Composition and Distribution of MiddleMolecular Weight Normal Alkane Compounds in Sediments from Some Rivers in Tianjin, Northern China
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2007-08-10
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Key words:
- Tianjin /
- river /
- sediment /
- normal alkane /
- distributional characteristies /
- origin
Abstract: The composition and distribution of normal alkane compound in sediments from some rivers with different environmental condition in Tianjin city, northern China, have been investigated. The composition and distribution of middlemolecular weight normal alkane in sediments in different rivers was emphasized in this paper. The origins of middlemolecular weight normal alkane in sediments have been analyzed based on the comparison of normal paraffin hydrocarbon composition among sediment, topsoil, dust fall and TSP. The result shows that the relative content of nC17 or nC19 has obvious predominance compared with other normal paraffin hydrocarbon compound in sediments from different rivers and dust fall. The stable carbon isotope value of nC17 is lower, which is different from the value of normal alkane in fossil fuel (such as oil and coal). The composition predominance of nC17 in topsoil and TSP is not occurrence. It is suggested that the nC17 or nC19 in these samples are derived from aquatic organism, such as algae, in water and surface sediments.
Citation: | ZHANG Zhihuan. Composition and Distribution of MiddleMolecular Weight Normal Alkane Compounds in Sediments from Some Rivers in Tianjin, Northern China[J]. Acta Sedimentologica Sinica, 2007, 25(4): 632-639. |