蚊香和佛香燃烧过程中苯系物的排放研究

利用小型烟雾箱对6种市售蚊香和5种佛香燃烧过程进行采样研究,定量分析释放的5种苯系物(苯、甲苯、乙苯、对/间二甲苯、邻二甲苯),利用单室质量平衡模型分别计算排放系数.结果表明,蚊香和佛香的不同品牌之间苯系物的排放系数相差较大,蚊香中5种苯系物的平均排放因子分别是77,101,94,250,94μg/g,佛香中5种苯系物的平均排放因子依次是732,598,2084,2349,221μg/g.蚊香与佛香燃烧释放物中含量最高的苯系物均是间/对二甲苯,分别占总含量的41%、39%.取测得的最大排放速率,采用室内空气质量模型模拟一般条件下蚊香和佛香燃烧释放苯系物对室内空气的影响,分析结果显示,燃烧蚊香造成室内苯、甲苯和乙苯的最大模拟浓度分别是31,45,86μg/m3,燃烧佛香造成室内苯、甲苯和乙苯的最大模拟浓度为65,66,187μg/m3.

BTEX from burning mosquito coils and incense sticks.

Emission characteristics of BTEX that include benzene, toluene, ethylbenzene, m, p-xylene and o-xylenes, from 6 brands of mosquito coils and 5 brands of incense sticks burning in a small test chamber were studied. The emission coefficients of BTEX from either brands of mosquito coils or incense sticks were different. The average emission factors of BTEX in smoke from mosquito coils were 77, 101, 94, 250 and 94μg/g, respectively. For incense sticks the average emission factors were 732, 598, 2084, 2349 and 221μg/g. m, p-xylene was the most abundant BTEX from both mosquito coils and incense sticks, accounting for 41% and 39% of total BTET concentrations respectively. With the emission rates measured by this study, indoor air quality model was used to simulate the concentrations of BTXT in indoor environment. The highest indoor concentrations of benzene, toluene and ethylbenzene from the burning mosquito coil were 31μg/m3, 45μg/m3 and 86μg/m3 respectively, and the highest indoor concentrations of these compounds from the burning incense sticks were 65μg/m3, 66μg/m3 and 187μg/m3 respectively.