نتایج جستجو برای: vocs pollution
تعداد نتایج: 72930 فیلتر نتایج به سال:
The aim of the study was to assess the level of air pollution by volatile organic compounds (VOCs) in a pig fattening house and in its vicinity. Air samples for chromatographic analysis were taken in the fattening house and in the vicinity of the farm. The air quality study shows that the level of organic gaseous pollutants was twice as high in the fattening house as in the atmospheric air. Alm...
Enhanced volatile organic compounds (VOCs) observations were made on ozone-exceeding days in June 2020 Linyi, China. A total of 69 VOCs collected (1 alkyne, 29 alkanes, 10 alkenes, 14 aromatic hydrocarbons, and 15 oxygenated (OVOCs)). The average concentration (TVOCs) was 36.0 ± 0.66 ppb, the top three components OVOCs, which accounted for 40.75%, 27.02%, 11.30%, respectively. Based positive ma...
Bake-out with dilution ventilation is a potential technology that can shorten emission cycle of indoor VOCs and other hazardous gas, and then reduce indoor environment pollution brought forward by building materials. This technology based on characteristic that chemical substance of building materials is easier to emit under high temperature. This paper used numerical value method to compute TV...
Tropospheric air pollution: ozone, airborne toxics, polycyclic aromatic hydrocarbons, and particles.
Tropospheric air pollution has impacts on scales ranging from local to global. Reactive intermediates in the oxidation of mixtures of volatile organic compounds (VOCs) and oxides of nitrogen (NOx) play central roles: the hydroxyl radical (OH), during the day; the nitrate radical (NO3), at night; and ozone (O3), which contributes during the day and night. Halogen atoms can also play a role durin...
Human exposures to volatile organic compounds (VOCs) are associated with a wide range of health problems. Due to these adverse effects of VOCs on the human health, determination of trace levels of VOCs is very important for accurate assessment of indoor and outdoor exposure. Solid phase microextraction (SPME), needle trap device (NTD) and hollow fiber- liquid phase microextraction (HF-LPME) are...
Air pollution is the environmental factor with the greatest impact on human health in Europe. Understanding the key processes driving air quality across the relevant spatial scales, especially during pollution exceedances and episodes, is essential to provide effective predictions for both policymakers and the public. It is particularly important for policy regulators to understand the drivers ...
OBJECTIVES As a part of the worldwide European Community respiratory health survey, possible relations between symptoms of asthma, building characteristics, and indoor concentration of volatile organic compounds (VOCs) in dwellings were studied. METHODS The study comprised 88 subjects, aged 20-45 years, from the general population in Uppsala, a mid-Swedish urban community, selected by stratif...
Air pollution caused by traffic transportation, fuel combustions and volatile organic compounds (VOCs) composition of gasoline, has progressed to be a serious health problem in Bangkok, Thailand, especially among occupational workers as gasoline station workers (Land transportation department, 2000; Muttamara and Leong, 2000). Exposure to gasoline vapors is classified by the International Agenc...
This paper selectively reviews scientific research on the positive effects on building occupant’s health, well-being and productivity that result from the presence of indoor plants in the workplace. Case studies show improvement in indoor air quality, (with a reduction in the levels of volatile organic compounds (VOCs), improved productivity by up to 12%, and reduced absenteeism and staff turno...
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