Practical improvements for redox potential (EH) measurements and the application of a multiple-electrode redox probe (MERP) for characterising sediment in situ

Teasdale, Peter R.; Minett, Andrew I.; Dixon, Kaye; Lewis, Trevor; Batley, Graeme E.

doi:10.1016/s0003-2670(98)00171-8

Cited by 39 publications

(31 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Deoxygenation of water was performed by bubbling high purity nitrogen through the solution for greater than 12 h. pH and redox measurements were made using a pH/mV/temp meter (TPS LC-80A), equipped with pH (Orion Sure-flow, 8165BN) or redox (Activon, AEP511) combination probes according to the procedures described by Hutchins et al (2007). The redox electrodes were calibrated according to the method described by Teasdale et al (1998). Moisture content, organic carbon (TOC), and particle size analysis (Mastersizer 2000, Malvern Instruments) were determined as previously described (Hutchins et al, 2007).…”

Section: General Methods and Reagentsmentioning

confidence: 99%

The Effect of Sediment Type and pH-Adjustment on the Porewater Chemistry of Copper- and Zinc-Spiked Sediments

Hutchins

Teasdale

Lee

et al. 2008

Soil and Sediment Contamination: An International Journal

View full text Add to dashboard Cite

The spiking of metals into sediments lowers pH, raises the oxidative state, and exacerbates the partitioning of Fe, Mn, and spiked metal to the porewater. This study reports the geochemical response of three sediments of varying metal-binding capacity to Cu-/Zn-additions and the influence of pH-adjustment on the major metal-partitioning processes. The increase in redox potential and porewater metal concentrations observed in metal-spiked sediment was minimized by sediment neutralization to pH 7 irrespective of sediment type. In the presence of minimal sulfide concentrations, porewater metal concentrations suggested a greater affinity of copper for organic carbon than zinc, which was thought more dependent on iron oxyhydroxide phases. The amount of iron in the porewater of metal-spiked pH adjusted sediment was, in turn, affected by the type and concentration of spiked metal in the porewater. Increasing porewater concentrations of copper and zinc corresponded to decreasing and increasing porewater iron concentrations, respectively. Porewater copper appeared to act as a toxicant of Fe(III) reducing bacteria, while porewater zinc is thought to have had a stimulatory effect. The present study provides further insight on geochemical changes occurring to metal-spiked sediments and their implications for the interpretation of toxicity tests.

show abstract

Section: General Methods and Reagentsmentioning

confidence: 99%

The Effect of Sediment Type and pH-Adjustment on the Porewater Chemistry of Copper- and Zinc-Spiked Sediments

Hutchins

Teasdale

Lee

et al. 2008

Soil and Sediment Contamination: An International Journal

View full text Add to dashboard Cite

show abstract

“…When the concentration of redox ions are relatively high (10 À4 M), such analyses are carried out using metal indicator electrodes (typically platinum electrodes) and measuring potentiometrically what is referred to as the E H value (see for example ref. [73]). However, such analyses are seriously limited by the lack of sensitivity of the method and because the platinum electrode is easily poisoned by surfactants and organics present in natural samples.…”

Section: Methodsmentioning

confidence: 99%

Ionomer-Coated Electrodes and Nanoelectrode Ensembles as Electrochemical Environmental Sensors: Recent Advances and Prospects

2002

View full text Add to dashboard Cite

“…The TP concentrations in sediments under fish cages in the Mediterranean Sea observed by authors such as Karakassis et al (1998) and Porrello et al (2005), were of an order of magnitude that was similar to the concentrations found in this study. Eh in the sediments is a key factor in determining the biochemical transformation of organic matter as well as distribution, type and physiological activity of bacteria and other microorganisms found in the sediment (Teasdale, Minett, Dixon, Lewis & Batley 1998). Eh was measured in the uppermost sediment layer.…”

Section: Sedimentmentioning

confidence: 99%

Environmental effects of a marine fish farm of gilthead seabream (Sparus aurata) in the NW Mediterranean Sea on water column and sediment

et al. 2013

View full text Add to dashboard Cite

WileyMorata Higón, T.; Falco Giaccaglia, SL.; Gadea, I.; Sospedra Ciscar, J.; Rodilla Alamá, M. (2013). Environmental effects of a marine fish farm of gilthead seabream (Sparus aurata) This study examined the effects of organic enrichment on water column, sediments and macrofauna caused by a fish farm in the Mediterranean Sea. Samples were collected on four sampling campaigns over a one-year cycle. Significant differences were found in the water column in dissolved oxygen, dissolved inorganic nitrogen, phosphate and total phosphorus concentrations between the fish farm and the control. The increase in the dissolved inorganic nitrogen and phosphate concentrations at the fish farm modified the stoichiometric ratios between nutrients, with silicate acting as limiting nutrient at the fish farm 11% more than at the control. Nevertheless, chlorophyll a concentration in the water column was higher at the control station, probably due to the fouling of the underwater fish farm structures. Significant differences were found in sediment concentrations of organic matter, total phosphorus and redox potential between the fish farm and the control. The Canonical Correlation Analysis indicated that organic matter, total phosphorus, redox potential and % of gravels accounted for 68.9% of the total variance in the species data. Changes were observed in macrofauna, with a decrease in number of species and up to a nine-fold increase in abundance with respect to the control.

show abstract

Practical improvements for redox potential (EH) measurements and the application of a multiple-electrode redox probe (MERP) for characterising sediment in situ

Cited by 39 publications

References 16 publications

The Effect of Sediment Type and pH-Adjustment on the Porewater Chemistry of Copper- and Zinc-Spiked Sediments

The Effect of Sediment Type and pH-Adjustment on the Porewater Chemistry of Copper- and Zinc-Spiked Sediments

Ionomer-Coated Electrodes and Nanoelectrode Ensembles as Electrochemical Environmental Sensors: Recent Advances and Prospects

Environmental effects of a marine fish farm of gilthead seabream (Sparus aurata) in the NW Mediterranean Sea on water column and sediment

Contact Info

Product

Resources

About