Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Spatial Distribution and Environmental Significance of Phosphorus Fractions in River Sediments and Its Influencing Factor from Hongze and Tiaoxi Watersheds, Eastern China

Version 1 : Received: 22 June 2020 / Approved: 24 June 2020 / Online: 24 June 2020 (08:54:31 CEST)

How to cite: Marip, J.B.; Yuan, X.; Zhu, H.; Nooni, I.K.; Amankwah, S.O.; Prempeh, N.A.; Norgbey, E.; Yuguda, T.K.; Khaing, Z.M. Spatial Distribution and Environmental Significance of Phosphorus Fractions in River Sediments and Its Influencing Factor from Hongze and Tiaoxi Watersheds, Eastern China. Preprints 2020, 2020060288 (doi: 10.20944/preprints202006.0288.v1). Marip, J.B.; Yuan, X.; Zhu, H.; Nooni, I.K.; Amankwah, S.O.; Prempeh, N.A.; Norgbey, E.; Yuguda, T.K.; Khaing, Z.M. Spatial Distribution and Environmental Significance of Phosphorus Fractions in River Sediments and Its Influencing Factor from Hongze and Tiaoxi Watersheds, Eastern China. Preprints 2020, 2020060288 (doi: 10.20944/preprints202006.0288.v1).

Abstract

River sediment from two inflow watersheds (Hongze and Tiaoxi) to Hongze and Taihu Lake in Eastern China was analyzed by the sequential extraction procedure. This study aimed to explore a spatial distribution of phosphorus fractions in river sediments and analysed the relationship between different phosphorus fractions and their environmental influence on the sediments within different watersheds in Eastern China. Five fractions of sedimentary phosphorus, including freely sorbed phosphorus, were all analyzed (NH4Cl-P), redox-sensitive phosphorus (BD-P), bound phosphorus metal oxide (NaOH-P), bound phosphorus calcium (HCl-P) and residual phosphorus (Res-P). The order of rank of the P fractions for the river Anhe was HCl-P>NaOH-P>BD-P>NH4Cl-P; whereas that of the Suihe river was HCl-P>BD-P>NaOH-P>NH4Cl-P. For the rank order of the Hongze watershed, HCl-P was higher while the NH4Cl-P contents were significantly lower. The rank order for the Dongtiaoxi river was NaOH-P > HCl-P> BD-P> NH4Cl-P and that of Xitiaoxi river was NaOH-P> BD-P> HCl-P> NH4Cl-P. Compared with phosphorus forms of Tiaoxi watershed, NaOH-P contents were significantly higher in the converse of HCl-P contents were significantly higher in Hongze watershed while both in NH4Cl-P contents were significantly lower. Variations may be attributed to differential discharge of P watershed form due to land-use changes and urban river ambient conditions.

Subject Areas

Phosphorus fractions; Phosphorus; Sediment; Tiaoxi; Hongze; Watershed

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