Distribution of estrogen, nonylphenol and its derivatives in the sediments of a shallow lake

2004 ◽  
Vol 50 (5) ◽  
pp. 173-179 ◽  
Author(s):  
K. Mibu ◽  
J. Wada ◽  
Y. Okayasu ◽  
J. Tsumori ◽  
K. Komori ◽  
...  
Keyword(s):  
Endocrine Disruptors ◽  
Lake Water ◽  
Eutrophic Lake ◽  
Field Investigation ◽  
Concentration Profiles ◽  
Nonylphenol Ethoxylates ◽  
The Core ◽  
17Β Estradiol ◽  
Benthic Sediments ◽  
Acetic Acids

To determine the distribution of endocrine disruptors (EDs) in lake water and sediments, field investigation was conducted in Lake Teganuma, which is a shallow eutrophic lake, highly affected by human activities. Concentration profiles with sediment depths were obtained for estrogens, nonylphenol (NP), nonylphenol ethoxylates (NPnEO), and nonylphenoxy acetic acids (NPnEC). 17β-Estradiol (E2) was rarely detected, and 17α-ethynylestradiol (EE2) and estriol (E3) were undetected at all depths (0-98 cm) in any of the sediment core samples. The sediment concentrations of estrone (E1) ranging from <0.05 to 3.5 μg/kg-dry wt. and NP from 11.8 μg/kg-dry wt. to 21 μg/kg-dry wt. were obtained. The maximum concentrations of NPnEO and NPnEC in the core sediments were 2.5 μg/kg-dry wt. and 1.4 μg/kg-dry wt., respectively. The EDs concentrations are higher at the inlet than at the outlet (except for NP) in the sediments near the surface. The longitudinal distributions of E1, NPnEO and NPnEC in the benthic sediments show that the concentrations are highest at the inlet, and are fairly constant at lower levels towards the downstream. The obtained results also indicate that NP tends to be adsorbed to the organic particulates produced by algae, followed by sedimentation near the outlet of the lake.

scholarly journals Phosphorous Supply to a Eutrophic Artificial Lake: Sedimentary versus Groundwater Sources

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 563
Author(s):  
Wiebe Förster ◽  
Jan C. Scholten ◽  
Michael Schubert ◽  
Kay Knoeller ◽  
Nikolaus Classen ◽  
...  
Keyword(s):  
Water Quality ◽  
Stable Isotope ◽  
Pore Water ◽  
Lake Water ◽  
Sediment Cores ◽  
Eutrophic Lake ◽  
Stable Water Isotopes ◽  
Artificial Lake ◽  
Sediment Pore Water ◽  
Mass Balance Models

The eutrophic Lake Eichbaumsee, a ~1 km long and 280 m wide (maximum water depth 16 m) dredging lake southeast of Hamburg (Germany), has been treated for water quality improvements using various techniques (i.e., aeration plants, removal of dissolved phosphorous by aluminum phosphorous precipitation, and by Bentophos® (Phoslock Environmental Technologies, Sydney, Australia), adsorption) during the past ~15 years. Despite these treatments, no long-term improvement of the water quality has been observed and the lake water phosphorous content has continued to increase by e.g., ~670 kg phosphorous between autumn 2014 and autumn 2019. As no creeks or rivers drain into the lake and hydrological groundwater models do not suggest any major groundwater discharge into the lake, sources of phosphorous (and other nutrients) are unknown. We investigated the phosphorous fluxes from sediment pore water and from groundwater in the water body of the lake. Sediment pore water was extracted from sediment cores recovered by divers in August 2018 and February 2019. Diffusive phosphorous fluxes from pore water were calculated based on phosphorus gradients. Stable water isotopes (δ2H, δ18O) were measured in the lake water, in interstitial waters in the banks surrounding the lake, in the Elbe River, and in three groundwater wells close to the lake. Stable isotope (δ2H, δ18O) water mass balance models were used to compute water inflow/outflow to/from the lake. Our results revealed pore-water borne phosphorous fluxes between 0.2 mg/m2/d and 1.9 mg/m2/d. Assuming that the measured phosphorous fluxes are temporarily and spatially representative for the whole lake, about 11 kg/a to 110 kg/a of phosphorous is released from sediments. This amount is lower than the observed lake water phosphorous increase of ~344 kg between April 2018 and November 2018. Water stable isotope (δ2H, δ18O) compositions indicate a water exchange between an aquifer and the lake water. Based on stable isotope mass balances we estimated an inflow of phosphorous from the aquifer to the lake of between ~150 kg/a and ~390 kg/a. This result suggests that groundwater-borne phosphorous is a significant phosphorous source for the Eichbaumsee and highlights the importance of groundwater for lake water phosphorous balances.

