, 1.5 g (15 mmol) of anhydrous calcium chloride and We thank the U.S.A. Committee on Problems of Drug 1.14 g (30 mmol) of sodium tetrahydroborate were added. The Dependence and Dr. A. E. Jacobson, Biological Coordi­ conversion was complete (TLC) after 6 days at 35°C. Water nator, for the results of the pharmacological studies. We (50 ml) was then added and the mixture acidified with 2 N hydro­ gen chloride to pH 2-3. Extraction with a mixture of chloroform are indebted to Dr.
    [Show full text]
  • Formaldehyde? Formaldehyde Is a Colorless, Strong-Smelling Gas Used to Make Household Products and Building Materials, Furniture, and Paper Products
    What is formaldehyde? Formaldehyde is a colorless, strong-smelling gas used to make household products and building materials, furniture, and paper products. It is used in particleboard, plywood, and fiberboard. What products contain formaldehyde? Formaldehyde can be found in most homes and buildings. Formaldehyde is also released into the air from many products you may use in your home. Because formaldehyde breaks down in air, you may breathe it in from such products as • carpet cleaner • gas cookers and open fireplaces, • cosmetics, • glue, • fabric softeners, • household cleaners, and • fingernail polish and hardeners, • latex paint. Burning cigarettes and other tobacco products also release formaldehyde. Products give off different amounts of formaldehyde. For example, • fingernail polish gives off more formaldehyde than do plywood and new carpet, and • some paper products—such as grocery bags and paper towels—give off only small amounts of formaldehyde. Our bodies even produce some formaldehyde, although only in small amounts. Will I get sick if I breathe or touch formaldehyde? You might not get sick if you breathe or touch formaldehyde, but if you have breathed or touched formaldehyde you may have symptoms such as • sore, itchy, or burning eyes, nose, or throat; • skin rash; or • breathing symptoms such as chest tightness, coughing, and shortness of breath. People who are more likely to get sick from being around formaldehyde are children, the elderly, and people with asthma. Formaldehyde may affect children more than it does adults. If you think your child may have been around formaldehyde, and he or she has symptoms contact a doctor. You should also know that: babies are not likely to get formaldehyde from breast milk, and you may be more sensitive to formaldehyde if you have asthma.
    [Show full text]
  • SODIUM FORMATE, Hydrate
    CXSO045 - SODIUM FORMATE, hydrate SODIUM FORMATE, hydrate Safety Data Sheet CXSO045 Date of issue: 04/04/2017 Version: 1.0 SECTION 1: Identification 1.1. Product identifier Product name : SODIUM FORMATE, hydrate Product code : CXSO045 Product form : Substance Physical state : Solid Formula : CHNaO2 Synonyms : FORMIC ACID, ZINC SALT, DIHYDRATE DIFORMATOZINC DIHYDRATE ZINC DIFORMATE DIHYDRATE Chemical family : METAL COMPOUND 1.2. Recommended use of the chemical and restrictions on use Recommended use : Chemical intermediate For research and industrial use only 1.3. Details of the supplier of the safety data sheet GELEST, INC. 11 East Steel Road Morrisville, PA 19067 USA T 215-547-1015 - F 215-547-2484 - (M-F): 8:00 AM - 5:30 PM EST [email protected] - www.gelest.com 1.4. Emergency telephone number Emergency number : CHEMTREC: 1-800-424-9300 (USA); +1 703-527-3887 (International) SECTION 2: Hazard(s) identification 2.1. Classification of the substance or mixture GHS-US classification Not classified 2.2. Label elements GHS-US labeling No labeling applicable 2.3. Hazards not otherwise classified (HNOC) No additional information available 2.4. Unknown acute toxicity (GHS US) No data available SECTION 3: Composition/Information on ingredients 3.1. Substances Substance type : Mono-constituent Name : SODIUM FORMATE, hydrate CAS No : 141-53-7 Name Product identifier % GHS-US classification Sodium formate (CAS No) 141-53-7 95 - 100 Not classified Full text of hazard classes and H-statements : see section 16 3.2. Mixtures Not applicable 4.1. Description of first aid measures First-aid measures general : Remove contaminated clothing and shoes.
