摘要
2006年12月和2007年7月两次采集中原油田周边土壤样品,测定了16种优先监控的PAHs的污染状况。从区域分布上看,土壤样品中PAHs的含量随着与油泥堆积地距离的增大急剧降低。从季节上看,7月份采集的土壤样品中PAHs的含量显著低于12月份采集的土壤样品中PAHs的含量。两次采集的土壤样品中PAHs的组分特征和荧蒽/芘的比值的分析结果表明,在靠近油泥堆积地的土壤中,PAHs主要来源于石油源,且随着与油泥堆积地距离的增大,石油源的作用逐渐减少,燃烧源的作用逐渐增大,到达一定距离后,燃烧源和石油源共同作用一起成为土壤中PAHs的主要来源。内梅罗综合指数分析评价结果表明,7月份土壤受到PAHs的污染明显轻于12月份。但是,总体而言中原油田周边土壤属于较高生态风险区。
The concentrations of sixteen individual polycyclic aromatic hydrocarbons （PAHs） in soils around Zhongyuan Oil Field on December 4 and December 8,2006 and July 24 and July 28,2007 were investigated. The resuhs showed that the concentrations of PAHs in samples decreased greatly with the increase of the distance fi＇om the oil sludge. The concentrations of PAHs in samples on July 24 and July 28,2007 were much less than those on December 4 and December 8,2006. According to the component characteristics of PAHs in soil samples and Fla/Pyr ratios, petrogenie sources were the major source of PAHs in soil samples next to the oil sludge. The contribution of petrogenic sources was less and less with the increase of the distance from the oil sludge, but the contribution of pyrogenie sources became more and more. Both petrogenic sources and pyrogenie sources were the major source of PAHs in soil after the distance increased to the certain boundary. By nemero index,the pollution level of soils on July 24 and July 28,2007 was much less than that on December 4 and December 8,2006. However, soils around Zhongyuan Oil Field are of higher ecological risk in general.
出处
《世界科技研究与发展》
CSCD
2008年第4期422-425,共4页
World Sci-Tech R&D
基金
山东省自然科学基金资助(Y2007E03)
