Organic phosphorus species in surface sediments of a large, shallow, eutrophic lake, Lake Taihu, China
Organic phosphorus species in surface sediments of a large, shallow, eutrophic lake, Lake Taihu, China
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中国太湖大型浅水富营养化湖泊表层沉积物中的有机磷形态
DOI：
10.1016/j.envpol.2009.03.018
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发表时间：
2009-08-01
影响因子：
8.9
通讯作者：
Zhang, Lu
中科院分区：
文献类型：
--
作者：
Bai, Xiuling;Ding, Shiming;Zhang, Lu
采用0.1 M EDTA和2% (w/v) Na2S2O4溶液对太湖表层沉积物进行预处理，用0.1 M NaOH提取表层沉积物中的有机磷组分。然后用P-31核磁共振谱（P-31 NMR）表征了有机P的组成。在NaOH提取物中检测到磷酸盐、正磷酸盐、正磷酸盐单酯、磷脂、DNA、焦磷酸盐和多磷酸盐等多种P物质。沉积物中提取有机磷占总磷的比例与水柱中总磷的比例呈负相关，正磷酸盐单酯的比例也呈负相关；和DNA。这意味着表层沉积物中的大部分有机磷可能以某种方式稳定，并且不直接参与沉积物的内部P负荷。(c) 2009 Elsevier Ltd.版权所有。
Organic phosphorus (P) fractions in surface sediments from a large shallow, eutrophic Lake Taihu, China, were extracted with 0.1 M NaOH after pre-treatment of the sediments with a solution composed of 0.1 M EDTA and 2% (w/v) Na2S2O4. Composition of organic P in the extracts was then characterized by P-31 nuclear magnetic resonance spectroscopy (P-31 NMR). Several P species, including phosphonates, orthophosphate, orthophosphate monoesters, phospholipids, DNA, pyrophosphate and polyphosphate, were detected in the NaOH extracts. The proportion of extracted organic P to total P in sediments was negatively correlated with total P in the water column, as were the proportions for orthophosphate monoesters; and DNA. This implies that the majority of organic P in surface sediments is likely stabilized in some way, and does not directly contribute to the internal loading of P from sediments. (c) 2009 Elsevier Ltd. All rights reserved.