天津表层土壤PAHs分子标志物参数的空间特征

以天津地区为例,在选取分子标志物的基础上,应用地统计学方法探讨了多种多环芳烃(PAHs)分子标志物的空间特征,并在此基础上探讨污染源空间分布状况.结果表明,分子标志物的计算和空间分布的模拟,可以帮助识别复杂情况下污染来源的分布情况.通过对天津地区表层土壤PAHs 6种分子标志物参数空间分布的研究,发现天津地区主要的PAHs污染源是煤燃烧源,在天津绝大部分地区都有分布.而石油源和交通污染源主要分布在中部和滨海地区,2 种污染源有一定的重叠.在远郊县的边界地区,有一定的木柴污染源分布.

Spatial characteristics of PAHs molecular marker indices in surface soil of Tianjin

Based on the selected molecular marker indices (MMI) with Tianjin area as example, the spatial characteristics of various polycyclic aromatic hydrocarbons MMI was inquired into using the method of geostatistics and the spatial distribution state of pollution sources was inquired into on this basis. The calculation of MMI and simulation of spatial distributions of MMI could help to identify the distribution state of pollution sources in a complex situation. Studies on the spatial distribution of MMI in topsoil of Tianjin indicated that, the major pollution source for PAHs is coal burning. It distributed in most areas of the region. Petroleum and transportation sources are distributed mainly in the middle and coastal areas, and showed somewhat overlap. In some boundary areas of far north and west, firewood burning played a key role as PAHs pollution source.