In situ measurement of dissolved Fe(ii) in sediment pore water with a novel sensor based on C18-ferrozine concentration and optical imaging detection

2019 ◽  
Vol 11 (2) ◽  
pp. 133-141 ◽  
Author(s):  
Chengrong Guo ◽  
Mingjie Ma ◽  
Dongxing Yuan ◽  
Yongming Huang ◽  
Kunning Lin ◽  
...  
Keyword(s):  
Optical Imaging ◽  
Pore Water ◽  
In Situ Measurement ◽  
Sensor System ◽  
Sediment Pore Water ◽  
Imaging Detection

A novel sensor system, which integrated sampling, enrichment, and in situ measurement of dissolved Fe(ii) in sediment pore water, was developed.

Distributions of Ferrous Iron and Sulfide in an Anoxic Hypolimnion

1984 ◽  
Vol 41 (2) ◽  
pp. 286-293 ◽  
Author(s):  
Robert B. Cook
Keyword(s):  
Pore Water ◽  
Solubility Product ◽  
Iron Sulfide ◽  
Water Flux ◽  
Sediment Pore Water ◽  
Experimental Lakes Area ◽  
Northwestern Ontario ◽  
Anoxic Hypolimnion ◽  
Decomposition Of Organic Matter

In the anoxic hypolimnion of Lake 227, Experimental Lakes Area, northwestern Ontario, ΣH2S exhibits a mid-depth maximum, while Fe2+ increases with depth. At the mid-depth ΣH2S maximum and below, saturation with respect to amorphous FeS is reached, and the concentration of ΣH2S is limited by the high Fe2+ concentrations, in accord with the FeS solubility product. Values for pKsp[Formula: see text] for FeS determined from the ΣH2S maximum and below averaged 3.16 in 1979 and agree well with other in situ and laboratory measurements. In the top 10 cm of sediment, pore water ΣH2S and Fe2+ are in equilibrium with amorphous FeS. Analyses of cores confirms the existence of an iron sulfide phase. Fe2+, which is produced in the pore water from the decomposition of organic matter, increases to concentrations at which siderite may form, although the presence of siderite has not been verified. Comparison of calculated pore water fluxes of Fe2+ with the observed increase of Fe2+ in the anoxic hypolimnion reveals that about 90% of the observed flux originates at the sediment–water interface, while the remainder is derived from pore water flux.

scholarly journals COMPARISON OF TWO SAMPLING METHODS (CORER AND IN SITU SEDIMENT SIPPER METHODS) FOR THE PORE WATER OF SEDIMENT

2018 ◽  
Vol 29 ◽  
pp. 1-11
Author(s):  
Muswerry Muchtar
Keyword(s):  
Pore Water ◽  
Sampling Methods ◽  
Sampling Techniques ◽  
Sediment Depth ◽  
Sediment Pore Water ◽  
Advantages And Disadvantages ◽  
Phosphate Nitrate ◽  
Vertical Variations

Effect of two sampling techniques (i.e. corer and sipper samplers) of sediment pore water on measured concentrations of phosphate, nitrate and ammonia was examined. The concentrations of nitrate and ammonia in relation to sediment depth (vertical variations) collected by corer and sipper sampler do not show significant differences, while for phosphate concentrations significant differences occurred. The advantages   and disadvantages of both techniques are discussed.

A Novel Solid Electrolyte Oxygen Sensor System for In-Situ Measurement and Process Control

2010 ◽  
Author(s):  
Frank Uwe Hammer ◽  
Ernst Messerschmid ◽  
Markus Rogg ◽  
Akira Kobayashi ◽  
Josef Krasa ◽  
...  
Keyword(s):  
Process Control ◽  
Solid Electrolyte ◽  
Oxygen Sensor ◽  
In Situ Measurement ◽  
Sensor System

scholarly journals An In Situ Analyzer for Two-Dimensional Fe(II) Distribution in Sediment Pore Water Based on Ferrozine Coloration and Computer Imaging Densitometry

ACS Omega ◽  
2020 ◽  
Vol 5 (49) ◽  
pp. 31551-31558
Author(s):  
Mingjie Ma ◽  
Honghui Wang ◽  
Jin Xu ◽  
Yongming Huang ◽  
Dongxing Yuan ◽  
...  
Keyword(s):  
Pore Water ◽  
Two Dimensional ◽  
Sediment Pore Water ◽  
Water Based

In Situ Measurement of PCB Pore Water Concentration Profiles in Activated Carbon-Amended Sediment Using Passive Samplers

2011 ◽  
Vol 45 (9) ◽  
pp. 4053-4059 ◽  
Author(s):  
Amy M. P. Oen ◽  
Elisabeth M. L. Janssen ◽  
Gerard Cornelissen ◽  
Gijs D. Breedveld ◽  
Espen Eek ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Pore Water ◽  
Water Concentration ◽  
In Situ Measurement ◽  
Passive Samplers ◽  
Concentration Profiles

A novel device for in situ point measurements of fluorescent tracers in sediment pore water

2021 ◽  
Vol 148 ◽  
pp. 103827
Author(s):  
Anja Höhne ◽  
Karl Mellerowicz ◽  
Oliver Lischtschenko ◽  
Jörg Lewandowski
Keyword(s):  
Pore Water ◽  
Fluorescent Tracers ◽  
Sediment Pore Water ◽  
Novel Device
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