Toxicological and ecotoxicological assessment of water tracers

Behrens, H.; Beims, U.; Dieter, Hermann H.; Dietze, Gabriele; Eikmann, Thomas; Grummt, Tamara; Hanisch, H.; Henseling, H.; Käß, W.; Kerndorff, H.; Leibundgut, Christian; Müller‐Wegener, U.; Rönnefahrt, Ines; Scharenberg, B.; Schleyer, Ruprecht; Schloz, W.; Tilkes, F.

doi:10.1007/s100400100126

Cited by 98 publications

(74 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…in the borehole. This low-ecotoxicity dye (Jensen and Kristensen, 1999;Behrens et al, 2001) would eventually mix into the lake to a concentration of 1 p.p.t. and thus its use was consistent with the recommendations of the US National Research Council (2007).…”

Section: Sampling and Chemical Analysesmentioning

confidence: 99%

An oligarchic microbial assemblage in the anoxic bottom waters of a volcanic subglacial lake

et al. 2008

View full text Add to dashboard Cite

In 2006, we sampled the anoxic bottom waters of a volcanic lake beneath the Vatnajö kull ice cap (Iceland). The sample contained 5 Â 10 5 cells per ml, and whole-cell fluorescent in situ hybridization (FISH) and PCR with domain-specific probes showed these to be essentially all bacteria, with no detectable archaea. Pyrosequencing of the V6 hypervariable region of the 16S ribosomal RNA gene, Sanger sequencing of a clone library and FISH-based enumeration of four major phylotypes revealed that the assemblage was dominated by a few groups of putative chemotrophic bacteria whose closest cultivated relatives use sulfide, sulfur or hydrogen as electron donors, and oxygen, sulfate or CO 2 as electron acceptors. Hundreds of other phylotypes are present at lower abundance in our V6 tag libraries and a rarefaction analysis indicates that sampling did not reach saturation, but FISH data limit the remaining biome to o10-20% of all cells. The composition of this oligarchy can be understood in the context of the chemical disequilibrium created by the mixing of sulfidic lake water and oxygenated glacial meltwater.

show abstract

Section: Sampling and Chemical Analysesmentioning

confidence: 99%

An oligarchic microbial assemblage in the anoxic bottom waters of a volcanic subglacial lake

et al. 2008

View full text Add to dashboard Cite

show abstract

“…1), two of the most commonly used fluorescent dye tracers, both of which are considered to be toxicologically and ecotoxicologically safe (Behrens et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Octanol-water partition coefficients (Kow) vs. pH for fluorescent dye tracers (fluorescein, eosin Y), and implications for hydrologic tracer tests

Oba

Poulson

2012

Geochem. J.

View full text Add to dashboard Cite

Values of the octanol-water partition coefficient (K ow ) have been measured vs. pH for two fluorescent dyes (fluorescein, eosin Y) commonly used in hydrologic tracer tests. Values for both fluorescent dyes are similar, with slightly larger values for fluorescein vs. eosin Y at any given pH. Measured values of log K ow show a negative correlation vs. pH, and range from 2.78 for fluorescein (pH 4.29) to -1.22 for eosin Y (pH 7.63). Values of log K ow have been used to calculate example values of the organic matter-water partition coefficient (K om ) and the retardation coefficient (R), and suggest that fluorescein and eosin Y act as excellent hydrologic tracers at pH > 7, but become increasingly non-conservative at pH < 7. The results illustrate the importance of pH upon fluorescent dye speciation, and upon fluorescent dye adsorption behavior. Hence, measurement of pK a and the variation of log K ow vs. pH for other fluorescent dye tracers is recommended.

show abstract

“…1: inflow of the settling pond). Because impurities in rhodamine B are assumed to be potentially carcinogenic and might be lethal to fish, the dosage was chosen so that the concentration at the points of discharge (SPD and OWL) was significantly below the LD 50 (50% lethal dose) for fish (314 mg L -1 ; Behrens et al 2001;Field et al 1995). Concerning the term Na-fluorescein, there seem to be some misunderstandings in the English literature, because many reports have used the word fluorescein when the author actually used Na-fluorescein (Quinlan 1989).…”

Section: Methodsmentioning

confidence: 99%

Tracer Test in a Settling Pond: The Passive Mine Water Treatment Plant of the 1 B Mine Pool, Nova Scotia, Canada

Wolkersdorfer

2011

Mine Water Environ

View full text Add to dashboard Cite

In order to verify why the design criteria of the Neville Street well field of the 1 B mine pool passive treatment plant were not being met, four mine water tracer tests with uranine (Na-fluorescein) and rhodamine B were conducted in the system's settling pond. Both tracers were injected at the pond's aeration cascade during three separate tracer tests with varying flow conditions (54-158 L s -1 ). In addition, oxygen saturation and iron concentrations were measured during the first two tests. The aeration cascade works properly; O 2 saturation reaches 81% after less than a second. However, the mean residence time in the settling pond was determined to be only 10-18 h. The plant operator installed five baffle sheets to increase the mean residence time in the settling pond. Tracer tests with uranine after the baffle sheets were installed revealed a new mean residence time of 35 h.

show abstract

Toxicological and ecotoxicological assessment of water tracers

Cited by 98 publications

References 4 publications

An oligarchic microbial assemblage in the anoxic bottom waters of a volcanic subglacial lake

An oligarchic microbial assemblage in the anoxic bottom waters of a volcanic subglacial lake

Octanol-water partition coefficients (Kow) vs. pH for fluorescent dye tracers (fluorescein, eosin Y), and implications for hydrologic tracer tests

Tracer Test in a Settling Pond: The Passive Mine Water Treatment Plant of the 1 B Mine Pool, Nova Scotia, Canada

Contact Info

Product

Resources

About