焦化厂环境粉尘中多环芳烃分布特征的研究

Study on the Distribution Regularity of PAHs in the Coking Dust from the Coking Environment

通过超声波萃取和高效液相色谱方法,对炼焦过程粉尘中富含的多环芳烃(PAHs)进行了分析。数据显示,炼焦一车间环境粉尘中PAHs的质量浓度最高,达12.00μg/m3。从粉尘中PAHs单组分的分布特征来看,5个点位粉尘样品中共检出14种PAHs;通过对不同粒径的粉尘中多环芳烃的分布特征分析发现,粉尘中PAHs主要集中在10μm以下的粉尘中即PM10中,均超过了75%;环境粉尘中苯并[a]芘的浓度超过了国家规定的污染物排放标准,会对职工的健康产生较大影响。

The paper conducts a comparative study and analysis of five kinds of dust samples of the different environment in coking plant and obtains the distribution regularity of PAHs in the coking dust by the way of ultrasonic extraction and high performance liquid chromatography.The results of analysis prove that among the five kinds of dust samples,the PAHs from the first workshop turns out to be the richest with its content getting up to 12.00 μg/m3;though analyzing the single component distribution of PAHs,the results show that there are fourteen kinds of PAHs produced in the environment;through analyzing the particle size of coking dust,its size is mainly below 10 μm and its contents exceed to 75%;the concentration of the benzopyrene,which is beyond the standard of the national,will be harmful to the coking workers＇health.