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Sunday, July 19, 2020 | History

2 edition of Sulfur deposition modeling in support of the U.S./Canadian memorandum of intent on acid rain found in the catalog.

Sulfur deposition modeling in support of the U.S./Canadian memorandum of intent on acid rain

Terry L. Clark

Sulfur deposition modeling in support of the U.S./Canadian memorandum of intent on acid rain

by Terry L. Clark

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  • 31 Currently reading

Published by U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory, U.S. Environmental Protection Agency, Center for Environmental Research Information, [distributor] in Research Triangle Park, NC, Cincinnati, OH .
Written in English

    Subjects:
  • Acid rain -- United States,
  • Air -- Pollution -- United States,
  • Sulfur deposits -- United States

  • Edition Notes

    StatementT.L. Clark and D.H. Coventry
    ContributionsCoventry, D. H, Environmental Sciences Research Laboratory
    The Physical Object
    Pagination4 p. ;
    ID Numbers
    Open LibraryOL14892073M

    International concern about acid deposition was raised significantly by Sweden's case study for the United Nations' Conference on the Human Environment in which was entitled "Air Pollution Across National Boundaries: The Impact on the Environment of Sulfur in Air and Precipi- . Through its major derivative, sulfuric acid, sulfur ranks as one of the more-important elements used as an industrial raw material. It is of prime importance to every sector of the world's industrial and fertilizer complexes. Sulfuric acid production is the major end use for sulfur, and consumption of sulfuric acid has been regarded as one of the best indexes of a nation's.

    regional haze, and acid rain in the transboundary region. U.S. EPA and Environment Canada reviewed the key components of the U.S. cap and trade programs and developed Canada-U.S. economic and air quality modeling tools to be able to assess the potential economic and environmental impacts of NOX and SO2 cross-border trading. Introduction The primary long-term goal of The Canada-Wide Acid Rain Strategy for Post (The Strategy) is “to meet the environmental threshold of critical loads for acid deposition across Canada”. A critical load is an effects-based measurement defined as “a quantitative estimate of.

    Air pollution in the form of acidic deposition is comprised of sulfuric and nitric acids and ammonium derived from emissions of sulfur dioxide, nitrogen oxides, and ammonia. These compounds are largely emitted to the atmosphere by fossil fuel burning and agricultural activities. experimental watersheds was used to evaluate the potential impact of sulfur and associated acid deposition on cation-leaching and content of water. Observed stream discharge of nitrate nitrogen was used to calculate H* production due to accelerated nitrification in response to forest harvest. This value or a calculated value for H*.


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Sulfur deposition modeling in support of the U.S./Canadian memorandum of intent on acid rain by Terry L. Clark Download PDF EPUB FB2

United States, Environmental Protection Agency Environmental Sciences Research Laboratory Research Triangle Park NC Research and Development EPA/S Jan. &ERA Project Summary Sulfur Deposition Modeling in Support of the U.S./Canadian Memorandum of Intent on Acid Rain T.

L Clark and D. Coventry At the request of the U.S./Canadian Work Group 2 of the Acid Rain Memo. Get this from a library. Sulfur deposition modeling in support of the U.S./Canadian memorandum of intent on acid rain. [Terry L Clark; D H Coventry; Environmental Sciences Research Laboratory.].

At the request of the U.S./Canadian Work Group 2 of the Acid Rain Memorandum of Intent, the Eastern North American Model of Air Pollution (EMAMAP-1) was applied to simulate the monthly wet and dry depositions and "monthly averaged ambient concentrations of S02 and $04 for January.

The observations suggest a larger reduction of total OxS deposition than the model estimates (i.e., 40% vs. 34%) which could be attributable to active control programs post, including the Acid Rain Program and Tier 2 Gasoline Sulfur requirement for mobile sources fully implemented in Cited by: 2.

Key word index: Sulfur wet deposition, ANATEX, trajectories, long-range transport, acid rain. INTRODUCTION During the last 10 years, a variety of models have been developed to study the transport and deposition of pollutants and their contribution to acid by: from phase I of the Acid Rain Pro-gram (see “Trends in SO 2” in Chapter 2 of this report).

The largest reduc­ tions in wet sulfate deposition oc­ curred along the Ohio River Valley CHAPTER 7 • ATMOSPHERIC DEPOSITION OF SULFUR AND NITROGEN COMPOUNDS Sulfur deposition has been a prominent internal corrosion accelerant issue in sour gas pipeline production operations.

