摘要
于2015年6月采集日照市岚山化工园区和临沂市罗庄华宇电解铝厂周围土壤样品,分析了16种多环芳烃(PAHs)的含量和组成,研究了距化工区不同距离的土壤中PAHs含量和组成的变化、来源及健康风险.结果表明,岚山化工园区周围土壤中PAHs总含量(∑_(16)PAHs)(2764.2—3435.9μg·kg^(-1))略高于华宇电解铝厂周边土壤中∑_(16)PAHs(2729.7—3047.5μg·kg^(-1)),均达到重度污染.两化工厂周边土壤中各环数PAHs所占比例大小顺序均为4环>5环>3环>2环和6环,但各PAHs化合物的组成存在差异.距化工区越远,土壤中∑_(16)PAHs含量越低,但各环数PAHs含量变化不一致.同分异构体比值法结果表明,两化工厂PAHs主要来源是燃煤和石油燃烧.正定矩阵因子分解法表明,岚山化工园区周围土壤PAHs的来源中燃煤源占36%,汽油和柴油燃烧源占21.6%,生物质燃烧源占19.1%,石油源和焦炭燃烧混合源占19.3%.华宇电解铝厂周围土壤PAHs的来源中燃煤源占33.5%,汽油燃烧源占24.8%,柴油燃烧源占31.4%,生物质燃烧源占10.3%.岚山化工园区周围土壤PAHs来源中燃煤源所占比例高于华宇电解铝厂,汽油和柴油燃烧源所占比例低于华宇电解铝厂.岚山化工园区和华宇电解铝厂周边土壤中PAHs的总Ba P_(eq)平均值分别为326.7μg·kg^(-1)和441.1μg·kg^(-1),均低于加拿大土壤质量指导值600μg·kg^(-1).健康风险评估表明,华宇电解铝厂总ILCRs值(3.9×10^(-6)—6.0×10^(-6))高于岚山化工园区(2.9×10^(-6)—4.5×10^(-6)).两化工厂周围土壤总ILCRs值大于1×10^(-6),均存在潜在的致癌风险.
Soil samples were collected form Lanshan chemical plant in Rizhao and Huayu electrolytic aluminum plant in Linyi in June 2015. The concentrations and distribution of 16 polycyclic aromatic hydrocarbons（ PAHs） were analyzed,and the variation of the concentrations and distribution withdistance,sources,and health risk of the 16 PAHs were investigated. The results showed that the concentrations of 16 PAHs（ Σ16 PAHs） in the soil around the Huayu electrolytic aluminum plant（ 2764.2—3435. 9 μg·kg-1） was slightly higher than those in the soil aroud Huayu electrolytic aluminum plant（ 2729.7—3047.5 μg·kg-1）,suggesting that the level of PAHs in the soil reached severe pollution. The order of mass fraction of PAHs with different number of rings in the soil was4-ring〉 5-ring〉 3-ring 〉 2-ring and 6-ring,but the composition of individual PAH compounds was different. Σ16 PAHs decreased with the increase of distance to the chemical plants,but the concentration of each PAH presented a different pattern of variation with distance. The molecular diagnostic ratios analysis suggests that the main sources of PAHs in the soil around the two chemical plants were coal and oil combustion. Positive matrix factorization（ PMF） shows that the sources of PAHs in the soil around Huayu electrolytic aluminum plant were 36% from coal combustion,21.6%from gasoline and diesel combustion,19.1% from biomass combustion,and 19. 3% from petroleum sources and coke combustion. The sources of PAHs in the soil around Huayu electrolytic aluminum plant were 33.5% from coal combustion,24.8% from gasoline combustion,31.4% from combustion of diesel,and 10.3% from combustion of biomass. The proportion of coal combustion for the sources of PAHs in the soil around Lanshan chemical plant was higher than that of Huayu electrolytic aluminum plant. The proportion of gasoline and diesel combustion in soils around Lanshan chemical plant was lower than that of Huayu electrolytic aluminum plant. The toxic equivalency factors of benzo[a]pyr
出处
《环境化学》
CAS
CSCD
北大核心
2018年第2期296-309,共14页
Environmental Chemistry
基金
公益性行业(农业)科研专项经费项目(201503107)
农业部软科学研究项目(D201729)资助~~
