【摘要】 对广州 (含增城、花都 )和深圳地区的 9个代表性蔬菜生产基地进行调查采样 ,利用超声波提取 -硅胶柱净化 -气相色谱 /质谱联机检测技术 (GC/ MS) ,分析了土壤中属于 U.S.EPA优控污染物的 6种邻苯二甲酸酯 (PAEs)化合物。结果表明 ,6种PAEs化合物总含量 (Σ PAEs)在 3.0 0～ 4 5 .6 7mg/ kg之间 ,其中 37%样品的Σ PAEs在 10～ 2 0 mg/ kg,2 2 %样品的Σ PAEs在2 0～ 30 m g/ kg。各蔬菜基地中以联兴基地的 Σ PAEs平均值最高 (35 .6 2 m g/ kg) ;广清基地的 Σ PAEs平均值最低 (10 .31m g/kg)。各 PAEs化合物中以 DEHP的含量最高 ,Dn BP次之 ,两者共占 Σ PAEs的 90 %以上。BBP、DEP、DMP和 Dn OP的含量均在 2 .0 mg/ kg以下。与美国土壤 PAEs控制标准相比 ,除了 Dn OP外 ,其余 5个化合物均不同程度超标 ,其中 DEP、Dn OP、DEHP超标较普遍且较严重。但所有 PAEs化合物的含量均低于美国土壤 PAEs治理标准。总体上看 ,上述蔬菜基地土壤中PAEs的含量较高 ,说明受到了不同程度的污染更多还原

【Abstract】 Six U.S.EPA priority pollutants of phthalic acid esters (PAEs) including di-methyl phthalate (DMP), di-ethyl phthalate (DEP), di-n-butyl phthalate (DnBP), butylbenyl phthalate (BBP), di-(2-ethylhexyl) phthalate (DEHP), and di-n-octyl phthalate (DnOP) in twenty seven soil samples from nine typical vegetable fields in areas of Guangzhou and Shenzhen, South China were determined by gas chromatography-mass spectrometry (GC-MS).Total contents of the six PAE compounds (ΣPAEs) in all soils ranged from 3.00 to 45.67mg/kg, with 37% of total samples ranging from 10 to 20 mg/kg and 22% of total samples ranging from 20 to 30 mg/kg. For each single field the highest average ΣPAEs was observed in Lianxing field with 35.62mg/kg, and the lowest average ΣPAEs in Guangqing field with 10.31mg/kg. For each single PAE compound, concentrations of DEHP were highest(2.8～25.1mg/kg), followed by DnBP, both comprising over 90% of ΣPAEs. The concentrations of other four compounds were all less than 2.0mg/kg respectively, together amounting to <5% of ΣPAEs. On the whole the concentrations of PAEs in vegetable soils from the above areas were higher than those reported in other countries. Moreover, the concentrations of all five PAE compounds with the exception of DnOP exceeded the control limits of PAEs in soil of U.S.A. to a various extent, especially DEP, DnOP, and DEHP exceeding more commonly and more seriously.更多还原