Hydroxylated polycyclic aromatic hydrocarbons in surface soil in an emerging urban conurbation in South China
| Autor: | Ying Guo, Hui-Min Shen, Lin-Lin Xia, Chong-Jing Gao, Chen-Chou Wu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
South china Pearl river delta 010504 meteorology & atmospheric sciences Soil test Microorganism Water source Soil classification 010501 environmental sciences Contamination Phenanthrene 01 natural sciences Pollution chemistry.chemical_compound chemistry Environmental chemistry Environmental Chemistry Environmental science Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | The Science of the total environment. 692 |
| ISSN: | 1879-1026 |
| Popis: | To investigate the effects of human activity on contaminants in regional soil, hydroxylated polycyclic aromatic hydrocarbons (OH-PAHs) were measured in 187 surface soil samples of different land-use types collected from the Pearl River Delta (PRD), South China. The concentrations of Σ9OH-PAH (sum of nine target analytes) ranged from 0.36 to 252ng/g (median: 5.98ng/g), with phenanthrene derivatives as the dominant components, accounting for ~70%. Among different land-use types, residency soil contained the highest levels of Σ9OH-PAH (median: 11.3ng/g), followed by landfill soil (9.28ng/g), industry soil (7.51ng/g), agriculture soil (6.04ng/g), forestry soil (4.28ng/g) and drinking water source soil (4.20ng/g). A higher value was also observed in soil from the central PRD (6.94ng/g) than the surrounding areas (5.94ng/g), which indicated a significant impact of human activity on OH-PAH contamination in soil. Correlation and principal component analysis indicated that OH-PAHs in PRD soil are likely derived from the degradation of their parent PAHs in the atmosphere and/or soil and not directly from the same source as the parent PAHs. The ratios of OH-PAHs to their parent PAHs also varied among different land-use types, which may be partly attributed to the different populations of microorganisms in different soil types or the different chemical properties of PAHs and their metabolites. |
| Databáze: | OpenAIRE |
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