    [Show full text]
  • Method 323—Measurement of Formaldehyde Emissions from Natural Gas-Fired Stationary Sources—Acetyl Acetone Derivitization Method
    While we have taken steps to ensure the accuracy of this Internet version of the document, it is not the official version. Please refer to the official version in the FR publication, which appears on the Government Printing Office's FDSys website (http://www.gpo.gov/fdsys/browse/collectionCfr.action?). Method 323—Measurement of Formaldehyde Emissions From Natural Gas-Fired Stationary Sources—Acetyl Acetone Derivitization Method 1.0 Introduction. This method describes the sampling and analysis procedures of the acetyl acetone colorimetric method for measuring formaldehyde emissions in the exhaust of natural gas-fired, stationary combustion sources. This method, which was prepared by the Gas Research Institute (GRI), is based on the Chilled Impinger Train Method for Methanol, Acetone, Acetaldehyde, Methyl Ethyl Ketone, and Formaldehyde (Technical Bulletin No. 684) developed and published by the National Council of the Paper Industry for Air and Stream Improvement, Inc. (NCASI). However, this method has been prepared specifically for formaldehyde and does not include specifications (e.g., equipment and supplies) and procedures (e.g., sampling and analytical) for methanol, acetone, acetaldehyde, and methyl ethyl ketone. To obtain reliable results, persons using this method should have a thorough knowledge of at least Methods 1 and 2 of 40 CFR part 60, appendix A–1; Method 3 of 40 CFR part 60, appendix A–2; and Method 4 of 40 CFR part 60, appendix A–3. 1.1 Scope and Application 1.1.1 Analytes. The only analyte measured by this method is formaldehyde (CAS Number 50–00–0). 1.1.2 Applicability. This method is for analyzing formaldehyde emissions from uncontrolled and controlled natural gas-fired, stationary combustion sources.
    [Show full text]
  • Toxicological Profile for Formaldehyde
    TOXICOLOGICAL PROFILE FOR FORMALDEHYDE U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES Public Health Service Agency for Toxic Substances and Disease Registry July 1999 FORMALDEHYDE ii DISCLAIMER The use of company or product name(s) is for identification only and does not imply endorsement by the Agency for Toxic Substances and Disease Registry. FORMALDEHYDE iii UPDATE STATEMENT Toxicological profiles are revised and republished as necessary, but no less than once every three years. For information regarding the update status of previously released profiles, contact ATSDR at: Agency for Toxic Substances and Disease Registry Division of Toxicology/Toxicology Information Branch 1600 Clifton Road NE, E-29 Atlanta, Georgia 30333 FORMALDEHYDE vii QUICK REFERENCE FOR HEALTH CARE PROVIDERS Toxicological Profiles are a unique compilation of toxicological information on a given hazardous substance. Each profile reflects a comprehensive and extensive evaluation, summary, and interpretation of available toxicologic and epidemiologic information on a substance. Health care providers treating patients potentially exposed to hazardous substances will find the following information helpful for fast answers to often-asked questions. Primary Chapters/Sections of Interest Chapter 1: Public Health Statement: The Public Health Statement can be a useful tool for educating patients about possible exposure to a hazardous substance. It explains a substance’s relevant toxicologic properties in a nontechnical, question-and-answer format, and it includes a review of the general health effects observed following exposure. Chapter 2: Health Effects: Specific health effects of a given hazardous compound are reported by route of exposure, by type of health effect (death, systemic, immunologic, reproductive), and by length of exposure (acute, intermediate, and chronic).
