【摘要】 为了研究焦化厂大气可吸入颗粒物(PM10)、梧桐叶片、土壤3介质中PAHs的污染特征、来源及相关性,连续1 a采其周边PM10、梧桐叶片及土壤样品,利用美国EPA8000系列方法进行分析.结果发现,PM10、梧桐叶片、土壤3种介质中PAHs总量年平均值分别为101.11 ng/m37、9.45 ng/g和121.53μg/g;PM10中苯并(a)蒽、苯并(g,h,i)、荧蒽、苯并(a)芘等高环数的多环芳烃占明显优势;在梧桐叶片中萘、苊、苯并(a)芘和苯并(g,h,i)的含量较高;土壤中苊烯、芘、苯并(a)蒽等3和4环的PAHs占较大比例.5月梧桐树叶中只含有苊和芘,而且浓度较低,分别为0.16 ng/g和0.63 ng/g;7、8月梧桐叶中PAHs总量显著提高,从39.19 ng/g上升到150.94 ng/g.通过相关性推断,焦化厂PAHs主要来源为复合污染;梧桐叶片中PAHs各组分浓度与土壤和PM10中各组分的浓度均具有极显著的相关性(p<0.01).更多还原

【Abstract】 In order to study the distributions characteristics,sources and relationship of PAHs in PM₁₀-phoenix tree leaves-soil system of a coking & chemical factory in Shanghai,the samples of PM₁₀,phoenix tree leaves and soil around the factory were collected for a year.The concentration of PAHs were analyzed according to the USEPA method（8?000） series.The results showed that the average concentration of PAHs in PM₁₀,phoenix tree leaves and soil were 101.11（ng/m³,）79.45（ng/g） and 121.53（μg/g,） respectively.Particulate phase(PM₁₀) contained mainly carcinogenic and mutagenic PAHs,among which BaA,BghiP,Flu and BaP were found at significant concentrations.In phoenix tree leaves,Nap,Chy,BaP and BghiP presented a higher level of concentration.In soil,3 and 4-ring PAHs presented a higher level.PAHs concentrations of phoenix tree leaves were very lower in May.Only Ace（0.16（ng/g）） and Pyr（0.63（ng/g）） were detected.In July and August the concentrations（39.19（ng/g） and 150.94（ng/g,）respectively） were uplifted significantly.It could be concluded PAHs was from petroleum and coal-fired compound source.There were very strong positive relationships of 16 PAHs level among phoenix tree leaves,soil and PM₁₀（p<0.01）.更多还原