煤矸石堆放地周围土壤中多环芳烃的污染特性及评价

重点研究了煤矸石堆场周围土壤中的多环芳烃（PAHs）的污染特性及其与煤矸石的相关性．研究结果表明：煤矸石及其堆场周边土壤中，均检测出PAHs的存在，其中煤矸石PAHs总含量为2．86mg／kg，土壤PAHs总含量为0．64mg／kg；土壤和煤矸石中的PAHs在五环以上的高分子种类有着很好的相关性，但低分子PAHs相关性一般，且PAHs种类分布特征和不同环数PAHs分布特征均有明显差异；依照《加拿大土壤环境质量标准农用地标准》，煤矸石周边土壤已明显处于受污染的超标状态．

Evaluation of PAHS pollution in soil around coal gangue storage yard

Pollution characteristics of polycyclic aromatic hydrocarbons （PAHs） around coal gangue yard were studied, especially for the relationship between the characteristics and PAHs. The experimental results indicated that PAHs was detected in the soil a- round the coal gangue yard in which total PAHs in coal gangue were 2.86 mg/kg and 0.64 mg/kg in surrounding soil. There were better relative for organic polymer with more than five-membered ring between coal gangue and soil, but general correlation for low molecular weight of organic polymer, and the distribution of PAHs species were obviously different from PAHs with different ring were obviously different. According to environmental quality standard for agricultural soil in Canada, it was proved that the soil bad been polluted by coal gangue.