    [Show full text]
  • The Decomposition Kinetics of Peracetic Acid and Hydrogen Peroxide in Municipal Wastewaters
    Disinfection Forum No 10, October 2015 The Decomposition Kinetics of Peracetic Acid and Hydrogen Peroxide in Municipal Wastewaters INTRODUCTION Efficient control of microbial populations in municipal wastewater using peracetic acid (PAA) requires an understanding of the PAA decomposition kinetics. This knowledge is critical to ensure the proper dosing of PAA needed to achieve an adequate concentration within the contact time of the disinfection chamber. In addition, the impact of PAA on the environment, post-discharge into the receiving water body, also is dependent upon the longevity of the PAA in the environment, before decomposing to acetic acid, oxygen and water. As a result, the decomposition kinetics of PAA may have a significant impact on aquatic and environmental toxicity. PAA is not manufactured as a pure compound. The solution exists as an equilibrium mixture of PAA, hydrogen peroxide, acetic acid, and water: ↔ + + Acetic Acid Hydrogen Peroxide Peracetic Acid Water PeroxyChem’s VigorOx® WWT II Wastewater Disinfection Technology contains 15% peracetic acid by weight and 23% hydrogen peroxide as delivered. Although hydrogen peroxide is present in the formulation, peracetic acid is considered to be the active component for disinfection1 in wastewater. There have been several published studies investigating the decomposition kinetics of PAA in different water matrices, including municipal wastewater2-7. Yuan7 states that PAA may be consumed in the following three competitive reactions: 1. Spontaneous decomposition 2 CH3CO3H à 2 CH3CO2H + O2 Eq (1) 2. Hydrolysis CH3CO3H + H2O à CH3CO2H + H2O2 Eq (2) 3. Transition metal catalyzed decomposition + CH3CO3H + M à CH3CO2H + O2 + other products Eq (3) At neutral pH’s, both peracetic acid and hydrogen peroxide can be rapidly consumed by these reactions7 (hydrogen peroxide will decompose to water and oxygen via 2H2O2 à 2H2O + O2).
    [Show full text]
  • University of Groningen Discovery of a Eugenol Oxidase From
    University of Groningen Discovery of a eugenol oxidase from Rhodococcus sp strain RHA1 Jin, J.F.; Mazon, H.; van den Heuvel, R.H.H.; Janssen, D.B.; Fraaije, M.W. Published in: Febs Journal DOI: 10.1111/j.1742-4658.2007.05767.x IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Document Version Publisher's PDF, also known as Version of record Publication date: 2007 Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Jin, J. F., Mazon, H., van den Heuvel, R. H. H., Janssen, D. B., & Fraaije, M. W. (2007). Discovery of a eugenol oxidase from Rhodococcus sp strain RHA1. Febs Journal, 274(9), 2311 - 2321. https://doi.org/10.1111/j.1742-4658.2007.05767.x Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons). Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Download date: 23-09-2021 Discovery of a eugenol oxidase from Rhodococcus sp.
    [Show full text]
  • 1.0 Introduction. This Method Describes the Sampling and Analysis Procedures of the Acetyl Acetone Colorimetric Method For
    Method 323 8/7/2017 While we have taken steps to ensure the accuracy of this Internet version of the document, it is not the official version. To see a complete version including any recent edits, visit: https://www.ecfr.gov/cgi-bin/ECFR?page=browse and search under Title 40, Protection of Environment. METHOD 323—MEASUREMENT OF FORMALDEHYDE EMISSIONS FROM NATURAL GAS-FIRED STATIONARY SOURCES—ACETYL ACETONE DERIVITIZATION METHOD 1.0 Introduction. This method describes the sampling and analysis procedures of the acetyl acetone colorimetric method for measuring formaldehyde emissions in the exhaust of natural gas-fired, stationary combustion sources. This method, which was prepared by the Gas Research Institute (GRI), is based on the Chilled Impinger Train Method for Methanol, Acetone, Acetaldehyde, Methyl Ethyl Ketone, and Formaldehyde (Technical Bulletin No. 684) developed and published by the National Council of the Paper Industry for Air and Stream Improvement, Inc. (NCASI). However, this method has been prepared specifically for formaldehyde and does not include specifications (e.g., equipment and supplies) and procedures (e.g., sampling and analytical) for methanol, acetone, acetaldehyde, and methyl ethyl ketone. To obtain reliable results, persons using this method should have a thorough knowledge of at least Methods 1 and 2 of 40 CFR part 60, appendix A-1; Method 3 of 40 CFR part 60, appendix A-2; and Method 4 of 40 CFR part 60, appendix A-3. 1.1 Scope and Application 1.1.1 Analytes. The only analyte measured by this method is formaldehyde (CAS Number 50- 00-0). 1.1.2 Applicability.
