Atmospheric Environment (1967)最新文献_第3页

Overview of the gas phase retention volume behavior of organic compounds on polyurethane foam 有机化合物在聚氨酯泡沫上的气相保留体积行为综述

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90311-9

James F. Pankow

{"title":"Overview of the gas phase retention volume behavior of organic compounds on polyurethane foam","authors":"James F. Pankow","doi":"10.1016/0004-6981(89)90311-9","DOIUrl":"10.1016/0004-6981(89)90311-9","url":null,"abstract":"<div>There is a need to be able to predict the compound-dependent volumes of gas that can be sampled with little breakthrough using porous polyurethane foam (PUF). Gas/solid sorption theory predicts that the specific retention volume per gram of sorbent at temperature T(K) (Vg.T., m3 g−1) should correlate with the vapor pressure of the pure compound (pTo-, torr) at T. For compounds that are solids at the T of interest, the vapor pressure of the sub-cooled liquid (pLo,T) should be used. For polyether-type PUF that has a density of ~ 0.022 g cm−3, regressions of available data lead to the following correlation equations: (1) polycyclic aromatic hydrocarbons, log Vg,293 = −1.195 logpL,293o−1.884 (r2 = 0.989); and (2) organochlorine compounds, log Vg,293= −1.059 logpL,293o−1.764 (r2 = 0.950). These equations will be useful in predicting retention volumes for compounds whose behavior on PUF have not as yet been studied. If the entropy of desorption for a given compound from PUF is equal to the entropy of desorption from the pure form of the compound, then the'available data indicate that the difference between the enthalpy of desorption from PUF and the enthalpy of vaporization of the pure compound is about 6 kcal mol−1 for both the PAHs and the organochlorine compounds.</div>","PeriodicalId":100138,"journal":{"name":"Atmospheric Environment (1967)","volume":"23 5","pages":"Pages 1107-1111"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0004-6981(89)90311-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52835344","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: 39

The possible role of H2O2 in new-type forest decline H2O2在新型森林衰退中的可能作用

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90430-7

D. Möller

引用次数: 55

A simulation of wind and air pollution over complex terrain using a hydrostatic numerical model 用流体静力数值模式模拟复杂地形上的风和空气污染

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90474-5

Fujio Kimura

引用次数: 3

A review of recent field tests and mathematical modelling of atmospheric dispersion of large spills of Denser-than-air gases 最近现场试验的回顾和比空气密度大的气体泄漏在大气中扩散的数学模型

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90475-7

Ronald P. Koopman, Donald L. Ermak, Stevens T. Chan

{"title":"A review of recent field tests and mathematical modelling of atmospheric dispersion of large spills of Denser-than-air gases","authors":"Ronald P. Koopman, Donald L. Ermak, Stevens T. Chan","doi":"10.1016/0004-6981(89)90475-7","DOIUrl":"10.1016/0004-6981(89)90475-7","url":null,"abstract":"<div>Large-scale spills of hazardous materials often produce gas clouds which are denser than air. The dominant physical processes which occur during dense-gas dispersion are very different from those recognized for trace gas releases in the atmosphere. Most important among these processes are stable stratification and gravity flow. Dense-gas flows displace the ambient atmospheric flow and modify ambient turbulent mixing. Thermodynamic and chemical reactions can also contribute to dense-gas effects. Some materials flash to aerosol and vapor when released and the aerosol can remain airborne, evaporating as it moves downwind, causing the cloud to remain cold and dense for long distances downwind. Dense-gas dispersion models, which include phase change and terrain effects have been developed and are capable of simulating many possible accidental releases. A number of large-scale field tests with hazardous materials such as liquefied natural gas (LNG), ammonia (NH3), hydrofluoric acid(HF) and nitrogen tetroxide(N2O4) have been performed and used to evaluate models. The tests have shown that gas concentrations up to ten times higher than those predicted by trace gas models can occur due to aerosols and other dense-gas effects. A methodology for model evaluation has been developed which is based on the important physical characteristics of dense-gas releases.</div>","PeriodicalId":100138,"journal":{"name":"Atmospheric Environment (1967)","volume":"23 4","pages":"Pages 731-745"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0004-6981(89)90475-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52835716","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: 43

The ages of gaia, a biography of our living earth 盖亚时代，我们地球的传记

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90428-9

James P. Lodge Jr

引用次数: 4

Background trends of pH of precipitation over India 印度降水pH值的背景趋势

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90476-9

G.S. Varma

引用次数: 22

Separation and determination of organics in air particulate matters using a new technique, low-volume liquid chromatography 用小体积液相色谱法分离测定空气颗粒物中的有机物

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90492-7

Shi-Wei Zhou ∗, Gai-Ying Ren, Shu-Yi Yu

引用次数: 2

Initial efficiencies of air cleaners for the removal of nitrogen dioxide and volatile organic compounds 空气净化器去除二氧化氮和挥发性有机化合物的初始效率

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90514-3

J.M. Daisey, A.T. Hodgson

{"title":"Initial efficiencies of air cleaners for the removal of nitrogen dioxide and volatile organic compounds","authors":"J.M. Daisey, A.T. Hodgson","doi":"10.1016/0004-6981(89)90514-3","DOIUrl":"10.1016/0004-6981(89)90514-3","url":null,"abstract":"<div>The objective of this research was to measure the initial effective cleaning rates (ECRs) of selected air cleaners for removing nitrogen dioxide (NO2) and six representative volatile organic compounds (VOC) from air. Four portable air cleaners, representing different principles of particle removal and incorporating activated carbon, were investigated. Experiments were conducted in a closed room-size environmental chamber using analyte concentrations similar to those reported in residences. Effects of relative humidity, temperature, filter particle loading and saturation of the adsorbents on the ECRs were not investigated in this preliminary study. However, the effect of extended usage was investigated for one air cleaner.Two of the air cleaners were found to be reasonably effective initially in removing NO2 and five of the six VOC. These two devices had relatively high flow rates and the greatest amounts of activated carbon. None of the devices removed dichloromethane, the VOC with the highest vapor pressure. One air cleaner emitted 1,1,1-trichloroethane and formaldehyde. After being used in a residence for 150 h, the ECRs for the air cleaner which had the highest initial values decreased to 50% or less of the initial ECRs. This use was only about 15% of the recommended filter lifetime. Conversion of NO2 to NO was also observed for this device but only after it had been used in the residence.</div>","PeriodicalId":100138,"journal":{"name":"Atmospheric Environment (1967)","volume":"23 9","pages":"Pages 1885-1892"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0004-6981(89)90514-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"52835996","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: 17

Author's reply 作者的回复

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90323-5

Sotirios Glavas

引用次数: 0

C1- and C2-halocarbons in soil-air of forests 森林土壤-空气中的C1-和c2 -卤化碳

Atmospheric Environment (1967) Pub Date : 1989-01-01 Epub Date: 2003-05-14 DOI: 10.1016/0004-6981(89)90156-X

H. Frank, W. Frank, D. Thiel

引用次数: 43