期刊
ENVIRONMENTAL MONITORING AND ASSESSMENT
卷 191, 期 5, 页码 -出版社
SPRINGER
DOI: 10.1007/s10661-019-7441-0
关键词
Spatial distribution; Source identification; OCPs; PAHs; Chemical industry
资金
- Science and Technology Industrialization Project of Shaanxi Education Department [15JF021]
- Project of Science and Technology Benefit Plan [2012GS610203]
- Program for Innovative Research Team in Shaanxi [2013KCT-13]
- Program of Yulin University High-Level Talent Research Start-Up Fund
The Yulin Energy and Chemical Industry Base is widely known for its rich mineral resources and multiple types of fossil-fuel-based chemical industries; nevertheless, information regarding the level of toxic contaminants in the surface waters is lacking in this area. Therefore, this study investigates the distributions, sources, and risks of various toxic contaminants, including heavy metals, organochlorine pesticides (OCPs), and polycyclic aromatic hydrocarbons (PAHs), from 35 sampling sites in eight rivers. The sigma HCH concentration ranged from 1.28 to 6.64ng/L with predominant -HCH, and the sigma DDT concentration was less than 0.35ng/L. The OCPs were derived from the recent input of lindane, residual technical-grade HCHs, and DDTs. The soil type can affect the environmental fate of DDT, and p,p-DDE was widespread in the sandy land and loess areas. p,p-DDD was rarely detected in the Mu Us Sandy Land area. The calculated ratios of isomers indicated that petroleum was the major source of PAHs. OCP and PAH contamination in the surface waters posed potential risks at several sampling sites. Due to the impacts by industrial emissions, agricultural sources, and vehicular traffic, the distribution of contaminant concentrations in the surface waters exhibited a significant spatial relationship with the land use pattern in the study region according to the results of principal component analysis and cluster analysis.
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