Development of the DET technique for high-resolution determination of soluble reactive phosphate profiles in sediment pore waters
Development of the DET technique for high-resolution determination of soluble reactive phosphate profiles in sediment pore waters
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开发用于高分辨率测定沉积物孔隙水中可溶性活性磷酸盐分布的 DET 技术
DOI：
10.1080/03067310903434733
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发表时间：
2010-10
影响因子：
2.6
通讯作者：
Xu, Di
中科院分区：
文献类型：
--
作者：
Sun, Qin;Ding, Shiming;Xu, Di
发展了一种测量沉积物孔隙沃茨中可溶性活性磷酸盐（SRP）剖面的毫米级分辨率DET（薄膜扩散平衡）技术。分析方法包括平衡沉积物中的凝胶、从沉积物中回收后的凝胶切片、凝胶中磷的反洗脱和洗脱液中SRP的分析。相对于去离子水，用0.25 M硝酸反洗脱提高了磷的回收率。用DET探针测定的不同沉积物孔隙沃茨中SRP浓度与直接比色法测定的结果吻合较好。同时使用凝胶探针和其他技术（包括Rhizon和透析窥视器）获得的孔隙水分布图也显示出相似分辨率的可比性。利用DET探针研究了太湖藻类和水生植物两种优势区沉积物孔隙水的SRP剖面。一个越来越向上运动的SRP观察到在地下孔隙沃茨为主的区域，再加上在3月至5月的水温增加。在以水生植物为主的区域，孔隙沃茨中的SRP呈峰形分布，水平向的不均匀性很大程度上是由沉水植物根系的活动引起的。
The DET (diffusive equilibrium in thin films) technique is developed to measure soluble reactive phosphate (SRP) profiles in sediment pore waters at a millimetre resolution. The analytical procedure includes equilibration of the gels in sediments, section of the gels after retrieval from the sediments, back elution of phosphorus in the gels, and analysis of SRP in the eluents. Recovery of phosphorus is improved from back elution with 0.25 M nitric acid relative to deionised water. SRP concentrations in pore waters of different sediments measured by DET probes agree well with those directly measured by the colorimetric method. Pore water profiles obtained simultaneously using gel probes and other techniques (including Rhizon and dialysis peeper) also show comparability at similar resolutions. The DET probes were used to investigate pore water SRP profiles in the sediments of two contrasting regions (algal-dominated and macrophyte-dominated) in Lake Taihu. An increasingly upward movement of SRP was observed in subsurface pore waters of the algal-dominated region coupled with an increase in water temperature from March to May. Peak-shape distribution of SRP and horizontal heterogeneity was observed in pore waters of the macrophyte-dominated region, which is most likely caused by the activity of submerged macrophyte roots.
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影响因子：
11.4
作者：
Monbet, Phil;McKelvie, Ian D.;Worsfold, Paul. J.
通讯作者：
Worsfold, Paul. J.
DOI：
10.1023/a:1018357021043
发表时间：
1997-10
期刊：
Water, Air, and Soil Pollution
影响因子：
--
作者：
T. Angelidis
通讯作者：
T. Angelidis
影响因子：
6.1
作者：
Docekalová, H;Clarisse, O;Wartel, M
通讯作者：
Wartel, M
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
影响因子：
8.9
作者：
Bai, Xiuling;Ding, Shiming;Zhang, Lu
通讯作者：
Zhang, Lu
影响因子：
2.7
作者：
J. Lewandowski;Christine Laskov;M. Hupfer
通讯作者：
J. Lewandowski;Christine Laskov;M. Hupfer