| 甘肃省农业土壤邻苯二甲酸酯累积特征及来源分析 |
| 摘要点击 3183 全文点击 834 投稿时间：2021-11-30 修订日期：2022-02-12 |
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| 中文关键词 农业土壤 邻苯二甲酸酯(PAEs) 土壤PAEs累积 PAEs单体 地膜残留 |
| 英文关键词 agricultural soil phthalates esters (PAEs) accumulation of PAEs in soil monomers of PAEs plastic mulching residue |
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| 中文摘要 |
| 为了解甘肃省农业土壤中邻苯二甲酸酯（PAEs）的组成及累积特征，采集了甘肃省4种农业土壤共41个土壤样品，利用气相色谱单四级杆质谱联用仪（GC-MS）分析了6种PAEs化合物含量.结果表明，甘肃省农业土壤中6种PAEs化合物，平均值为432.4 μg ·kg-1，土壤中DMP、DEP、DnBP、DEHP和DNOP检出率为100%，BBP均未检出.甘肃省4种农业土壤PAEs平均值大小顺序依次为：温室>农田（露地）>森林>草原，参照美国土壤6种优控的PAEs控制标准，邻苯二甲酸二正丁酯（DnBP）、邻苯二甲酸二甲酯（DMP）和邻苯二甲酸二乙酯（DEP）超标率分别为94%、28%和27%，其余3种均未超标.不同农业土壤中的PAEs组成由于其来源不同而具有差异性，6种不同PAEs单体中DEHP和DnBP组分占比较高，是甘肃省农业土壤中PAEs的主要污染物.本研究中土壤PAEs、DEHP含量分别与农田地膜残留量呈显著的正相关关系（P <0.05）.总体上，甘肃省河西地区土壤PAEs含量明显高于陇东地区. |
| 英文摘要 |
| In order to understand the composition and accumulation characteristics of phthalates esters (PAEs) in agricultural soils in Gansu province, a total of 41 soil samples from four agricultural soils in Gansu province were collected, and the content of six PAEs compounds was analyzed using a gas chromatography-single quadrupole mass spectrometer (GC-MS). The results showed that the average value of PAEs compounds in agricultural soils in Gansu province was 432.4 μg·kg-1. The detection rates of DMP, DEP, DnBP, DEHP, and DNOP in the soil were 100%, and BBP was not detected. The order of the average value of PAEs content in the four agricultural soils in Gansu province was:greenhouse>farmland (open field)>forest>grassland. The exceeding rates of dibutyl phthalate (DnBP), dimethyl phthalate (DMP), and dimethyl phthalate (DEP) were 94%, 28%, and 27%, and the remaining three did not exceed the standard. The composition of PAEs in different agricultural soils was different due to their different sources. DEHP and DnBP components in the six different PAEs monomers accounted for a higher proportion and were the main pollutants of PAEs in agricultural soils in Gansu province. In this study, the contents of soil PAEs and DEHP were significantly positively correlated with the residual amount of mulch film in the farmland (P<0.05). In general, the content of soil PAEs in the Hexi area of Gansu province was significantly higher than that in the Longdong area. |
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