Magnesium and calcium concentrations in the surface water and bottom deposits of a river-lake system

Szymczyk, S.; Potasznik, Angela

doi:10.5601/jelem.2014.19.4.788

Cited by 45 publications

(50 citation statements)

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“…The results confirm the influence on the water from: surface runoffs, meltwater from streets, tributaries which contain sewage from adjacent industrials areas and the rain drainage water. The effects of the anthropogenic impact on the flowing water quality in urban areas were also found by other researchers [19,20].Using salt for winter road maintenance (the area of Aleja Krakowska and 17 Stycznia Street) in the winter season causes the inflows of highly saline meltwater to the Służewiecki Stream, therefore the high chlorides concentration in the Stream.…”

Section: Discussionsupporting

confidence: 58%

The water quality of streams located in large urban agglomeration, case study of the SłuŻewiecki Stream

2018

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The quality assessment of watercourse, located in a highly urbanized area was the goal of research. The Służewiecki Stream, which flows in the southern part of the capital city of Warsaw is the subject of study. The aim of the research was to determine the tendency of the water quality changes in the Służewiecki Stream, flowing in the highly urbanized area and being a sink of the non-point and industry sources of pollutions as well as the surface runoffs which comes from its catchment. The field research was conducted along the entire length of the stream in 2015 and 2016. The water samples were collected monthly from a depth to 20 cm. Water quality tests were carried out in accordance with the valid analytical methods. The obtained results point to poor water quality. Therefore it can be conducted that the development and use of the direct catchment is the one of main factors affecting the water quality in Służewiecki Stream. The tributaries, often not inventoried, from built-up, populated areas, are the most polluted. Tributaries contain large amount of organic compounds and nutrients.

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Section: Discussionsupporting

confidence: 58%

The water quality of streams located in large urban agglomeration, case study of the SłuŻewiecki Stream

2018

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“…Thus, the spatial distribution of the heavy metals studied depends on the intensity of water exchange in the water body, which is a medium responsible for the substance input and output. Beside the transportation and retention roles, the river is therefore a factor that significantly modifies the bottom structure, including organic and mineral composition, in a cascade of flow-through lakes [2,15].…”

Section: Discussionmentioning

confidence: 99%

“…The lakes are connected by the Symsarna River, which actively transports deposits between these water bodies, making some of them deeper (like Luterskie Lake) orby contributing to the deposition of the material-shallower (like Ławki Lake). The river flow may lift the matter accumulated at the bottom of successive water bodies and transport it to more remote ones in the system, and the average flow of Symsarna River before inflow to lake was 0.923 m 3 ·s −1 [15]. This feature makes the Symsarna river-lake system peculiar because some of the introduced pollutants undergo transport and deposition in the successive lakes.…”

Section: Study Area and Sampling Sitesmentioning

confidence: 99%

Heavy Metal Contamination in the Surface Layer of Bottom Sediments in a Flow-Through Lake: A Case Study of Lake Symsar in Northern Poland

Kuriata-Potasznik

Szymczyk

Skwierawski

et al. 2016

Water

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River-lake systems most often behave as hydrographic units, which undergo complex interactions, especially in the contact zone. One such interaction pertains to the role of a river in the dispersal of trace elements carried into and out of a lake. In this study, we aimed to assess the impact of rivers on the accumulation of heavy metals in bottom sediments of natural lakes comprised in postglacial river-lake systems. The results showed that a river flowing through a lake is a key factor responsible for the input of the majority of available fraction of heavy metals (Zn, Mn, Cd and Ni) into the water body and for their accumulation along the flow of river water in the lake. The origin of other accumulated elements were the linear and point sources in catchments. In turn, the Pb content was associated with the location of roads in the direct catchment, while the sediment structure (especially size of fraction and density) could have affected the accumulation of Cr and Zn, which indicated correlations between these metals and fine fraction. Our results suggest that lakes act as filters and contribute to the self-purification of water that flows through them. As a result, the content of most metals in lake sediments showed a decrease by approx. 75% between the upstream (inflow) and downstream (outflow) sections. The increased content of two metals only, such as chromium and cadmium (higher by 2.0 and 2.5 times, respectively, after passing through the lake), was due to the correlation of the metals with fine sand. Both the content and distribution pattern of heavy metals in lake sediments are indicative of the natural response of aquatic ecosystems to environmental stressors, such as pollutant import with river water or climate change. The complex elements creating the water ecosystem of each lake can counteract stress by temporarily removing pollutants such as toxic metals form circulation and depositing them mostly around the delta.

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“…This test water has the lowest Ca 2+ content (0.044 mmol/L) of any available test standardized test water. 29 Relative to higher Ca 2+ concentration/hardness media, VSW and comparable low hardness media have been shown to enable higher stability of carbon NMs, 30 3) may be considered more amenable to modeling relative to other media with a more complex ionic composition. There is a very large database of standardized toxicity tests using this test system for both traditional substances and NMs; 26,42 because of this coalescence around MHW use for toxicity tests, it makes sense to adopt similar media for exposure research as well.…”

Section: Discussionmentioning

confidence: 99%

“…It is a USA-centric test water that may be used less frequently relative to OECD and ISO test media in laboratories outside of the USA and is not used in OECD testing standards (which are internationally recognized). Its Ca-Mg ratio is not representative of surface waters under certain conditions, 29 and its sulfate and chloride concentrations are too high and low, respectively, for idealized NM exposure testing scenarios. However, this is balanced by the reproduceability and ease of synthesis of the water with appropriate hardness, pH, and ionic strength.…”

Section: Discussionmentioning

confidence: 99%

Harmonizing across environmental nanomaterial testing media for increased comparability of nanomaterial datasets

Geitner

Hendren

Cornelis

et al. 2020

Environ. Sci.: Nano

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Magnesium and calcium concentrations in the surface water and bottom deposits of a river-lake system

Cited by 45 publications

References 0 publications

The water quality of streams located in large urban agglomeration, case study of the SłuŻewiecki Stream

The water quality of streams located in large urban agglomeration, case study of the SłuŻewiecki Stream

Heavy Metal Contamination in the Surface Layer of Bottom Sediments in a Flow-Through Lake: A Case Study of Lake Symsar in Northern Poland

Harmonizing across environmental nanomaterial testing media for increased comparability of nanomaterial datasets

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