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Design and Performance of an Exposure System for Measuring the Response of Crops to Acid Rain and Gaseous Pollutants in the Field 田间作物对酸雨和气体污染物响应的暴露系统设计与性能研究
Pub Date : 1986-08-01 DOI: 10.1080/00022470.1986.10466127
J. Johnston, D. Shriner, C. Abner
During 1982-1984, experiments regarding the nature of crop responses to combinations of acid rain and gaseous pollutant treatments were conducted. Open-top field chambers were used in conjunction with an automatic rain exclusion-simulant distribution system to expose crops to controlled levels of gaseous pollutants and rain acidity in a field setting. Rain exclusion was achieved by automatically moving covers over the experimental plots at the onset of a rain event. The simulant distribution system was automatically activated after 0.25 mm of rain was collected in a recording rain gauge located adjacent to the experimental plots. Rain simulants were dispensed through nozzles until the amount deposited within the plot equaled that deposited by the natural rain outside the plot. The system was capable of dispensing rain simulants with three levels of acidity to ambient air plots and to charcoalfiltered and nonfiltered-air chambered plots. The ability to automatically dispense rain simulants during, and in e...
1982-1984年进行了作物对酸雨和气体污染物联合处理的响应性质试验。开放式的田间室与自动防雨模拟分配系统一起使用,使作物在田间环境中暴露于受控的气体污染物和雨水酸度中。通过在降雨事件开始时自动在试验田上移动覆盖物来实现防雨。在实验地块附近的记录雨量计收集0.25 mm雨量后,模拟分配系统自动启动。模拟降雨通过喷嘴分配,直到地块内沉积的量等于地块外自然降雨沉积的量。该系统能够将具有三种酸度的模拟雨分配到环境空气区、木炭过滤空气区和非过滤空气区。自动分配模拟降雨的能力,在…
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引用次数: 22
Automated data-logging personal exposure monitors for carbon monoxide. 自动数据记录个人一氧化碳暴露监测仪。
Pub Date : 1986-08-01 DOI: 10.1080/00022470.1986.10466125
W R Ott, C E Rodes, R J Drago, C Williams, F J Burmann
Description du systeme de mesure et de l'enregistreur de donnees a microprocesseur utilises dans deux dosimetres
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引用次数: 17
Odor thresholds by forced-choice dynamic triangle olfactometry: reproducibility and methods of calculation. 强迫选择动态三角形嗅觉法的气味阈值:再现性和计算方法。
Pub Date : 1986-08-01 DOI: 10.1080/00022470.1986.10466128
A Dravnieks, W Schmidtsdorff, M Meilgaard
The reproducibility of odor thresholds determined by forced-choice dynamic triangle olfactometry was studied employing panels of 23- 45 subjects who tested 12 odorants, with four replications for one (1-butanol). Depending on the selection of panelists, their number, and between-session differences in olfactometer variables, the standard deviation of log(threshold) values ranged from 0.12 (same session, different panels of nine) to 0.37 (different sessions, different panels of nine). Among the demographic factors, only age was found significant; those below age of 30 were 1.6-3 times more sensitive than the older group. No systematic sensitivity difference was found between females and males, and nonsmokers and smokers. Suspicion has been raised in the literature that the method used here, ASTM E679, yields biased results. It is shown for panels of 6-45 members that such biases are inconsequential if the range of concentration presented to the panelists is large enough, and the group threshold is well wit...
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引用次数: 31
An Assessment of Mercury Emissions from the Afton Copper Smelter, British Columbia, Canada 加拿大不列颠哥伦比亚省阿夫顿铜冶炼厂汞排放评估
Pub Date : 1986-07-01 DOI: 10.1080/00022470.1986.10466115
J. Robertson, C. J. Price
The afton Copper Smelter adjacent to Kamloops, British Columbia, Canada commenced operation in 1978 and employed a mercury scrubbing system. Two years of preproduction studies, which included monitoring for mercury in ambient air, water, soil, and vegetation were performed. The results from similar studies conducted during four full years (1978-81) and two partial years (1982-83) of production are presented in the data analysis. These programs illustrated that the most frequent ground impingement occurred within a 1.6-3.2-km radius of the source, and that the levels decreased with increasing distance from the source to a maximum radius of 8 km. The results of a comprehensive source monitoring program illustrated that the average mercury emission levels ranged from 3.2 to 6.8 kg/calendar day during 1979-81, and that the majority of the emissions were in a vapor form. The ambient monitoring data acquired when smelter operations were significantly reduced indicate a quick recovery to preproduction levels in virtually all monitored parameters and at most monitored sites. The integrated results from all mercury monitoring programs illustrate the environmental impact from mercury emissions which were two to four times the permit standard of 1.8 kg/day.
