LIU Haofeng¹ , LIU Yuyan² , JI Caiye² , YU Yongxin³ , WANG Lin², WEI Ting³ , FU Bo²

(1.Changjizhou Environmental Monitoring Station, Changji, Xinjiang 831100, China;
2.School of Geography and Environmental Science, Hainan Normal University, Haikou, Hainan 571158, China;
3. Department of Chemistry and Applied Chemistry, Changji University, Changji, Xinjiang 831100, China)

Abstract: We collected organic film samples from impermeable surfaces (window glass) of the downtown Urumqi, and analyzed their contents of Phthalate acid esters(PAEs), including dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), and di-2-ethylhexyl phthalate (DEHP), by a gas chromatography. The pollution characteristics, accumulation, component and spatial distribution, of PAEs in the impermeable layer membrane were investigated. The results showed that PAEs in the impervious surfaces of downtown Urumqi were mainly DEP, followed by DBP, and other PAEs were relatively insignificant. In terms of the spatial distribution, contents of DMP, DEP and DBP were the highest in the Shayibake area, followed by in the new city, and were the lowest in the Shuimogou area; compared to other PAEs, the spatial distribution of DEHP was slightly different, the highest content was found in the new city. In terms of the functional areas, contents of DMP, DEP and DBP showed a trend of all commercial areas > industrial areas > traffic intensive areas > residential culture and education areas > park square areas. The distribution trend of DEHP in functional areas, that is traffic intensive areas > commercial areas > industrial areas > park square areas, was slightly different from those of other PAEs. The contents of ΣPAEs and individual PAEs in the downtown Urumqi were 3-4 orders of magnitude higher than in satellite cities, e.g. the Changji city, suggesting that contents of PAEs in impervious surfaces of large cities may be much higher than those of small and medium-sized cities. This study will contribute to understanding of the enrichment of PAEs and its mechanism in typical media of impermeable surfaces in the arid region. It provides scientific supports for the accurate assessment of PAEs pollution and the formulation of relevant environmental protection policies.

Key words: Impervious surface; Organic membrane; PAEs; Pollution characteristics; Urumqi

EARTH AND ENVIRONMENT Vol.47, No.2, Tot No.328, 2019, Page 194-201