AI Article Synopsis
- A study analyzed four phenolic compounds in surface water and emission sources in a city near Taihu Lake, finding concentrations ranging from 0.15 to 2.75 μg/L in water and 0.43 to 377 μg/L in emissions.
- Seasonal peaks in contamination were noted, especially in August during the rainy season, with severe pollution identified particularly in the northeast area of the study.
- The research identified combined-sewer overflow and agricultural runoff as key seasonal sources, while indirect industrial wastewater discharge was implicated as a continuous source of significant contamination throughout the sampling period.
Article Abstract
A comprehensive characterisation of four phenolic compounds in surface water and various emission sources was conducted simultaneously in a typical industrial city upstream of the Taihu Lake watershed. The overall concentrations of the target compounds ranged from 0.15 to 2.75 μg/L in the surface water and from 0.43 to 377 μg/L in the emission sources. Relatively high concentration levels were observed in August, during which the rainy season typically occurred in the study area, indicating seasonal emission sources. The spatial distribution revealed severe phenolic-compound contamination in the northeast part of the study area. According to the relationships between the surface water and emission sources, combined-sewer overflow and surface runoff from agricultural activities were identified as seasonal emission sources that were responsible for the increased concentration levels in wet seasons. Indirect discharge of industrial wastewater was proposed as a persistent emission source responsible for the severe contamination level in the northeast region over the entire sampling period, accounting for 16.5% of the phenolic-compound load in a demonstration river section. The findings of this study are useful for identifying the sources of phenolic compounds and controlling the contamination from the main sources in a typical industrial city.
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| http://dx.doi.org/10.1016/j.scitotenv.2020.137946 | DOI Listing |
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