Dioxin-like Polychlorinated Biphenyls Contamination and Distribution in Soils from the Modern Yellow River Delta,China |
| |
| Authors: | J Liu Z J Cui H Y Xu F X Tan |
| |
| Institution: | 1. School of Environmental Science and Engineering , Shandong University , Jinan, China;2. School of City Planning and Environmental Engineering , Shandong Construction University , Jinan, China;3. School of Environmental Science and Engineering , Shandong University , Jinan, China;4. School of City Planning and Environmental Engineering , Shandong Construction University , Jinan, China |
| |
| Abstract: | The concentrations of 12 dioxin-like Polychlorinated Biphenyls (dl-PCBs) were determined from 37 soil samples collected from the modern Yellow River Delta (China) in March 2006. The PCB concentrations were determined by dual capillary GC-ECD. The total dl-PCBs concentrations were in the range of 108.7 to 2153 ng/kg with an average of 800.5 ng/kg. The toxic equivalency (TEQ) in this area varies from 2.3 × 10? 5 to 9.5 × 10? 5 ng-TEQ/kg, so the delta is slightly polluted by PCBs. PCB118, the main congener, accounted for 46.7% of the total dl-PCB. More than 60% dl-PCBs were penta-PCBs. The spatial distribution of the dl-PCBs is discussed in detail. The distribution of the PCBs suggests that water runoff is the main source of the total contaminant burden in the delta, and that atmospheric precipitation plays an important role. |
| |
| Keywords: | Dioxin-like polychlorinated biphenyls (dl-PCBs) modern Yellow River Delta soil concentration distribution trends |
|
|
