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Wednesday, July 8, 2020 | History

1 edition of Volatilization rates from water to indoor air found in the catalog.

Volatilization rates from water to indoor air

Volatilization rates from water to indoor air

phase II

  • 76 Want to read
  • 34 Currently reading

Published by United States Environental Protection Agency in Washington, D.C .
Written in English

    Subjects:
  • Indoor air pollution.,
  • Water -- Pollution.

  • Edition Notes

    StatementU.S. Environmental Protection Agency, Office of Research and Development, National Center for Environmental Assessment--Washington Office.
    ContributionsNational Center for Environmental Assessment (Washington, D.C.)
    Classifications
    LC ClassificationsTD883.17 .V65 2000
    The Physical Object
    Pagination1 v. (various pagings) :
    ID Numbers
    Open LibraryOL3997843M
    LC Control Number2001344099
    OCLC/WorldCa47801118

      Moisture Content. The presence of a certain amount of water in a landfill increases gas production because moisture encourages bacterial growth and transports nutrients and bacteria to all areas within a landfill. A moisture content of 40% or higher, based on wet weight of waste, promotes maximum gas production (e.g., in a capped landfill. Poultry facilities contribute ammonia emissions to the atmosphere. Reduction in ammonia volatilization from poultry facilities is possible utilizing correct management techniques. This project will evaluate the effect of litter amendments on ammonia volatilization and determine the effectiveness of these chemical applications to inhibit ammonia volatilization on poultry farms.

    soil gas in October , and indoor air in Feb-ruary (PGG, & ). For the Febru-ary indoor air sample, the CCEF is , and the NCCEF is , which exceeds the bench-mark of See Figure 1 for past indoor, ambient air, and sub-slab soil gas sample locations. Overall 9 indoor air samples have been collected at the. The contribution of these products to the benzene content of indoor air, indirectly determined from the differences in reported concentrations in indoor air in the homes of nonsmokers and the corresponding concentrations in ambient air in a survey of homes in the United States (Wallace et al., ; Wallace, ), has been estimated to be 2.

    Agriculture, including meat-type poultry production, continues to be the dominant industry in rural communities. However, the intensity of poultry production and competitive economic factors have sometimes resulted in poor indoor air quality and emissions of air pollutants into the outdoor environment. Consequently, environmentally sound sustainable systems of production that have low impacts.   The highest indoor air concentration of methamidophos was pg/m 3, seven orders of magnitude lower than the outdoor air samples (Elgethun, ; Weppner et Cited by: 5.


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Volatilization rates from water to indoor air Download PDF EPUB FB2

Additional Physical Format: Online version: Volatilization rates from water to indoor air. Washington, D.C.: U.S. Environmental Protection Agency, []. EPA /R/ October VOLATILIZATION RATES FROM WATER TO INDOOR AIR PHASE II National Center for Environmental Assessment-Washington Office Office of Research and Development U.S.

Environmental Protection Agency Washington, DC Printed on Recycled Paper. The goal of this work is the modeling and calculation of volatilization factors (VFs) from water to air for volatile organic compounds (VOCs) in order to perform human health risk-based reference. The goal of this work is the modeling and calculation of volatilization factors (VFs) from water to air for volatile organic compounds (VOCs) in order to perform human health risk-based reference levels (RLs) for the safe use of water.

The VF models have been developed starting from the overall mass-transfer coefficients (Koverall) concept from air to water for two interaction geometries (flat Cited by: 3. The calculated Volatilization rates from water to indoor air book of indoor-air exposure to tap water concentration is compared to measured values for one of the compounds, chloroform.

A sensitivity analysis is used to identify important. Selenium volatilization rates from plants and soil confined in a closed transparent chamber varied greatly among five plant species over 3- to 6-day collection periods.

Astragalus bisulcatus and broccoli showed the highest rates of volatilization, and {mu}g Se/kg dry soil/day, respectively. @article{osti_, title = {Human exposure to volatile organic compounds in household tap water: the indoor inhalation pathway}, author = {McKone, T E}, abstractNote = {This paper addresses the quantification of human exposure to volatile organic compounds (VOC's) as a result of mass transfer from tap water to indoor air.

A three-compartment model is developed and used to simulate the h. Indoor Air Pollution: Introduction for Health Professionals. IAQ Indoor Air Quality Concerns - US CPSC Book- Indoor air quality diagnostic checklist & quick reference guide - table.

