Composition characterization and biotransformation of dissolved, particulate and algae organic phosphorus in eutrophic lakes
Composition characterization and biotransformation of dissolved, particulate and algae organic phosphorus in eutrophic lakes
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富营养化湖泊中溶解有机磷、颗粒有机磷和藻类有机磷的组成特征及生物转化
DOI：
10.1016/j.envpol.2020.114838
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发表时间：
2020-10-01
影响因子：
8.9
通讯作者：
Giesy, John P.
中科院分区：
文献类型：
--
作者：
Feng, Weiying;Yang, Fang;Giesy, John P.
水体中有机磷的特征及其转化对磷的生态地球化学循环和浮游植物、蓝藻水华的发生具有重要意义。采用P-31溶液核磁共振（NMR）技术，结合野外调查和室内分析，研究了我国两个富营养化湖泊太湖和巢湖藻类中溶解态磷（DP）、颗粒态磷（PP）和有机态磷的组成和结构特征。并探讨了影响这些组分在湖泊生态系统中迁移转化的因素。建立了一种从湖水中提取、絮凝和浓缩DP和PP的方法。结果表明，正磷酸（Ortho-P）分别占DP的32.4%~ 81.3%，占PP的43.7%~ 54.9%，单酯磷（Mono-P）分别占DP的13.2%~ 54.0%，占PP的32.9%~ 43.7%。藻类中的磷主要以有机磷为主，尤其是单磷，占TP的50%以上。温度（T）、电导率（EC）、pH值、水深（SD）、溶解氧（DO）、化学需氧量（CODcr）、叶绿素a（Chl-a）等环境因子和水质参数对两个湖泊中各种P组分的绝对和相对浓度均有影响。温度升高促进了生物有效磷（邻位磷和单磷）向湖泊沃茨的释放。研究结果可为湖泊水环境中有机磷组分在各介质间的相互转化过程提供重要的理论依据。(C)2020由Elsevier Ltd.出版
Characteristics and transformation of organic phosphorus in water are vital to biogeochemical cycling of phosphorus and support of blooms of phytoplankton and cyanobacteria. Using solution P-31 nuclear magnetic resonance (NMR), combined with field surveys and lab analyses, composition and structural characteristics of dissolved phosphorus (DP), particulate phosphorus (PP) and organic P in algae were studied in two eutrophic lakes in China, Tai Lake and Chao Lake. Factors influencing migration and transformation of these constituents in lake ecosystems were also investigated. A method was developed to extract, flocculate and concentrate DP and PP from lake water samples. Results showed that orthophosphate (Ortho-P) constituted 32.4%-81.3% of DP and 43.7%-54.9% of PP, respectively; while monoester phosphorus (Mono-P) was 13.2%-54.0% of DP and 32.9%-43.7% of PP, respectively. Phosphorus in algae was mostly organic P, especially Mono-P, which was >= 50% of TP. Environmental factors and water quality parameters such as temperature (T), electrical conductivity (EC), pH, secchi depth (SD), dissolved oxygen (DO), chemical oxygen demand (CODcr), chlorophyll-a (Chl-a), affected the absolute and relative concentrations of various P components in the two lakes. Increased temperature promoted bioavailable P (Ortho-P and Mono-P) release to the lake waters. The results can provide an important theoretical basis for the mutual conversion process of organic P components between various media in the lake water environment. (C) 2020 Published by Elsevier Ltd.