位于加拿大不列颠哥伦比亚省坎卢普斯附近的阿夫顿铜冶炼厂于1978年开始运营,采用了汞洗涤系统。进行了两年的生产前研究,其中包括监测环境空气、水、土壤和植被中的汞。在四个完整年份(1978-81年)和两个局部年份(1982-83年)进行的类似研究的结果在数据分析中给出。这些程序表明,最频繁的地面撞击发生在震源半径1.6-3.2 km范围内,并且随着距离震源距离的增加,震源水平降低,最大半径为8 km。综合污染源监测方案的结果表明,1979- 1981年期间,汞的平均排放水平在3.2 - 6.8千克/日历日之间,大部分排放以蒸汽形式存在。冶炼厂作业大大减少时获得的环境监测数据表明,几乎所有监测参数和大多数监测场址都迅速恢复到生产前的水平。所有汞监测项目的综合结果表明,汞排放对环境的影响是允许标准(每天1.8公斤)的2至4倍。
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引用次数: 2
Seasonal, Episodic and Targeted Control of Sulfate Deposition 硫酸盐沉积的季节性、阶段性和针对性控制
Pub Date : 1986-07-01 DOI: 10.1080/00022470.1986.10466114
D. Golomb, J. Fay, Subramanyam Kumar
The large differences in seasonal rates of wet sulfate deposition observed at many receptors in eastern North America imply that reducing SO2 emissions only in the summer half of the year (April-September) would bring about greater annual wet sulfate deposition reductions than reducing emissions by the same amount year-round. Targeting the emission reductions to those source areas which contribute the bulk of summer depositions in ecologically sensitive areas would increase further the gain factor, defined as the ratio of annual fractional deposition decrement to annual fractional emission decrement. In the northeastern U.S., between 10 and 15 rain episodes deposit about 60 percent of the annual wet sulfate; reducing emissions in the dry periods preceding these heavy deposition episodes could further increase the gain factor. However, it is difficult to predict these episodes, and they do not occur simultaneously over large regions of the country.
在北美东部的许多受体上观察到的湿硫酸盐沉积季节速率的巨大差异表明,仅在一年中的夏季(4 - 9月)减少SO2排放将比全年减少相同数量的排放带来更大的年度湿硫酸盐沉积减少量。将减少排放的目标锁定在生态敏感区夏季沉积量最大的源区,将进一步增加增益因子,即年沉积减量与年排放减量的比值。在美国东北部,每年10到15次降雨沉积了大约60%的湿硫酸盐;在这些重沉积事件之前的干旱期减少排放可以进一步增加增益因子。然而,很难预测这些事件,而且它们不会同时发生在该国的大片地区。
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引用次数: 14
Single-stage dewatering of FGD waste: emerging technology at plains-escalante station 烟气脱硫废水单级脱水:平原-埃斯卡兰特站的新兴技术
Pub Date : 1986-07-01 DOI: 10.1080/00022470.1986.10466123
J. Weis, D. Baumgardner, D. Hendry
The Escalante Unit No. 1 flue gas desulfurization (FGD) waste slurry dewatering system represents the first domestic utility to deviate from the typical industry two-stage dewatering system design. Evaluations conducted during the design phase compared three dewatering options: 1) thickener in series with vacuum filters, 2) thickener in series with centrifuges, and 3) centrifuges with no thickener. The evaluation showed that centrifuges with no thickener (one stage) could significantly reduce capital costs. Coupled with capital costs, this option also decreases operation and maintenance costs, reduces the complexity of the system, saves a considerable amount of space, and centralized the FGD and dewatering systems within one building. This paper describes the evaluation that took place during the design phase of the project comparing the three dewatering options. Operational data for the first year of operation are presented, and operating and maintenance costs are discussed and compared with conventional two-stage dewatering systems.
