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Characteristics and Distribution of Organic Phosphorus Fractions in the Surface Sediments of the Inflow Rivers around Hongze Lake, China

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  • Jie Wan

    (Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, College of the Environment, Hohai University, Nanjing 210098, China
    College of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu 241000, China)

  • Xuyin Yuan

    (Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, College of the Environment, Hohai University, Nanjing 210098, China)

  • Lei Han

    (Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, College of the Environment, Hohai University, Nanjing 210098, China)

  • Hongmeng Ye

    (Fujian Key Laboratory of Eco-Industrial Green Technology, Wuyishan University, Wuyishan 354300, China)

  • Xiaofan Yang

    (College of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu 241000, China)

Abstract

In this study, the characteristics and distribution of the organic phosphorus (Po) fractions in the surface sediments of seven inflow rivers around Hongze Lake in China were analyzed with a soil Po fraction method, as used by Ivanoff. The relationships between the Po fractions and physiochemical features of sediments were also discussed. The results showed that, the sediments of the rivers had been moderately pollution with certain ecological risk effects except the Waste Yellow River. The relative contribution order of the Po fractions in the sediments was residual Po > HCl-Po > fulvic acid-Po > humic acid-Po > labile organic phosphorus (LOP). Moderately labile organic phosphorus (MLOP) was the main part of the Po forms in the whole sediments. The risk of phosphorus released from river sediments was the highest in the western region, followed by the southwestern region, and finally the northwestern region. There were significant correlations between Po forms and total phosphorus (TP), inorganic phosphorus (Pi), and Po. Non labile organic phosphorus (NLOP) had the strongest correlation with TP. The distribution of Po forms in each region was different due to the impact of human activities, industrial and agricultural production and the land types; the heaver polluted sediments with higher Po fractions. It is suggested that most of the sediments of the inflow rivers in the regions have certain ecological risk effects and P of them have an important contributions on the eutrophication of Hongze Lake. Po forms can provide a reliable theoretical basis for dealing with the change of water quality and should be paid more attention in the lake eutrophication investigation. There was reciprocal transformation between different Po forms, especially non-bioavailable fraction can change into bio-available ones. The results can provide a basis for the earth cycle of phosphorus and a new perspective of eutrophication control of shallow lakes.

Suggested Citation

  • Jie Wan & Xuyin Yuan & Lei Han & Hongmeng Ye & Xiaofan Yang, 2020. "Characteristics and Distribution of Organic Phosphorus Fractions in the Surface Sediments of the Inflow Rivers around Hongze Lake, China," IJERPH, MDPI, vol. 17(2), pages 1-16, January.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:2:p:648-:d:310651
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    References listed on IDEAS

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    1. Manuel Delgado-Baquerizo & Fernando T. Maestre & Antonio Gallardo & Matthew A. Bowker & Matthew D. Wallenstein & Jose Luis Quero & Victoria Ochoa & Beatriz Gozalo & Miguel García-Gómez & Santiago Soli, 2013. "Decoupling of soil nutrient cycles as a function of aridity in global drylands," Nature, Nature, vol. 502(7473), pages 672-676, October.
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    Cited by:

    1. Soon-Jin Hwang, 2020. "Eutrophication and the Ecological Health Risk," IJERPH, MDPI, vol. 17(17), pages 1-6, August.

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