厦门岛表土中多环芳烃来源分析及健康风险评估

Source Analysis and Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in the Topsoil of Xiamen Island

对厦门岛不同功能区表土中多环芳烃（PAHs）进行分析，PAHs分布范围为82．54～8845．09μg／kg，不同功能区土样中PAHs浓度趋势为工业区〉商业区〉居民区〉其它公共区域〉风景区〉农业区．三角图解法、欧氏距离法和多元变量统计法分析结果表明，岛内土样中PAHs来源以交通源、汽油源和柴油源为主，香烟源和烹调源影响较小．以苯并（a）芘的等效致癌毒性（BEQ）评价PAHs对人体健康的威胁，发现除农业区外，其他区域的BEQ水平均不同程度超出荷兰标准或加拿大标准，说明岛内土壤中PAHs对人体的健康有潜在威胁．

The source of polycyclic aromatic hydrocarbons （PAHs） in topsoil of different function areas in Xiamen Island was ana- lyzed by Ternary plot,Euclidean distance and Multivariable methods, Distribution of total PAHs concentration in different function areas varied from 82.54 to 8 845.09μg/kg, with the concentration order as follows： industrial estate〉 sowntown〉 residential〉 other public places〉scenic area〉 farm belt. Results from statistical congruously presented that vehicular exhaust, gasoline exhaust and diesel exhaust contributed to the main production of PAHs in Xiamen Island,whereas smoke and cook exhaust displayed insignificant effects on PAHs generation. Analysis from the health risk assessment of PAHs with benzo[a]pyrene equivalency quality （BEQ） suggested that BEQ in different function areas except farm belt had potential impacts on public health.