南京有机污染风险区农田土壤多环芳烃污染状况研究

发布时间：2019-03-05 07:28

【摘要】：采集南京地区不同有机污染风险区农田表层土壤,用超快速液相色谱仪检测样品中15种EPA优控的多环芳烃(PAHs)含量。结果表明,被检农田土壤多环芳烃总量分布于306.0~1251.3μg kg~(-1)之间,均值682.0μg kg~(-1),四环以上高环多环芳烃占较大比例(80%)。根据欧洲土壤质量标准,所检土壤样本已达污染水平。不同风险污染区农田土壤PAHs的含量由高至低为:钢铁工业区、有机垃圾处理区、化工工业区及炼油工业区。钢铁工业区附近主要的污染物为荧蒽、芘、屈和苯并[a]蒽,分别占到污染物总量的16%、13%、10%和10%。采用荧蒽/(荧蒽+芘)与茚并[1,2,3-cd]芘/(茚并[1,2,3-cd]芘+苯并[g,h,i]傒)比值对各地污染物来源进行分析,结果发现调查区域的PAHs污染物以燃烧源为主,生物质燃料为主要污染物,部分地区同时有石油燃烧污染。
[Abstract]:The (PAHs) contents of 15 kinds of polycyclic aromatic hydrocarbons (PAHs) in the samples were determined by ultra-rapid liquid chromatography (ultra-rapid liquid chromatography) from farmland topsoil samples from different organic pollution risk areas in Nanjing. The results showed that the total PAHs in the tested soil ranged from 306.0 渭 g kg~ (- 1) to 1251.3 渭 g kg~ (- 1), the average value was 682.0 渭 g PAHs (- 1), and the high PAHs above tetracyclic rings accounted for 80% of the total PAHs. According to the European soil quality standards, the tested soil samples have reached the pollution level. The contents of PAHs in farmland soil from high to low in different risk polluted areas were as follows: iron and steel industrial zone, organic waste treatment area, chemical industrial zone and refining industrial area. Fluoranthene, pyrene, flexion and benzo [a] anthracene accounted for 16%, 13%, 10% and 10% of the total pollutants, respectively. The ratio of fluoranthene / (fluoranthrene) to indene [1,2, 3? CD] pyrene / (indene [1,2,3? CD] pyrene benzo [g, h, I]?) was used to analyze the source of pollutants. The results showed that the PAHs pollutants in the investigated area were mainly combustion source, biomass fuel was the main pollutant, and petroleum combustion pollution was also found in some areas.
【作者单位】：中国科学院土壤环境与污染修复重点实验室(南京土壤研究所);中国科学院南京土壤研究所-香港浸会大学土壤与环境联合开放实验室;中国科学院大学;
【基金】：国家973计划(2014CB441106) 国家自然科学基金(41201301) 江苏省自然科学基金(BK20131462)资助
【分类号】：X53

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