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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Pollution assessment, distribution and sources of PAHs in agricultural soils of Pearl River Delta-The biggest manufacturing Base in China
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Pollution assessment, distribution and sources of PAHs in agricultural soils of Pearl River Delta-The biggest manufacturing Base in China

机译：珠江三角洲农业土壤中多环芳烃的污染评估，分布和来源-中国最大的制造业基地

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摘要

A large scale of soil survey was performed to determine the contents, distributions and sources of 16 polycyclic aromatic hydrocarbons (PAHs) in 231 agricultural soils under 3 land-use types from 5 regions of the subtropical Pearl River Delta (PRD). The average sum of 16 PAHs in all soil samples is 316.5 μg·kg~(-1), with range from ND to 4079 μg·kg~(-1). Three- and 4-ring PAHs are the most abundant PAHs that contribute to 73.0% of total contents. The most abundant components are phenanthrene, benzo(b)fluoranthene and fluoranthene. ANOVA and principal component analyses (PCA) indicate that soil samples from Dongguan and Zhongshan contain greater PAHs than other regions. More abundant carcinogenic and higher molecular weight PAHs accumulated in soils from Dongguan and Zhongshan, while higher low molecular weight PAHs were in soils from Guanghzou, Huizhou and Shunde. Soil PAHs from 3 land uses are not statistically different. Additionally, 5 PAH compound ratios suggest that soil PAHs in PRD derived from mixture of pyrogenic and petrogenic sources, but the majorities are pyrogenic sources. PAHs were further identified as mixture of petroleum combustion and grass, wood, and coal combustion. Some soil PAHs were revealed vehicle emission, coal soot and petroleum sources. The 5 regions showed different PAHs sources according to some compound ratios, but no marked distinction between regions from 2 banks of the Pearl River because of major wind direction, distribution of riverway and industry.
机译：进行了大规模的土壤调查，以确定亚热带珠江三角洲（PRD）5个地区的3种土地利用类型下的231种农业土壤中16种多环芳烃的含量，分布和来源。所有土壤样品中16种多环芳烃的平均含量为316.5μg·kg〜（-1），范围从ND到4079μg·kg〜（-1）。三环和四环PAH是最丰富的PAH，占总含量的73.0％。最丰富的成分是菲，苯并（b）荧蒽和荧蒽。方差分析和主成分分析（PCA）表明，东莞和中山的土壤样品中的多环芳烃含量高于其他地区。东莞和中山的土壤中积累了更丰富的致癌物质和较高分子量的PAHs，而广州，惠州和顺德的土壤中积累了较高的低分子量PAHs。 3种土地利用的土壤多环芳烃在统计上没有差异。此外，有5种PAH的化合物比率表明，珠三角地区的土壤PAHs来源于热源和岩石成因的混合物，但多数是热源。多环芳烃还被确定为石油燃烧与草，木材和煤炭燃烧的混合物。一些土壤多环芳烃被发现为汽车排放物，煤烟和石油来源。 5个地区根据某些混合比显示出不同的PAHs来源，但由于主要的风向，河道分布和工业分布，珠江两岸的地区之间没有明显区别。

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