Escalante 1号机组烟气脱硫(FGD)废浆脱水系统代表了国内第一个偏离典型工业两级脱水系统设计的公用事业。在设计阶段进行的评估比较了三种脱水方案:1)串联浓缩机与真空过滤器,2)串联浓缩机与离心机,3)不带浓缩机的离心机。评价结果表明,不加浓缩机(一级)的离心机可以显著降低资本成本。加上资金成本,这种选择还降低了操作和维护成本,降低了系统的复杂性,节省了大量的空间,并将FGD和脱水系统集中在一个建筑物内。本文描述了在项目设计阶段进行的评估,比较了三种脱水方案。介绍了第一年的运行数据,讨论了运行和维护费用,并与常规两级脱水系统进行了比较。
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引用次数: 0
Captive insurance companies and the management of environmental risks 专属自保保险公司与环境风险管理
Pub Date : 1986-07-01 DOI: 10.1080/00022470.1986.10466113
R. Feldman, Danielle Rowley
Recent publicity has focused on the crisis in the market for commercial liability insurance. Industries and professionals concerned with air pollution are among those facing an acute shortage of insurance coverage. Captive insurance companies are gaining popularity as a means of securing comprehensive pollution liability coverage. Captives are separate corporations established by companies with similar risk management problems to write policies covering pollution emissions. Federal tax law requires that captives be set up properly, with transfer and distribution of risk, before premiums paid by the member companies are deductible. Financial responsibility requirements of the EPA are being redesigned, and may be favorable to the use of captives. Six states and several off-shore countries have statutes allowing captive insurance companies. Attention to practical details can lead to success in using captives to secure business advantages as well as protection from the risk of environmental impairment. Several of such considerations are discussed in light of the tax, environmental, and state regulatory issues relevant to the question, with an eye toward giving practical legal advice for structuring captives.
最近的宣传集中在商业责任保险市场的危机上。与空气污染有关的行业和专业人士都面临着保险范围严重不足的问题。专属自保保险公司作为一种获得全面污染责任保险的手段越来越受欢迎。自保公司是由具有类似风险管理问题的公司成立的独立公司,负责撰写污染排放保单。联邦税法要求,在成员公司支付的保费被扣除之前,必须适当地建立自保公司,转移和分配风险。EPA的财务责任要求正在重新设计,可能有利于圈养动物的使用。六个州和几个离岸国家有法律允许专属保险公司。对实际细节的关注可以成功地使用自保船,以确保商业优势,并保护免受环境损害的风险。根据与问题相关的税收、环境和州监管问题,讨论了其中的几个考虑因素,并着眼于为构建自保提供实用的法律建议。
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引用次数: 0
Direct Effects of Atmospheric Sulfate Deposition on Vegetation 大气硫酸盐沉降对植被的直接影响
Pub Date : 1986-07-01 DOI: 10.1080/00022470.1986.10466117
B. Chevone, D. Herzfeld, S. Krupa, A. Chappelka
Acid sulfate aerosol (500 μg/m3) had no effect on soybean or pinto bean after a single 4-h exposure. However, visible Injury and chlorophyll loss occurred when plants were sequentially exposed to acid aerosol and ozone (380 μg/m3) for 4 h. In yellow poplar seedlings exposed to ozone (200 μg/m3), sulfur dioxide (210 μg/m3) and simulated rain solutions (pH 5.6, 4.3 and 3.0) for 6 weeks, root dry weight, leaf area increase, mean relative growth rate and unit leaf rate decreased linearly with pH in ozone-treated plants. However, unit leaf rate and mean relative growth rate increased linearly in response to sulfur dioxide as solution acidity increased. Ambient wet and dry sulfate concentrations appear insufficient to directly impact vegetation.
