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).
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/m^3, 79.45 ng/g and 121.53 μg/g, respectively. Particulate phase （PMlo） 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 ）.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2007年第8期1802-1805,共4页
Environmental Science
基金
国家重点基础研究发展规划(973)项目(2003CB415003)
关键词
焦化厂
PM10
梧桐叶片
土壤
PAHS
coking ＆ chemical factory
PM10
phoenix tree leaves
soil
PAHs
作者简介
程金平（1973～），男，博士，副教授，主要研究方向为环境化学与生态毒理，E-mail：jpeheng@sjtu．edu．cn
