Distribution of organic and inorganic phosphorus compounds in marine and lacustrine sediments: a 31P NMR study
Distribution of organic and inorganic phosphorus compounds in marine and lacustrine sediments: a 31P NMR study
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DOI：
10.1016/s0009-2541(99)00098-4
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发表时间：
2000-02-01
期刊：
影响因子：
3.9
通讯作者：
Damberg, C
中科院分区：
文献类型：
--
作者：
Carman, R;Edlund, G;Damberg, C
溶液P-31核磁共振波谱已被用于表征不同种类的有机和无机磷化合物在一些不同的海洋和湖泊沉积物环境。所有样品都含有正磷酸单酯和二酯，其中前者始终是主要成分。在可能的正磷酸单酯候选物中，肌醇磷酸盐可能是重要的。的正磷酸二酯的量是高得多，在减少沉积物从波罗的海比在那些地区与缺氧/缺氧条件下，表明更有效的分解二酯在好氧环境。同样的情况也观察到在湖泊沉积物剖面。焦磷酸盐和聚磷酸盐被发现在从湖泊的氧化沉积物，而没有这样的化合物的迹象可以看到在波罗的海沉积物样品。氧化还原的变化（湖泊样品）和阳离子强度之间的海水和湖水的变化将最有可能是主要的解释所观察到的分布格局的焦磷酸盐和聚磷酸盐。小而尖锐的峰表明，在波罗的海南部的沉积物中存在磷酸。还观察到其他几个未鉴别的峰，其中一些可归属于芳香族二酯和单酯。(C)2000 Elsevier Science B. V.保留所有权利。
Solution P-31 NMR spectroscopy has been used for the characterization of different classes of organic and inorganic phosphorus compounds in a number of different marine and lacustrine sediment environments. All samples contain orthophosphate mono- and di-esters of which the former is always the major constituent. Of possible orthophosphate mono-ester candidates, inositol phosphates may be of importance. The amount of orthophosphate di-esters is much higher in the reduced sediments from the Baltic Sea than in those areas with anoxic/suboxic conditions, indicating a more efficient decomposition of di-esters in oxic environments. The same situation was also observed in the lake sediment profiles. Pyro- and polyphosphate are found in the oxic sediments from the lakes whereas no sign of such compounds could be seen in the Baltic Sea sediment samples. Redox variations (lake samples) and cation strength variations between the sea water and the lacustrine water will most likely be the main explanation for the observed distribution patterns of pyro- and polyphosphate. Small but sharp peaks indicate the occurrence of phosphoric acids in a sediment from the southern Baltic Sea. Several other unidentified peaks were also observed, some of which could be assigned to aromatic di- and mono-esters. (C) 2000 Elsevier Science B.V. All rights reserved.