To address the air pollution diffusing problem,a visualization algorithm based on fluid diffusion physical model and volume rendering is proposed to simulate the diffusion process epically for the urgent pollution accidents.The diffusion model is based on the simplified heat diffusion equation and the basic vortex constraint.The texture mapping based volume rendering method is adapted to handle the visualization algorithm.In addition,the render process adopts the GPU to implement the real-time visualization rendering.

关键词：大气；空气污染；可视化

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The overarching purpose of this report is to present analysis of the 2008 NEI and comparison to previous years of inventory data, with a primary focus on the last full NEI - the 2005 NEI. We describe the national and regional patterns of CAP/HAP emission distributions in the 2008 NEI and which sources contribute to these releases. We do not assess nor predict the absolute risks to human health and ecosystems that may be associated with the presence of any of these specific air pollutants, but rather focus on the intensity of emission releases that may pose elevated risks. Pollutants of greatest interest include not only those that contribute to ozone and particle pollution, but also HAPs that are predicted by the 2005 NATA to be the most harmful to human health. To facilitate a more concise document, we have included just 27 pollutants in the report, which are listed in Table 1. Eight of these 27 pollutants are either CAPs or precursors to CAPs, and the remaining 19 are HAPs that were selected based on criteria that will be discussed later in this report.

关键词：大气；碳排放；空气污染

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Results from 548,507 indoor radon tests from a database compiled by the Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection, Radon Division, are evaluated in this report in an effort to determine areas where concentrations of radon are highest. Indoor radon concentrations were aggregated according to geologic unit and hydrogeologic setting for spatial analysis. Indoor radon concentrations greater than or equal to the U.S. Environmental Protection Agency (USEPA) action level of 4 picocuries per liter (pCi/L) were observed for 39 percent of the test results; the highest concentration was 1,866.4 pCi/L.

关键词：大气；有毒气体；室内氡

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Cumene (CASRN 98-82-8, isopropylbenzene) is an alkylated benzene found in fossil fuels, such as blended gasoline and kerosene, and products of incomplete combustion (IARC2012). It has a gasoline-like odor and can exist as a vapor in ambient air. 

关键词：大气；空气污染；致癌物质

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The Annual Energy Outlook 2013 (AEO2013) included several alternative cases in which hypothetical carbon dioxide (CO2) emission fees were imposed on fossil fuel consumers on an economy-wide basis.

关键词：大气；空气污染；二氧化碳

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The U.S. Department of Energy, National Nuclear Security Administration Nevada Field Office (NNSA/NFO) operates the Nevada National Security Site (NNSS) and North Las Vegas Facility (NLVF). From 1951 through 1992, the NNSS was the continental testing location for U.S. nuclear weapons. The release of radionuclides from NNSS activities has been monitored since the initiation of atmospheric testing. Limitation to underground detonations after 1962 greatly reduced radiation exposure to the public surrounding the NNSS. After nuclear testing ended in 1992, NNSS radiation monitoring focused on detecting airborne radionuclides from historically contaminated soils. These radionuclides are derived from re-suspension of soil (primarily by wind) and emission of tritium-contaminated soil moisture through evapotranspiration. Low amounts of legacy-related tritium are also emitted to air at the NLVF, an NNSS support complex in North Las Vegas. To protect the public from harmful levels of man-made radiation, the Clean Air Act, National Emission Standards for Hazardous Air Pollutants (NESHAP) (Title 40 Code of Federal Regulations (CFR) Part 61 Subpart H) (CFR 2010a) limits the release of radioactivity from a U.S. Department of Energy (DOE) facility to that which would cause 10 millirem per year (mrem/yr) effective dose equivalent to any member of the public. This limit does not include radiation unrelated to NNSS activities. Unrelated doses could come from naturally occurring radioactive elements, from sources such as medically or commercially used radionuclides, or from sources outside of the United States, such as the damaged Fukushima nuclear power plant in Japan in 2011.

关键词：大气；空气污染物；排放标准

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Lawmakers could increase federal revenues and encourage reductions in emissions of carbon dioxide (CO2) by establishing a carbon tax, which would either tax those emissions directly or tax fuels that release CO2 when they are burned (fossil fuels, such as coal, oil, and natural gas). Emissions of CO2 and other greenhouse gases accumulate in the atmosphere and contribute to climate changea long-term and potentially very costly global problem. The effects of a carbon tax on the U.S. economy would depend on how the revenues from the tax were used. Options include using the revenues to reduce budget deficits, to decrease existing marginal tax rates (the rates on an additional dollar of income), or to offset the costs that a carbon tax would impose on certain groups of people. This study examines how a carbon tax, combined with those alternative uses of the revenues, might affect the economy and the environment.

关键词：大气；碳税；经济

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees,makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product,process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement,recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

关键词：大气；有害污染物；节能

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Energy-related carbon dioxide (CO2) emissions in 2012 were the lowest in the United States since 1994, at 5.3 billion metric tons of CO2 (see figure above). With the exception of 2010, emissions have declined every year since 2007.

关键词：大气；全球变暖；空气污染

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There are large amount of ammonia in coking wastewater.It is a good recycling desulfurizer.Sintering flue gas has the characteristics,such as large amount of,low SO2 concentration,great changes of operation load.Treating sintering flue gas with coking wastewater can attain the destination of treating waste with waste.This paper adopts a spray tower countercurrent device,and SO2 concentration in the entrance and exit flue gas is on line detected by an automatic flue gas detection instrument.The paper studies on the change rule of SO2 concentration in the process of treating sintering flue gas using coking wastewater,and the influence of SO2 initial concentration in sintering flue gas to the desuifurization rate.The results show that after being treated the sintering flue gas can reach the emission standard for air pollutants of iron and steel industry.

关键词：大气；焦化废水；空气治理

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