In this paper, a theoretical model is proposed to predict the behaviour of. A three dimensional regional Eulerian model of sulfur deposition and tranport has been developed. It includes emission, transport, diffusion, gas-phase and aqeous-phase chemical process, dry depostion, rainout and washout process.

A “looking up table” method is provided to deal with the gas-phase chemical process including sulfur transfer. It has been documented that there is a kinetic aspect to the elemental sulfur deposition In pipelines where there is a long slow decline in pressure and an almost steady temperature, deposition can be delayed to well below saturation levels (i.e., supersaturated).

Such deposition can be delayed for up to km ( miles). deposition. Total sulfur deposition includes the wet and dry deposition of sulfur dioxide (SO 2) and particulate sulfate (SO 4). The main source of sulfur emissions is the burning of fossil fuels, although some come from natural sources such as volcanoes.

Atmospheric deposition of sulfur and nitrogen plays an important role in terrestrial. Equations of the model We choose to model the gas expansion by a Flash. We consider the gas expansion of an inflow gas phase in order to obtain outflow phases (more specifically, a gas phase and possibly a solid phase).

Chemical reactions can be taken into account. The model is based on the classical equations below: xMass balances. A model is developed which, with three assumptions, provides a method to calculate dissimilatory CBS using S pool size and stable isotope measurements.

Application of the model to a wetland in the New Jersey Pinelands, U.S.A., shows that large amounts of reduced dissimilatory S are stored in the soil. Financial support provided by Alberta Environment and Alberta Agriculture. -- AECVP2;p. An overview of Alberta Environment's acid deposition program / Primus, Carl L -- p.

Potential research money available from the acid deposition program and Alberta Environment /. [1] We used a general circulation model of Earth's climate to conduct geoengineering experiments involving stratospheric injection of sulfur dioxide and analyzed the resulting deposition of sulfate.

When sulfur dioxide is injected into the tropical or Arctic stratosphere, the main additional surface deposition of sulfate occurs in midlatitude bands, because of strong cross‐tropopause flux in.

Acid deposition, more commonly known as acid rain, occurs when emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) react in the atmosphere (with water, oxygen, and oxidants) to form.

Kentaro Hayashi, Michio Komada, Akira Miyata, Atmospheric Deposition of Reactive Nitrogen on Turf Grassland in Central Japan: Comparison of the Contribution of Wet and Dry Deposition, Acid Rain - Deposition to Recovery, /, (), ().

Emissions of sulfur dioxide (SO2) to the atmosphere lead to atmospheric deposition of sulfate (SO42–), which is the dominant strong acid anion causing acidification of surface waters and soils in the eastern United States. Since passage of the Clean Air Act and its Amendments, atmospheric deposition of SO2 in this region has declined by over 80%, but few corresponding decreases in.

The Eulerian acid deposition model has been developed at MSC-Was a multi-layermodel for simulating atmospheric transport and deposition of nitrogen and sulphur compounds in Europe.

The first version of the EMEP Eulerian model was developed by Berge (a) and then modified and further improved by Jakobsen et al. At this stage, the. a principal cause of acid rain. 2 provinces, where elevated acid deposition 1 The SO 2 commitments are listed in the United States–Canada Air Quality Agreement Annex 1: Specific Objectives Concerning Sulfur Dioxide and Nitrogen Oxides, Section 1.

Sulfur Dioxide, Part. The Clean Air Act added regulatory programs for control of acid deposition (acid rain) and stationary source operating permits.

The provisions aimed at reducing sulfur dioxide emissions included a cap-and-trade program, which gave power companies more flexibility in meeting the law's goals compared to earlier iterations of the Clean Air.

Acid Deposition Every year, millions of tons of sulfur dioxide and nitrogen oxides are emitted to the atmosphere as a widely recognized form (more commonly referred to as “acid rain”), dry deposition can account for U.S., where data are most abundant, average total sulfur deposition decreased by 85 percent between and Gas-Phase Reactions.

Oxidation of SO to form sulfate, oxidation of DMS to form SO, and production and destruction of H O are represented in the model. In R1, it is assumed that the SO + OH reaction is the rate-limiting step of the multistep process of forming aerosol sulfate.

Concentrations of short-lived radicals OH, NO, and HO are prescribed using three-dimensional, monthly.the remaining sulfur gases to sulfur vapor, but the combined effect of the entire unit is to reduce the hydrogen sulfide content to an acceptable level.

High Yields Plus Energy Claus sulfur plants can normally achieve high sulfur recovery efficiencies. For lean acid gas streams, the recovery typically ranges from 93% for two-2 S and SO 2.