石油化工污染土壤中萘的生态风险评价

Ecological risk assessment of naphthalene in the soil of a petrochemicals-contaminated site.

分别用点估计商、暴露分布/效应分布比较和基于分布的商3种评价方法对典型石油化工污染土壤中萘的生态风险进行了评价.结果表明,大庆市贴不贴纳污泡周边土壤中萘污染的生态风险较小.采用点估计商方法并应用1000倍的外推因子时,危害商小于1;采用后2种评价方法并应用100倍的评价因子时,生态风险的概率为14.1%,10%的物种受损害的概率为6.2%,基于分布的商值超出1的概率为2.1%.案例研究结果表明,运用点估计商→暴露分布/效应分布比较→基于分布的商的方法流程对石油化工污染场地进行风险评价是可行的.

The 3 kinds of assessment method： point estimated quotients, comparison of exposure and effects distribution and distribution-based quotients （DBQ） were employed to evaluate the ecological risk of naphthalene in the soil of a typical petrochemicals-contaminated site. The ecological risk of naphthalene pollution was relatively small around Tiebutie contaminated site of Daqing City. The harm quotient was smaller than 1 when adopting point estimated quotients method and applying pushing out factor of 1000 times. After adopting the back 2 kinds of assessment methods and applying assessment factor of 100 times, the ecological harm probability was 14.1%, the harm probability of 10% of the species affected was 6.2% and based on the distribution quotient value great over 1 was 2.1%. The case study results showed that employing point estimated quotient→comparison of exposure and effect distribution →distribution-based quotient flow was feasible for risk assessment of petrochemical contaminated site.