摘要
为了解焦化厂在装煤过程中产生的PM_(2.5)及其周边区域空气环境PM_(2.5)中多环芳烃(PAHs)的含量,采用微纤维石英滤膜对PM_(2.5)采样,并通过气相色谱-质谱仪分析PM_(2.5)上负载的16种毒性较大PAHs。结果表明:焦炉装煤除尘烟气PM_(2.5)中PAHs的成分主要受到炼焦配煤的影响;布袋除尘器对装煤除尘烟气中高环PAHs的处理效果显著;焦化厂周边空气环境中PM_(2.5)中的PAHs浓度呈明显空间递减趋势。采用特征比值法分析得到该区域空气环境中PAHs主要来源于煤炭燃烧,用毒性当量法分析得到焦化厂区域PM_(2.5)中PAHs的毒性为其他区域的9~90倍,高环PAHs的毒性贡献较大。
To understand the content of PM_（2.5） produced in coking plant coaling process and the polycyclic aromatic hydrocarbons （PAHs） content in PM_（2.5） in the surrounding air,microfiber quartz filterable membrane was used to collect the PM_（2.5） and 16 kinds of toxic PAHs attached on PM_（2.5） were analyzed by Gas ChromatographyMass Spectrometer.The results showed that the PAHs composition in PM_（2.5） were mainly influenced by coking coal.The high molecular weight PAHs could be removed effectively by the bag-filter.The concentration of PAHs in PM_（2.5） in the surrounding environment of coking plant showed a decreasing trend based on location.The characteristic ratio analysis of PAHs in the air of the region indicated that PAHs in the air of the region are mainly from coal combustion.The toxicity of PAHs in PM_（2.5） of coking plant was 9 to 90 times of that of other regions according to the evaluation of toxic equivalent quantity,the high molecular weight PAHs made a greater contribution to total toxicity.
作者
张惠灵
王宇
周杨
任大军
王梦婵
ZHANG Huiling WANG Yu ZHOU Yang REN Dajun WANG Mengchan(College of Resource and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2017年第10期5571-5576,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51476118)
煤转化与新型炭材料湖北省重点实验室开放基金(WKDM201303)
关键词
焦化厂
PM2.5
多环芳烃(PAHs)
特征比值法
排放特征
毒性当量
coking plant
PM2.5
polycyclic aromatic hydrocarbons（PAHs）
characteristic ratio
emission charac teristic
toxic equivalent quantity