Mixture Effects of 3 Mechanistically Different Steroidogenic Disruptors (Prochloraz, Genistein, and Ketoconazole) in the H295R Cell Assay

2015 ◽  
Vol 34 (6) ◽  
pp. 534-542 ◽  
Author(s):  
Frederik Knud Nielsen ◽  
Cecilie Hurup Hansen ◽  
Jennifer Anna Fey ◽  
Martin Hansen ◽  
Bent Halling-Sørensen ◽  
...  
Keyword(s):  
Cell Line ◽  
Endocrine Disruptors ◽  
Mixture Toxicity ◽  
Concentration Addition ◽  
Mixture Effects ◽  
Modes Of Action ◽  
Cell Assay ◽  
17Β Estradiol ◽  
H295r Cells ◽  
The Individual

Mixture effects of 3 model endocrine disruptors, prochloraz, ketoconazole, and genistein, on steroidogenesis were tested in the adrenocortical H295R cell line. Seven key steroid hormones (pregnenolone, progesterone, dehydroepiandrosterone, androstenedione, testosterone, estrone, and 17β-estradiol) were analyzed using gas chromatography and tandem mass spectrometry (GC-MS/MS) to investigate the effects throughout the steroidogenic pathway. Current modeling approaches often rely on models assuming compounds acting independently and that the individual effects in some way can be summarized to predict a mixture effect. In H295R cells with an intact steroidogenic pathway, such assumptions may not be feasible. The purpose of this study was therefore to evaluate whether effects of a mixture with differing modes of action followed or deviated from additivity (concentration addition) and whether the H295R cell line was suitable for evaluating mixture toxicity of endocrine disruptors with different modes of action. The compounds were chosen because they interfere with steroidogenesis in different ways. They all individually decrease the concentrations of the main sex steroids downstream but exert different effects upstream in the steroidogenic pathway. Throughout the study, we observed lowest observed effect concentrations of mixtures at levels 2 to 10 times higher than the predicted EC50, strongly indicating antagonistic effects. The results demonstrate that chemical analysis combined with the H295R cell assay is a useful tool also for studying how mixtures of endocrine disruptors with differing modes of action interfere with the steroidogenic pathway and that existing models like concentration addition are insufficient in such cases. Furthermore, for end points where compounds exert opposite effects, no relevant models are available.

Water quality studies in Kranji catchment, Singapore: use of organic tracers and polyethylene devices for identifying potential sewage sources

2012 ◽  
Vol 7 (2) ◽  
Author(s):  
A. R. Mendez Sagel ◽  
P. Shanahan ◽  
J. K. MacFarlane ◽  
P. M. Gschwend
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Endocrine Disruptors ◽  
Passive Samplers ◽  
Nonylphenol Ethoxylates ◽  
Residential Areas ◽  
Future Studies ◽  
Rivers And Streams ◽  
Laboratory Results ◽  
Polyethylene Devices

The objective of this study was to identify organic compounds that could serve as indicators of potential human fecal contamination sources to the Kranji Reservoir in Singapore and could be used as confirmation indicators along with bacteria indicators. The compounds chosen as potential tracers were nonylphenol (NP) and nonylphenol ethoxylates (NPEs), as these are indicative of sewage and have been found at measurable concentrations in rivers and streams elsewhere in Asia. Polyethylene devices (PEDs) were used as passive samplers to measure NP and NPEs in stormwater drains in Kranji Catchment, deployed in areas of different land use in order to obtain an overview of concentration ranges across the catchment and provide an indication of where and why these compounds could be found. Laboratory results showed that NP and NPEs were present in non-residential areas and preliminary modeling of corresponding water concentrations indicates potentially risky concentrations of NP in the water in some stormwater drains. More information is needed on detergents in Singapore to further evaluate using NPEs as sewage indicators. Future studies should be done to confirm concentrations in Kranji Catchment water to verify if there is a risk to the ecosystem's health as NP and NPEs are known endocrine disruptors.

