Mobilization of Fractionated Phosphorus in River Sediment

• Main Authors: Zhe-Cheng She, 葉哲呈
• Other Authors: Li-Chu Tsai
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/27528804751557910630

碩士 === 嘉南藥理科技大學 === 環境工程與科學系 === 101 === The monitoring of total phosphorus (TP) and orthophosphate (PO43-) concentration is not enough to assess the eutrophication tendency of water quality in lakes, reservoirs, streams, and coastal area. The fractionation of phosphorus speciation on solid sediment particles was used to predict the release of phosphorus speciation into aqueous solution by environmental parameters. To predict the increase of carcinogenic haloform concentration in tap water, the TP and PO43- concentration was monitored in reservoirs per season or year in Taiwan. The TP concentration and distribution of fractionated phosphorus (P) on sediment of lakes, reservoirs, streams, and coastal area did not investigate yet in Taiwan. The phosphorus fractionations in sediments was separated with chemical sequential extraction scheme (SEDEX) into exchangeable or loosely sorbed P (F1), Fe-bound P (F2), authigenic apatite plus CaCO3-bound P plus biogenic apatite (F3), detrital apatite plus other inorganic P (F4) and organic P (F5). The percentages of authigenic apatite plus CaCO3-bound P plus biogenic apatite fraction (F3) were 76, 61, and 40% among total phosphorus of Ell-ren, Yan-shuei¸ and San Yen korn river sediments. The Pearson correlation coefficient analysis was used to find the correlation coefficient among factors which affect the release of phosphorus speciation. Phosphorus bound to F3 and F5 have positive significant changes with organic matters, iron oxides and manganese oxides contents at Ell-ren Yan-shuei¸ and San Yen korn river sediment with correlation coefficient r above 0.56. The factor analysis with principal components methods was applied to reduce the parameters into two major factors which could be used to explain 65%、67%and 57% of the migration of phosphorus speciation among sediment fractions and solid-liquid interface.