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151.
D. R. van der Vaart W. M. Vatavuk A. H. Wehe 《Journal of the Air & Waste Management Association (1995)》2013,63(4):497-501
In an earlier paper, major commercially available incinerator technologies designed to treat dilute waste gas streams containing volatile organic compounds (VOCs) were described in a qualitative comparison. In addition, a simplified procedure was outlined through which important sizing parameters could be calculated given certain information about the waste gas. This paper describes the use of these parameters in developing a study (±30percent) cost estimate for the total capital investment and the total annual costs incurred in treating a waste stream of volatile organic compounds (VOCs). An illustrative problem used in the former paper is completed here in order to contrast some of the economic differences between thermal and catalytic incinerator systems. 相似文献
152.
Richard W. Baldauf Russell W. Wiener David K. Heist 《Journal of the Air & Waste Management Association (1995)》2013,63(12):1433-1442
Abstract In siting a monitor to measure compliance with U.S. National Ambient Air Quality Standards (NAAQS) for par-ticulate matter (PM), there is a need to characterize variations in PM concentration within a neighborhood-scale region to achieve monitor siting objectives. A simple methodology is provided here for the selection of a neighborhood-scale site for meeting either of the two objectives identified for PM monitoring. This methodology is based on analyzing middle-scale (from 100 to 500 m) data from within the area of interest. The required data can be obtained from widely available dispersion models and emissions databases. The performance of the siting methodology was evaluated in a neighborhood-scale field study conducted in Hudson County, NJ, to characterize the area’s inhalable particulate (PM10) concentrations. Air monitors were located within a 2- by 2-km area in the vicinity of the Lincoln Tunnel entrance in Hudson County. Results indicate the siting methodology performed well, providing a positive relationship between the predicted concentration rank at each site and the actual rank experienced during the field study. Also discussed are factors that adversely affected the predictive capabilities of the model. 相似文献
153.
154.
The purpose of Manual APM-3 is to provide a guide which will help increase the uniformity between various surveys, and thereby increase the useability of the data by others. 相似文献
155.
156.
A. C. Costonis W. A. Sinclair 《Journal of the Air & Waste Management Association (1995)》2013,63(11):867-872
In a study of the ozone-induced needle blight of eastern white pine in central New York, acute injuries naturally induced on field trees during a year of relatively low ozone concentrations (1 966) were compared with injuries induced during a year of higher concentrations (1967). Injuries were more frequent and severe and were associated with higher mean ozone concentrations in 1967 than in 1966. Characteristic symptoms were induced on foliage of pine branches exposed to controlled doses of ozone as low as 7 ± 1 pphm for four hours or 3 ± 1 pphm for 48 hours. Such doses were equalled or exceeded two and four times, respectively, in the field during the 1 967 season. Ozone sensitivity of pine needle tissue was increased by fumigation in atmospheres containing water mist. High concentrations of ozone (40-60 pphm) caused general injury of foliage of both ozone-susceptible and resistant trees; the symptoms were unlike those found in the field or caused by fumigation with low concentrations of ozone. 相似文献
157.
M. Boulerice W. Brabant 《Journal of the Air & Waste Management Association (1995)》2013,63(6):432-434
Since 1966, the Division of Laboratories of the Department of Health of the City of Montreal is carrying on measurements of gaseous pollutants. In order to efficiently use the technical staff that our administrators wanted to devote to the fight against air pollution, a new lead dioxide support for the determination of sulfur dioxide has been devised. The preparation of candies according to the standard method requires much time and skill from the operator, whereas the technique that is proposed is rapid, easy, and provides plates of a high degree of uniformity. A technician with little experience can coat a great number of plates per day with no difficulty. N. A. Huey working at the National Center for Air Pollution Control in Cincinnati published in the September 1968 issue of this Journal a new technique which consists of coating the inside of a plastic Petri dish with a PbO2 paste. His method also has the above mentioned advantages. The plates that are suggested allow a simplification of the preliminary work for several types of analyses such as gra-vimetry,1 colorimetry,3 turbidimetry,4,5 titrimetry,6 and nephelemetry.8 相似文献
158.
William M. Porch Hugh W. Ellsaesser 《Journal of the Air & Waste Management Association (1995)》2013,63(2):134-137
Noontime visibilities in downtown Los Angeles, averaged over the smog season of June through November, show two cycles of general deterioration and improvement. The improvement since 1962 is confirmed by available high volume filter data and conditions in 1974/75 are at least as good as at anytime since observations were begun in 1933. The decrease in frequency of “rule 57” days suggests that the improvement of the last decade and perhaps the cyclic variation of the past 40 years has been primarily of meteorological origin. 相似文献
159.
160.
While the United States is the largest single market for air pollution control equipment, it constitutes only about one-third of the total world market. This overview explores the legislative, economic, and technological factors that affect those markets. 相似文献