【摘要】 采集某化工厂退役场地31件表层土壤样品,运用高效液相色谱-荧光-紫外检测器串联气相色谱法分析了美国环保局优先控制的16种多环芳烃的含量、组分特征及来源。结果表明,多环芳烃在化工厂区内普遍存在,其中荧蒽、芘、苯并[a]蒽、屈、苯并[b]荧蒽、苯并[a]芘等多环芳烃检出率高达90%以上,单点检出最高值分别达2904ng/g、7469ng/g、2150ng/g、2299ng/g、909ng/g、1183ng/g,且4环以上多环芳烃明显占优。化工厂区土壤中多环芳烃含量在35.6～28771ng/g,平均值为2496.3ng/g;苯并[a]芘和二苯并[a,h]蒽最大检测值(1183ng/g和628ng/g)超出了第Ⅰ类用地标准(550ng/g)没有超出第Ⅱ类用地标准(1500ng/g),其它指标没有超出相关标准,表明该区域内土壤已经受到了不同程度的污染,该区域表层土壤存在潜在的环境风险,需要采取一定的风险管控等措施来减少造成的危害。更多还原

【Abstract】 Concentrations and composition of 16 polycyclic aromatic hydrocarbons(PAHs) listed for prior control by US EPA are detected to analyze 31 surface soil samples from a chemical industrial area with a gas chromatography equipped with mass spectrometry(GC/MS). The characteristics and contamination sources of PAHs are discussed. The results show that there exist 16 PAHs in surface soil samples, of which phenanthrene, fluorene, pyrene, benzo[a] anthracene, chrysene, benzo[b] fluoranthene and benzo[a] pyrene have high contents with the highest ones respectively up to 9342 ng/g, 2904 ng/g, 7469 ng/g, 2150 ng/g, 2299 ng/g, 909 ng/g, 1183 ng/g. The high-ring(4-,5-and 6-ring) PAHs account for more than 70% of total PAHs. Contents of ∑PAHs vary from 35.6 ng/g to 28 771 ng/g, averaging 2496.3 ng/g, showing the surface soil being polluted in different extent.更多还原