Effects of endocrine disruptors on genes associated with 17β-estradiol metabolism and excretion

Steroids ◽  
2008 ◽  
Vol 73 (12) ◽  
pp. 1242-1251 ◽  
Author(s):  
Nathalie Hanet ◽  
Allan Lancon ◽  
Dominique Delmas ◽  
Brigitte Jannin ◽  
Marie-Christine Chagnon ◽  
...  
Keyword(s):  
Endocrine Disruptors ◽  
17Β Estradiol ◽  
Estradiol Metabolism

Characterization of the light field in laboratory scale enclosures of eutrophic lake water (Lake Loosdrecht, The Netherlands)

Hydrobiologia ◽  
1992 ◽  
Vol 238 (1) ◽  
pp. 99-109 ◽  
Author(s):  
Herman J. Gons ◽  
Jacco Kromkamp ◽  
Machteld Rijkeboer ◽  
Oscar Schofield
Keyword(s):  
The Netherlands ◽  
Lake Water ◽  
Light Field ◽  
Eutrophic Lake ◽  
Laboratory Scale ◽  
Water Lake ◽  
Eutrophic Lake Water

Nitrogen dynamics of a large-scale constructed wetland used to remove excess nitrogen from eutrophic lake water

2013 ◽  
Vol 61 ◽  
pp. 224-234 ◽  
Author(s):  
Ed J. Dunne ◽  
Michael F. Coveney ◽  
Erich R. Marzolf ◽  
Victoria R. Hoge ◽  
Roxanne Conrow ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Lake Water ◽  
Large Scale ◽  
Eutrophic Lake ◽  
Nitrogen Dynamics ◽  
Excess Nitrogen ◽  
Eutrophic Lake Water

Decomposition of water hyacinth detritus in eutrophic lake water

Hydrobiologia ◽  
1991 ◽  
Vol 211 (2) ◽  
pp. 101-109 ◽  
Author(s):  
K. R. Reddy ◽  
W. F. DeBusk
Keyword(s):  
Lake Water ◽  
Water Hyacinth ◽  
Eutrophic Lake ◽  
Eutrophic Lake Water ◽  
Decomposition Of Water

IRON METABOLISM IN TWO BASINS OF A LAKE NEAR OSLO, NORWAY

1970 ◽  
Vol 1 (3) ◽  
pp. 158-180 ◽  
Author(s):  
ANDERS BØYUM
Keyword(s):  
Organic Matter ◽  
Iron Metabolism ◽  
Deep Water ◽  
Lake Water ◽  
Critical Concentration ◽  
Coniferous Forest ◽  
Eutrophic Lake ◽  
Allochthonous Organic Matter ◽  
Dystrophic Lake ◽  
Eutrophic Lake Water

Langlivann and Himtjern are two basins in a lake situated on rocks poor in lime and with coniferous forest and bogs in the surroundings. The lake is fundamentally oligotrophic. The influence of allochthonous organic matter is shown by lake colours which are different shades of brown, and by water colours which at the surface are from 15 to 25 on the mg Pt/1 scale. Some differences in hydrology and morphology make the thermal and oxygen stratifications different in the two basins. At certain periods iron is accumulated in great quantities in the deep water. The differences, both in time and depth, in oxygen concentration make it possible to study the influence of this element on the reduction/oxidation of iron. An attempt has been made to find the critical concentration of oxygen. The value found by Einsele (1940) in eutrophic lake water seems also to be valid in this dystrophic lake. The development of dichotomous pH stratifications is shown. They seem to confirm the above statement.

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