Indoor air pollution from tobacco smoke. Indoor air pollution from combustion products. Indoor air pollution from animal dander, asbestos, and other particulates. is a chapter of Volume 2: Characteristics of indoor air Abstract Residents of a western Pennsylvania community have been using a public groundwater supply known to be contaminated with trichloroethylene (TCE) at concentrations as high as micro-g/L.

Volatilization studies were conducted in several homes in this community to assess. Volatilization rates from ground water may be further reduced by a build-up of chemical in the pore air at the ground water/pore air interface, and an associated decrease in the concentration gradient across the interface.

By substituting the estimated KQC value for chlordane of x (Section ) into equation A-9 along with the compound. The National Research Council closes the landmark series Drinking Water and Health with Volume 9, published in two parts.

Part I: DNA Adducts provides an overview of DNA adducts and their effects on human health, explores the techniques currently in use for detecting them, offers an outlook on future toxicity testing, and lists specific recommendations for action.

In Volatilization Rates From Water to Indoor Air: Phase II. Prepared for United States Environmental Protection Agency, Office of Research and Development, The National Center for Environmental Assessment, Washington, DC (Technical Merit Review Draft, released for citation by J.

Moya, USEPA Project Officer), Grant Number CR 01, pp. Cited by: Improved estimation of chemical volatilization rates from drinking water to indoor air.

Proceedings of the 91st Annual Meeting and Exhibition, paper no. TA9C, Cited by: The indoor concentrations of airborne contaminants depend on five factors: the qaneration rate (for indoor~qanerated pollutants) or the ambient concentration (for outdoor-generated pollutants), the Solve of the indoor en~rtronaent, the air-exchange rate, the mixing efficiency of the indoor space, and the decay (removal) rates of the pollutant.

E = ⋅ MW(Average windspeed)(Surface Area)(vapor pressure) ⋅ temperature in K. Surface Area Equations: l = Length of the liquid spilled. w = Width of liquid spilled.

A − (π ⋅ (Diameter of tank in berm 2)2 ⋅ (How many tanks in berm)) Scenario 2: If we have 3 tanks in the berm. l = Length of the liquid spilled. Volatile organic compounds (VOCs) are chemicals that both vaporize into air and dissolve in water.

VOCs are pervasive in daily life, because they’re used in industry, agriculture, transportation, and day-to-day activities around the home. Once released into groundwater, many VOCs are persistent and can migrate to drinking-water supply wells.

Water and other liquids evaporate at different rates. These rates are influenced by the temperature, humidity, air flow and surface area of the liquid that is exposed to the air. While a liquid's evaporation rate may vary with conditions, the evaporation rates of different liquids are stable relative to each other.

Indoor air concentrations of PAEs were used to evaluate the daily exposure dose (DED) via dermal absorption (DED dermal) based on the following equation (Wang et al., ): (4) DED dermal = C air × k × SA × f × t BW where C air (ng/m 3) is the concentration of PAEs in laboratory air; k (m/h) is the transdermal permeability coefficient of Author: Yu-Xi Feng, Nai-Xian Feng, Li-Juan Zeng, Xin Chen, Lei Xiang, Yan-Wen Li, Quan-Ying Cai, Ce-Hui Mo.

In Europe, indoor concentrations and personal exposures are usually low, typically below 1–2 μg/m 3 ().In a large-scale study representative of the Federal Republic of Germany before reunification (n = ), a mean naphthalene concentration of μg/m 3 in residential indoor air within a range of individual samples from to 14 μg/m 3 was reported ().

Propylene glycol (IUPAC name: propane-1,2-diol), according to the National Library of Medicine and Agency for Toxic Substances and Disease Registry, is a synthetic liquid substance that absorbs water.

It is labeled an organic compound in chemistry due to its carbon attributes. Its chemical formula is CH 3 CH(OH)CH 2 OH. It is a viscous, colorless liquid, which is nearly odorless but possesses E number: E (additional chemicals).

Mean concentrations of xylenes in ambient air are to and mg/m 3 for urban and rural locations, respectively (Dann and Wang, ); mean concentrations in indoor air in the homes of non-smokers in various seasons are 14 to mg/m 3 (Wallace and Pellizzari, ; Wallace et al., b). It is assumed that people generally spend 7.expanding knowledge on (1) the volatilization of chemicals from water to indoor air, (2) interactions between volatile organic compounds (VOCs) and indoor materials, (3) building decontamination chemistry, (4) ozone interactions with indoor materials, and.

Automobile Air Pollution Efforts to improve the standard of living for humans, through the control of nature and the development of new products have also resulted in the pollution of the environment.

Much of the world's air, water, and land is now partially poisoned by places have become uninhabitable. This pollution exposes people all around the globe to new risks from .