TITLE

Vertical variation of phosphorus forms in surface sediments from Wuli Bay, Taihu Lake, China

AUTHOR(S)
Li Jun; Liu Congqiang; Wang Shilu; Zhu Zhaozhou; Zhou Zhihua; Xiao Huayun
PUB. DATE
September 2006
SOURCE
Chinese Journal of Geochemistry;2006, Vol. 25 Issue 3, p279
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In order to investigate the cycling of phosphorous in the Taihu Lake, a sequential extraction technique was used to separate different phosphorus forms in surficial sediments from the Wuli Bay of the Taihu Lake. The concentrations of total P are high in the sediments, with an average of 2.80 mg · g-1, and a variation range between 4.02 and 2.05 mg · g-1. Total P is composed mainly of inorganic P (70%-90%), a large portion (75%-85%) of which lies in the CDB-extractable iron oxide phase. The low Fe/P atomic ratios (2.0-5.3) indicate that the Fe compounds extracted with CDB have a lower proportion of relatively crystalline phases in all samples, and that the absorption between iron and phosphorus has probably reached certain equilibrium. Organic C/N atomic ratios (8.8 - 10.6) for most of the samples are lower, which suggests a lacustrine authigenic source of organic matter in the sediments. Moreover, organic C/P atomic ratios (135 - 320) are usually higher than the Redfield ratio (106 : 1), showing that the organic phosphorous had been preferentially released via organic matter degradation during the early diagenesis process.
ACCESSION #
23131361

 

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics