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Concentrations of black carbon (BC) were determined in the sediments from the main stream and the tributary of the Changjiang River with CTO-375 method. Meanwhile, the total organic carbon (TOC) contents, grain size of sediments were also measured. BC contents ranged from 0.22 to 1.89 mg/g, which was found to be insignificant with human activities and sediment composition. Significant relation between BC and TOC indicated that they were from similar sources, e.g. soil erosions and hunman activities.

Distribution of Black Carbon in The Sediments From The Changjiang River