酸性硫酸盐气溶胶(500 μg/m3)单次暴露4 h后对大豆和斑豆无影响。然而,在酸性气溶胶和臭氧(380 μg/m3)连续暴露4 h后,黄杨幼苗出现了明显的损伤和叶绿素损失。臭氧(200 μg/m3)、二氧化硫(210 μg/m3)和模拟雨水溶液(pH 5.6、4.3和3.0)暴露6周后,臭氧处理植株的根干重、叶面积增加,平均相对生长率和单位叶速率随pH呈线性下降。但随着溶液酸度的增加,单位叶片速率和平均相对生长率呈线性增加。周围的干湿硫酸盐浓度似乎不足以直接影响植被。
{"title":"Direct Effects of Atmospheric Sulfate Deposition on Vegetation","authors":"B. Chevone, D. Herzfeld, S. Krupa, A. Chappelka","doi":"10.1080/00022470.1986.10466117","DOIUrl":"https://doi.org/10.1080/00022470.1986.10466117","url":null,"abstract":"Acid sulfate aerosol (500 μg/m3) had no effect on soybean or pinto bean after a single 4-h exposure. However, visible Injury and chlorophyll loss occurred when plants were sequentially exposed to acid aerosol and ozone (380 μg/m3) for 4 h. In yellow poplar seedlings exposed to ozone (200 μg/m3), sulfur dioxide (210 μg/m3) and simulated rain solutions (pH 5.6, 4.3 and 3.0) for 6 weeks, root dry weight, leaf area increase, mean relative growth rate and unit leaf rate decreased linearly with pH in ozone-treated plants. However, unit leaf rate and mean relative growth rate increased linearly in response to sulfur dioxide as solution acidity increased. Ambient wet and dry sulfate concentrations appear insufficient to directly impact vegetation.","PeriodicalId":17188,"journal":{"name":"Journal of the Air Pollution Control Association","volume":"34 1","pages":"813-815"},"PeriodicalIF":0.0,"publicationDate":"1986-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89521903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Monitoring of benzene in ambient air with organic vapor badges 用有机汽标监测环境空气中的苯
Pub Date : 1986-07-01 DOI: 10.1080/00022470.1986.10466119
K. Fung, Barbara Wright
Benzene is a toxic substance commonly found in ambient air, especially in the urban environment. Benzene is an industrial solvent and is also a component of gasoline, typically present in concentrations of 1-2 percent. Evaporative emissions account for some of the benzene in ambient air. However, benzene can also be produced in combustion processes including those in automobiles and can be emitted with the exhaust into the environment. Recently, the California Air Resources Board (CARB) has identified benzene as the first pollutant to be controlled under its toxic air contaminant control program. Thus, there is a need for an accurate, reliable, low-cost technique for the routine monitoring of benzene. This paper compares monitoring methods. 6 references, 3 figures, 1 table.
苯是一种有毒物质,常见于环境空气中,尤其是城市环境中。苯是一种工业溶剂,也是汽油的一种成分,通常浓度为1- 2%。周围空气中的一些苯是由蒸发排放物产生的。然而,苯也可以在包括汽车在内的燃烧过程中产生,并随废气一起排放到环境中。最近,加州空气资源委员会(CARB)已将苯确定为其有毒空气污染物控制计划中要控制的第一种污染物。因此,需要一种准确、可靠、低成本的常规苯监测技术。本文对监测方法进行了比较。参考文献6篇,图3张,表1张。
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引用次数: 12
Practical incinerator implications from a fundamental flat flame study of dichloromethane combustion 二氯甲烷燃烧的基本平焰研究对实际焚化炉的影响
Pub Date : 1986-07-01 DOI: 10.1080/00022470.1986.10466121
V. Cundy, J. S. Morse, D. Senser
This paper discusses a number of results obtained from a hazardous waste flat flame combustion study with implications to full scale incinerators. The results demonstrate that it is possible to obtain DREs of up to 99.95 percent firing mixtures of CH2Cl2/CH4 and air in such a facility. These results are significant since residence times are at the millisecond level. The paper presents DRE results obtained with this CH2Cl2 flat flame system when systematically varying the chlorine loading and equivalence ratio within the flames. Additionally, a PIC DRE is defined as an alternative approach to measure total stack emissions. PIC DRE results are presented for systematic variation of chlorine loading and equivalence ratio. Based upon the data of the paper, a suggested two-stage incineration process is presented which may be both economically advantageous and result in less total PIC emissions as compared with conventional incinerators for certain wastes. The data of this work further indicate that it is kineti...
本文讨论了从危险废物平焰燃烧研究中获得的一些结果,这些结果对全规模焚化炉具有指导意义。结果表明,在这种装置中,燃烧CH2Cl2/CH4和空气的混合物,可以获得高达99.95%的DREs。这些结果很重要,因为停留时间是毫秒级的。本文介绍了该CH2Cl2扁平火焰系统在改变火焰中氯负荷和当量比时的DRE结果。此外,PIC DRE被定义为测量总烟囱排放的替代方法。给出了含氯量和当量比系统变化的PIC - DRE结果。根据本文的数据,提出了一种建议的两阶段焚化过程,与传统焚化炉相比,这种焚化过程既经济上有利,又能减少某些废物的总PIC排放。这项工作的数据进一步表明,它是动态的。
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引用次数: 9
期刊
Journal of the Air Pollution Control Association
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