A Study on Dynamic Volatile Organic Compound Emission Characterization of Water-Based Paints

被引:29
作者
Chang, Yu-Min [1 ]
Hu, Wei-Hsing [1 ]
Fang, Wen-Bing [1 ]
Chen, Shiao-Shing [1 ]
Chang, Chang-Tang [2 ]
Ching, Hsiao-Wei [3 ]
机构
[1] Natl Taipei Univ Technol, Grad Inst Environm Engn & Management, Taipei 10608, Taiwan
[2] I Lan Univ, Dept Environm Engn, Ilan, Taiwan
[3] Tungnan Univ, Dept Safety Hlth & Environm, Taipei, Taiwan
关键词
TRANSFER-BASED MODEL; MASS-TRANSFER MODEL; VOC EMISSIONS; BUILDING-MATERIALS; DIFFUSION; COEFFICIENTS; SIMULATION; PREDICTION;
D O I
10.3155/1047-3289.61.1.35
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Volatile organic compounds (VOCs) emitted from surface coatings have caused growing public concern for air quality. Even the low-emitted VOC impact from water-based paints on indoor. air quality in urban areas has caused concern. This paper presents experimental data using a mathematical model to simulate dynamic VOC emissions from water-based paints that is based on mass transfer and molecular diffusion theories. A series of field-analogous experiments were carried out to continuously measure the VOCs emitted from two typical water-based paints using a gas chromatography flame-ionization detector monitor in an artificial wind tunnel system. In the study cases, the mass flux of VOCs emitted from the water-based paints was up to 50 mu g/m(2)sec. It was found that the time needed to completely emit VOCs from water-based paints is just hundreds of seconds. However, the order of magnitude of the VOC emission rate from water-based paints is not lower than that from some dry building materials and solvent-based paints. The experimental data were used to produce a useful semiempirical correlation to estimate the VOC emission rates for water-based paints. This correlation is valid under appropriate conditions as suggested by this work with a statistical deviation of +/- 7.6%. With this correlation, it seems feasible to predict the dynamic emission rates for VOCs during a painting process. This correlation is applicable for assessing the hazardous air pollutant impact on indoor air quality or for environmental risk assessment. Associated with the dynamic VOC emission characterization, the air-exchange rate effect on the VOC emission rates is also discussed.
引用
收藏
页码:35 / 45
页数:11
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