Pollution characteristics and source analysis of short-chained chlorinated paraffins in Lanzhou section of upper Yellow River
This study investigated the pollution characteristics,sources and ecological risks of SCCPs in the water environment of Lanzhou section of the upper reaches of the Yellow River in 2023 during dry season and wet season.The concentrations of SCCPs in water phase,suspended particle phase and sediment in the study area were 116.04～1057.74ng/L,1.89～68.93μg/g(dry weight)and 121.65～428.97ng/g(dry weight),respectively.The concentration of SCCPs in the water phase was higher during the wet period than during the dry period,but the concentration of SCCPs in the suspended particle phase was higher during the dry period;the concentration of SCCPs in the sediment was higher in the lower part of the main sewage outlet and the slower part of the river.The sewage discharge in the study area may have increased during the wet period.As to the homologue patterns of SCCPs,C10,C11 and Cl5-7 components occupy the highest proportion.The SCCPs pollution in the study area may be mainly caused by the production and use of CPs products and atmospheric transport,whose pollution contribution rates were 67.21％and 32.79％,respectively.According to the risk assessment criteria of Environment Canada,SCCPs pollution in river water and sediment in the study area did not pose a significant ecological risk,but the high concentration of SCCPs in the suspended particulate phase needs to be paid due attention.
万方数据
维普