    [Show full text]
  • Acta Sci. Pol., Technol. Aliment. 12(4) 2013, 385-393 IMPEDIMETRIC
    M PO RU LO IA N T O N R E U Acta Sci. Pol., Technol. Aliment. 12(4) 2013, 385-393 I M C S ACTA pISSN 1644-0730 eISSN 1889-9594 www.food.actapol.net/ IMPEDIMETRIC TEST FOR RAPID DETERMINATION OF PERFORMIC ACID (PFA) BIOCIDAL ACTIVITY TOWARD ECHERICHIA COLI Małgorzata Lasik1, Renata Dobrucka2, Piotr Konieczny1 1Faculty of Food Sciences and Nutrition, Poznań University of Life Sciences Wojska Polskiego 28, 60-637 Poznań, Poland 2Department of Industrial Products Quality and Ecology, Poznań University of Economics Niepodległości 10, 61-875 Poznań, Poland ABSTRACT Background. Performic acid has recently become available on a commercial scale for potential use in waste- water disinfection and can become an innovative biocide for various purposes in food processing. The aim of our study was: 1) to investigate the antimicrobial resistance of performic acid as high active and non toxic chemical disinfectant against Escherichi coli (hygiene indicator test microorganism used in industrial micro- biology) and 2) to evaluate the electrical impedance measurement method usefulness for fast and high precise test of antibacterial activity. Material and methods. Four types of antimicrobial disinfectants (commercial 35% hydrogen peroxide, 1% performic acid, 35% hydrogen peroxide and 15% formic acid) were tested against Escherichia coli as hy- giene indicator test microorganism. By evaluating the biocidal activity of selected disinfectants two methods were compared: electrical impedance measurement and classical serial dilution method with turbidity effect. Results. It was stated that the performic acid expressed the highest antibacterial activity in comparison to other tested peroxide disinfectants: commercial 35% hydrogen peroxide solution and components required for performic acid production: 35% hydrogen peroxide solution with stabilizers and 15% formic acid solution with stabilizers).
    [Show full text]
  • Algorithmic Analysis of Chemical Dynamics of the Autoignition of NH3–H2O2/Air Mixtures
    energies Article Algorithmic Analysis of Chemical Dynamics of the Autoignition of NH3–H2O2/Air Mixtures Ahmed T. Khalil 1,2, Dimitris M. Manias 3, Efstathios-Al. Tingas 4, Dimitrios C. Kyritsis 1,2,* and Dimitris A. Goussis 1,2 1 Department of Mechanical Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, UAE; [email protected] (A.T.K.); [email protected] (D.A.G.) 2 Research and Innovation Center on CO2 and H2 (RICH), Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, UAE 3 Department of Mechanics, School of Applied Mathematics and Physical Sciences, National Technical University of Athens, 157 73 Athens, Greece; [email protected] 4 Perth College, University of the Highlands and Islands, (UHI), Perth PH1 2NX, UK; [email protected] * Correspondence: [email protected] Received: 8 September 2019; Accepted: 7 October 2019; Published: 21 November 2019 Abstract: The dynamics of a homogeneous adiabatic autoignition of an ammonia/air mixture at constant volume was studied, using the algorithmic tools of Computational Singular Perturbation. Since ammonia combustion is characterized by both unrealistically long ignition delays and elevated NOx emissions, the time frame of action of the modes that are responsible for ignition was analyzed by calculating the developing time scales throughout the process and by studying their possible relation to NOx emissions. The reactions that support or oppose the explosive time scale were identified, along with the variables that are related the most to the dynamics that drive the system to an explosion.
