Texture of the Bureya River bottom sediments in the area of the Lower Bureya HPP

2017 ◽  
Vol 72 (1) ◽  
pp. 21-30 ◽  
Author(s):  
G. V. Kharitonova ◽  
E. V. Shein ◽  
V. P. Shesterkin ◽  
A. V. Yudina ◽  
A. V. Dembovetsky ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Bureya Hpp ◽  
River Bottom

scholarly journals Analysis of Spatial Variability of River Bottom Sediment Pollution with Heavy Metals and Assessment of Potential Ecological Hazard for the Warta River, Poland

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 327
Author(s):  
Joanna Jaskuła ◽  
Mariusz Sojka ◽  
Michał Fiedler ◽  
Rafał Wróżyński
Keyword(s):  
Heavy Metals ◽  
Bottom Sediment ◽  
Bottom Sediments ◽  
Risk Index ◽  
Point Sources ◽  
Sediment Pollution ◽  
Sample Collection ◽  
Effect Concentration ◽  
Ecological Hazard ◽  
River Bottom

Pollution of river bottom sediments with heavy metals (HMs) has emerged as a main environmental issue related to intensive anthropopressure on the water environment. In this context, the risk of harmful effects of the HMs presence in the bottom sediments of the Warta River, the third longest river in Poland, has been assessed. The concentrations of Cr, Ni, Cu, Zn, Cd, and Pb in the river bottom sediments collected at 24 sample collection stations along the whole river length have been measured and analyzed. Moreover, in the GIS environment, a method predicting variation of HMs concentrations along the whole river length, not at particular sites, has been proposed. Analysis of the Warta River bottom sediment pollution with heavy metals in terms of the indices: the Geoaccumulation Index (Igeo), Enrichment Factor (EF), Pollution Load Index (PLI), and Metal Pollution Index (MPI), has proved that, in 2016, the pollution was heavier than in 2017. Assessment of the potential toxic effects of HMs accumulated in bottom sediments, made on the basis of Threshold Effect Concentration (TEC), Midpoint Effect Concentration (MEC), and Probable Effect Concentration (PEC) values, and the Toxic Risk Index (TRI), has shown that the ecological hazard in 2017 was much lower. Cluster analysis revealed two main groups of sample collection stations at which bottom sediments showed similar chemical properties. Changes in classification of particular sample collection stations into the two groups analyzed over a period of two subsequent years indicated that the main impact on the concentrations of HMs could have their point sources in urbanized areas and river fluvial process.

Assessment of metals content in river bottom sediments near sewage treatment plants

2020 ◽  
Vol 199 ◽  
pp. 314-322
Author(s):  
Mirosław Skorbiłowicz ◽  
Elżbieta Skorbiłowicz ◽  
Justyna Tkaczuk
Keyword(s):  
Bottom Sediments ◽  
Sewage Treatment ◽  
Sewage Treatment Plants ◽  
River Bottom

Joint analysis of surface‐wave and refraction events from river‐bottom sediments

2000 ◽  
Author(s):  
Julian Ivanov ◽  
Choon B. Park ◽  
Richard D. Miller ◽  
Jianghai Xia ◽  
James A. Hunter ◽  
...  
Keyword(s):  
Surface Wave ◽  
Bottom Sediments ◽  
Joint Analysis ◽  
River Bottom

scholarly journals The Contamination of Sventoji River Bottom Sediments by Heavy Metals in Ukmerge, Lithuania

2016 ◽  
Vol 25 (1) ◽  
pp. 1-10
Author(s):  
Vaidotas Valskys ◽  
Mindaugas Motiejunas ◽  
Gytautas Ignatavicius ◽  
Stanislovas Sinkevicius
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
River Bottom

scholarly journals ANALYSIS AND ASSESSMENT OF HEAVY METALS CONCENTRATIONS IN NEMUNAS RIVER BOTTOM SEDIMENTS AT ALYTUS CITY TERRITORY

2015 ◽  
Vol 23 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Vaidotas VALSKYS ◽  
Roberta VALSKIENĖ ◽  
Gytautas IGNATAVIČIUS
Keyword(s):  
Heavy Metals ◽  
Spatial Distribution ◽  
Bottom Sediments ◽  
Anthropogenic Impact ◽  
River Sediments ◽  
Left Bank ◽  
River Ecosystem ◽  
X Ray ◽  
Left And Right ◽  
River Bottom

Concentrations and spatial distribution of heavy metals on the left and right banks of the river Nemunas bottom sediments are analyzed in this article. The research methodology of X-ray fluorescence spectrometry for bottom sediments and operating principles of XL2 spectrometer used for analysis are overviewed. The results of analysis are presented and compared with LAND 20-2005 requirements as well as studies that were carried out previously. The influence of Alytus city for Nemunas river sediments quality is assessed. Dischargers formed additional samples which were taken and included to the list of ordinary samples. The trend of heavy metals (Cd, Cu, Cr) concentrations showed the growth of pollution downstream the urban area. The estimated Zd (total pollution) values clearly indicated higher contamination by heavy metals on the left bank of Nemunas River. Extensive surveys of river sediments allow assessing the extent of anthropogenic impact, which can be harmful to the river ecosystem and human health.

Enteric bacterial metabolism of stream sediment eluates

1971 ◽  
Vol 17 (4) ◽  
pp. 551-556 ◽  
Author(s):  
Charles W. Hendricks
Keyword(s):  
Bottom Sediments ◽  
Phosphate Buffer ◽  
Nutrient Concentration ◽  
Ammonia Nitrogen ◽  
Bacterial Metabolism ◽  
Adsorptive Capacity ◽  
Flowing Water ◽  
Chemical Analyses ◽  
River Bottom

River bottom sediments, which were washed free of loosely associated chemical nutrients, were further eluted with phosphate buffer. Chemical analyses of the eluates indicated that 0.3 M buffer (pH 7.0) eluted hexose, protein, and ammonia nitrogen in concentrations 4–6 times that found in the free-flowing water. Respiration experiments showed that selected strains of Enterobacteriaceae, including pathogens, had the ability to metabolize these substrates. These studies indicate that bottom sediments can have a high adsorptive capacity and suggest that they can regulate basic nutrient concentration and eutrophication in situ.

Phenoxy herbicides’ interactions with river bottom sediments

2019 ◽  
Vol 19 (10) ◽  
pp. 3620-3630 ◽  
Author(s):  
Mauli Gamhewage ◽  
Annemieke Farenhorst ◽  
Claudia Sheedy
Keyword(s):  
Bottom Sediments ◽  
Phenoxy Herbicides ◽  
River Bottom

Genotoxicity of Don River bottom sediments (2001–2007)

2012 ◽  
Vol 39 (1) ◽  
pp. 118-124 ◽  
Author(s):  
M. A. Sazykina ◽  
V. A. Chistyakov ◽  
I. S. Sazykin
Keyword(s):  
Bottom Sediments ◽  
Don River ◽  
River Bottom

scholarly journals Distribution and factors of accumulation of heavy metals and metaloids in river bottom sediments in the territory of the Ulan-Ude city

2017 ◽  
Vol 25 (3) ◽  
pp. 380-395 ◽  
Author(s):  
N.S. Kasimov ◽  
◽  
I.D. Korlyakov ◽  
N.E. Kosheleva ◽  
◽  
...  
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
River Bottom
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