摘要
以一种烟煤和一种无烟煤制成的蜂窝煤为研究对象 ,采用一套稀释采样系统同时采集蜂窝煤燃烧烟气中颗粒相和气相中的有机物 ,利用GC -MS对其中的多环芳烃(PAHs)进行定量研究并对比原煤的二氯甲烷抽提物 ,发现烟煤不仅在原煤中就含有比无烟煤高出很多倍的PAHs和苯并(a)芘致癌性当量 ,而且在家用煤炉中燃烧后会产生更多的PAHs和致癌性 ;而无烟煤在燃烧后PAHs和毒性当量均会大大减少。燃煤烟气中以气相形态存在的PAHs在总量上占相当比例 ,但在致癌性当量上以颗粒相占主要部分。因此 ,在选择家用燃煤时除了要尽量使用无烟煤外 。
A bituminous and an anthracite coal were selected as fuel for the preparation of residential honˉeycomb coal briquettes.Polycyclic aromatic hydrocarbons(PAHs)in both gaseous and particulate emisˉsions fromcoal briquette combustion were quantified by GC-MS and compared with those in rawcoal exˉtracts usingdichloromethane(DCM)as solvent.Bituminous coal contains PAHs withbenzo(a)pyrene_equivˉalent carcinogenic potency(BaPeq)values many times higher than those in anthracite.Much more PAHs and BaPeq were formed during bituminous coal briquette combustion in residential stoves,as compared with anthracite combustion.Although PAHs in the gaseous emissions contribute a pronounced percentage of the total amountof PAHs emitted,nevertheless PAHs in the particulate phase dominate the total carcinoˉgenic potency.Anthracite instead of bituminous coal should be used as residential fuel,and particulate_ removal devices should be applied as well.
出处
《分析测试学报》
CAS
CSCD
北大核心
2004年第5期85-88,共4页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目 (4013010)
关键词
家用燃煤
多环芳烃
苯并(a)芘致癌性当量
气相
颗粒相
GC-MS
Residential coal combustion
Polycyclic aromatic hydrocarbons(PAHs)
Benzo(a)pyrene- equivalent carcinogenic potency(BaPeq)
Gaseous phase
Particulate phase
GC-MS
