Huan jing ke xue= Huanjing kexue | 2019
[Pollution Levels, Sources, and Spatial Distribution of Phthalate Esters in Soils of the West Lake Scenic Area].
Abstract
To investigate pollution from phthalate esters (PAEs) in the soils of the West Lake Scenic Area, Hangzhou, Zhejiang province, a total of 42 samples were collected from 4 species of soil with different uses. The concentrations and composition of 6 PAEs were analyzed by gas chromatography triple quadrupole mass spectrometry (GC-MS/MS). The sources and spatial distribution of PAEs in the different soil species were analyzed using Principal Component Analysis (PCA) and Ordinary Kriging (OK) methods. It was found that the total concentrations of the 6 PAEs (ΣPAEs) ranged from 597.6 μg·kg-1 to 7360.1 μg·kg-1, of which Dimethyl Phthalate (DMP), Di-n-buthyl Phthalate (DBP), and Di-(2-ethylhexyl) Phthalate (DEHP) were most abundant (98.43% of ΣPAEs). As major pollutant, DEHP contributed as much as 66.28% to ΣPAEs. The composition of PAEs in different soil species differed due to source differences; transportation and tourist activities were the main sources of these PAEs. The 6 PAEs were mainly distributed in the northwestern portion of the West Lake Scenic Area, decreasing from north to south and from east to west.