    [Show full text]
  • Interaction of Ozone and Hydrogen Peroxide in Water Implications For
    UC Irvine Faculty Publications Title Interaction of ozone and hydrogen peroxide in water: Implications for analysis of H 2 O 2 in air Permalink https://escholarship.org/uc/item/7j7454z7 Journal Geophysical Research Letters, 9(3) ISSN 00948276 Authors Zika, R. G Saltzman, E. S Publication Date 1982-03-01 DOI 10.1029/GL009i003p00231 License https://creativecommons.org/licenses/by/4.0/ 4.0 Peer reviewed eScholarship.org Powered by the California Digital Library University of California GEOPHYSICLARESEARCH LETTERS, VOL. 9, NO. 3, PAGES231-234 , MARCH1982 INTERACTION OF OZONE AND HYDROGEN PEROXIDE IN WATER: IMPLICATIONSFORANALYSIS oFH20 2 IN AIR R.G. Zika and E.S. Saltzman Division of Marine and Atmospheric Chemistry, University of Miami, Miami, Florida 331#9 Abstract. We have attempted to measure gaseous Analytical Methods H202 in air usingan aqueoustrapping method. With continuousbubbling, H 20 2 levels in the traps reacheda a. Hydrogen Peroxide. Hydrogen peroxide in aqueous plateau, indicating that a state of dynamic equilibrium solution was measured using a modified fluorescence involving H202 destrbction was established. We decay technique [Perschke and Broda, 1976; Zika and attribute this behavior to the interaction of ozone and its Zelmer, 1982]. The method involved the addition of a decompositionproducts (OH, O[) withH 20 2 inacld:•ous known amot•at of scopoletin (6-methyl-7-hydroxyl-i,2- solution. This hypothesis was investigated by replacing benzopyrone)to a pH 7.0 phosphatebuffered. sample. the air stream with a mixture of N2, 02 and 0 3. The The sample was prepared bY diluting an aliquot of the results Of this experiment show that H O was both reaction solution to 20 mls with low contaminant producedand destroyedin the traps.
    [Show full text]
  • WHO Guidelines for Indoor Air Quality : Selected Pollutants
    WHO GUIDELINES FOR INDOOR AIR QUALITY WHO GUIDELINES FOR INDOOR AIR QUALITY: WHO GUIDELINES FOR INDOOR AIR QUALITY: This book presents WHO guidelines for the protection of pub- lic health from risks due to a number of chemicals commonly present in indoor air. The substances considered in this review, i.e. benzene, carbon monoxide, formaldehyde, naphthalene, nitrogen dioxide, polycyclic aromatic hydrocarbons (especially benzo[a]pyrene), radon, trichloroethylene and tetrachloroethyl- ene, have indoor sources, are known in respect of their hazard- ousness to health and are often found indoors in concentrations of health concern. The guidelines are targeted at public health professionals involved in preventing health risks of environmen- SELECTED CHEMICALS SELECTED tal exposures, as well as specialists and authorities involved in the design and use of buildings, indoor materials and products. POLLUTANTS They provide a scientific basis for legally enforceable standards. World Health Organization Regional Offi ce for Europe Scherfi gsvej 8, DK-2100 Copenhagen Ø, Denmark Tel.: +45 39 17 17 17. Fax: +45 39 17 18 18 E-mail: [email protected] Web site: www.euro.who.int WHO guidelines for indoor air quality: selected pollutants The WHO European Centre for Environment and Health, Bonn Office, WHO Regional Office for Europe coordinated the development of these WHO guidelines. Keywords AIR POLLUTION, INDOOR - prevention and control AIR POLLUTANTS - adverse effects ORGANIC CHEMICALS ENVIRONMENTAL EXPOSURE - adverse effects GUIDELINES ISBN 978 92 890 0213 4 Address requests for publications of the WHO Regional Office for Europe to: Publications WHO Regional Office for Europe Scherfigsvej 8 DK-2100 Copenhagen Ø, Denmark Alternatively, complete an online request form for documentation, health information, or for per- mission to quote or translate, on the Regional Office web site (http://www.euro.who.int/pubrequest).
    [Show full text]