High-Resolution, Two-Dimensional Measurement of Dissolved Reactive Phosphorus in Sediments Using the Diffusive Gradients in Thin Films Technique in Combination with a Routine Procedure

2011 ◽  
Vol 45 (22) ◽  
pp. 9680-9686 ◽  
Author(s):  
Shiming Ding ◽  
Fei Jia ◽  
Di Xu ◽  
Qin Sun ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
High Resolution ◽  
Two Dimensional ◽  
Routine Procedure ◽  
Dimensional Measurement ◽  
Dissolved Reactive Phosphorus ◽  
Reactive Phosphorus ◽  
Diffusive Gradients

scholarly journals High-resolution two-dimensional quantitative analysis of phosphorus, vanadium and arsenic, and qualitative analysis of sulfide, in a freshwater sediment

2008 ◽  
Vol 5 (2) ◽  
pp. 143 ◽  
Author(s):  
Anthony Stockdale ◽  
William Davison ◽  
Hao Zhang
Keyword(s):  
Thin Films ◽  
High Resolution ◽  
Preparation Method ◽  
Two Dimensional ◽  
Binding Phase ◽  
Bacterial Uptake ◽  
Geochemical Behaviour ◽  
Multiple Analytes ◽  
Removal Processes ◽  
Diffusive Gradients

Environmental context. Chemical characterisation of sediment microniches can reveal diagenetic processes that may not be detected by larger-scale analysis. With the development of a new preparation method for a binding phase gel, the technique of diffusive gradients in thin films has been used to demonstrate links between the diagenesis of sulfide, phosphorus, vanadium and arsenic at microniches. Knowledge of these processes may improve predictions of past deposition climates where trace elements are considered as paleoredox proxies. Abstract. Recently introduced techniques that can provide two-dimensional images of solution concentrations in sediments for multiple analytes have revealed discrete sites of geochemical behaviour different from the average for that depth (microniches). We have developed a new preparation method for a binding phase, incorporated in a hydrogel, for the diffusive gradients in thin films (DGT) technique. It allows co-analysis of sulfide and the reactive forms of phosphorus, vanadium and arsenic in the porewaters at the surface of the device. This gel, when dried and analysed using laser ablation mass spectrometry, allows the acquisition of high-resolution sub-millimetre-scale data. The binding phase was deployed within a DGT device in a sediment core collected from a productive lake, Esthwaite Water (UK). Localised removal of phosphate and vanadium from the porewaters has been demonstrated at a microniche of local sulfide production. The possible removal processes, including bacterial uptake and reduction of vanadate to insoluble VIII by sulfide, are discussed. Understanding processes occurring at this scale may allow improved prediction of pollutant fate and better prediction of past climates where trace metals are used as paleoredox proxies.

scholarly journals High-Resolution Profiles of Dissolved Reactive Phosphorus in the Porewaters of Lake Sediments Assessed by DGT Technique

2014 ◽  
Vol 05 (08) ◽  
pp. 694-702
Author(s):  
Jian Wang ◽  
Jingtian Zhang ◽  
Qiong Xie ◽  
Fengyu Zan ◽  
Shengpeng Zuo ◽  
...  
Keyword(s):  
High Resolution ◽  
Lake Sediments ◽  
Dissolved Reactive Phosphorus ◽  
Reactive Phosphorus

A novel Mg(OH)2 binding layer-based DGT technique for measuring phosphorus in water and sediment

2020 ◽  
Vol 22 (2) ◽  
pp. 340-349
Author(s):  
Fazhi Xie ◽  
Lu Li ◽  
Xiaoyan Sun ◽  
Tingting Hu ◽  
Kang Song ◽  
...  
Keyword(s):  
Thin Films ◽  
Natural Water ◽  
Phosphorus Species ◽  
Water And Sediment ◽  
Reactive Phosphorus ◽  
Diffusive Gradients

Diffusive gradients in thin films (DGT) have gained wide attention for in situ measurement of reactive phosphorus species (PO4) in natural water, sediments and potentially soils.

scholarly journals An in-depth assessment into simultaneous monitoring of dissolved reactive phosphorus (DRP) and low-molecular-weight organic phosphorus (LMWOP) in aquatic environments using diffusive gradients in thin films (DGT)

2015 ◽  
Vol 17 (4) ◽  
pp. 711-727 ◽  
Author(s):  
Christian Wilhelm Mohr ◽  
Rolf David Vogt ◽  
Oddvar Røyset ◽  
Tom Andersen ◽  
Neha Amit Parekh
Keyword(s):  
Molecular Weight ◽  
Organic Phosphorus ◽  
Aquatic Environments ◽  
Low Molecular Weight ◽  
P Fractionation ◽  
Physiochemical Properties ◽  
Dissolved Reactive Phosphorus ◽  
Reactive Phosphorus ◽  
Diffusive Gradients

In situP fractionation size distribution is altered during uptake by the DGT due to the size and physiochemical properties of the molecular species.

High-resolution profiles of dissolved reactive phosphorus in overlying water and porewater of Lake Taihu, China

2014 ◽  
Vol 21 (22) ◽  
pp. 12989-12999 ◽  
Author(s):  
Shouliang Huo ◽  
Jingtian Zhang ◽  
Kevin M. Yeager ◽  
Beidou Xi ◽  
Jian Wang ◽  
...  
Keyword(s):  
High Resolution ◽  
Lake Taihu ◽  
Overlying Water ◽  
Dissolved Reactive Phosphorus ◽  
Reactive Phosphorus

Zr oxide-based coloration technique for two-dimensional imaging of labile Cr(VI) using diffusive gradients in thin films

2016 ◽  
Vol 566-567 ◽  
pp. 1632-1639 ◽  
Author(s):  
Yu Yao ◽  
Chao Wang ◽  
Peifang Wang ◽  
Lingzhan Miao ◽  
Jun Hou ◽  
...  
Keyword(s):  
Thin Films ◽  
Two Dimensional ◽  
Diffusive Gradients
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