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Number of results: 7
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Abstract

In the presented work the limnological characteristics of the Reservoir Nakło-Chechło elaborated on the basis of investigations carried out in 1996 has been shown. The results of investigations on thermal and oxygenic conditions existing in the Reservoir and the change dynamics of selected physico-chemical indicators of water quality in the Reservoir Nakło-Chechło are described. The paper describes aspecific example of acidotrophy of the Nakło-Chechło Reservoir as a result of anthropopressure. The results of chemical analysis of water in the Nakło-Chechło Reservoir and evaluation of the dynamic changes of various indicators with the atmospheric precipitation quantity on the basin superficies have shown that the Reservoir is under strong hydrological and chemical influence of the precipitation, which generally is acidic and has a very low total hardness. The exceptional vulnerability for acidification due to deficiency in water buffering capacity was, however, the decisive factor. The discharged weak buffering capacity of the Reservoir water facilitates the influence of direct precipitation and through superficial run off. The results of chemical analysis show high state of water quality in the Reservoir Nakło-Chechło as regards amount of indicators which describe water mineralization degree.
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Authors and Affiliations

Maciej Kostecki
Agata Domurad
Eligiusz Kowalski
Jerzy Kozłowski
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Abstract

The aim of the present work was to analyse the results of investigations on the heavy metals content in the water of the Nakło-Chechło Reservoir. In this study the importance of this element in the characteristic of aquatic environment is stressed. Small content of heavy metals has excluded the possibility of the discharge of municipal and industrial sewage. All of these toxic substance included in water have confirmed that the Nakło- Chechło Reservoir is under strong hydrological and chemical influence of the precipitation and surface run off from the Reservoir basin area.
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Authors and Affiliations

Agata Domurad
Maciej Kostecki
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Abstract

The paper presents the conversion dynamics of basic nitrogen and phosphorus forms as main factors initiating eutrophication process in Naklo-Chechlo reservoir. Limnological investigations of recreation reservoir were carried out in the period from January to December 1996. The results of chemical analyses of water samples taken in two collecting points of the reservoir and a composition of surface run-off from the basin area, have been presented.
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Authors and Affiliations

Maciej Kostecki
Agata Domurad
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Abstract

The landslide is located in Wronki. It covers the southern side on the bank of the Warta River and occupy an area of 500 m in length. The landslide was once again activated on August 22-23, 2018, causing numerous failures. The Warta River slope in the area of mass movements is built by non-construction embankments, under which the Poznan Miocene–Pliocene of quasi-layered structure lie. There are horizontal interlayers of sandy silts in these clays. The Warta drains water from a large area, and the runoff takes place mainly on the roof of clays. The slide surface of the landslide was precisely the roof of the Poznan clays. Bearing in mind the properties of the Poznan clays, such as relaxation, block disintegration, expansiveness features, the following were considered the direct causes of the failure: heavy rainfall that occurred after a drought, loading of the slope with indiscriminate cubature buildings, construction of a linear sewage system and periodically repeated vibrations caused by the implementation of neighboring investments. In order to identify the area, test boreholes were made, samples were taken for laboratory tests, and geodetic measurements were taken. Based on the obtained results, slope stability calculations were made and a measurement network was developed for systematic monitoring of geodetic displacements of control points. It was recommended to perform drainage to drain the slope and side of the Warta River, plant bushes, and make changes to the land development plan in order to prohibit further development of the area in the endangered zone.
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Authors and Affiliations

Michalina Flieger-Szymanska
1
ORCID: ORCID
Jerzy Sobkowiak
2
ORCID: ORCID
Katarzyna Machowiak
1
ORCID: ORCID
Dorota Anna Krawczyk
1
ORCID: ORCID

  1. Poznan University of Technology, Faculty of Civil and Environmental Engineering, Institute of Civil Engineering, Poznan, Poland
  2. Geomenos Jerzy Sobkowiak, Tomasz Sobkowiak Sp. j., Poznan, Poland; retired employee of Poznan University of Technology
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Abstract

The aim of the study was optimization of antimony speciation methodology in soils in areas subjected to industrial anthropopressure from traffic, metallurgy and recycling of electrowaste (e-waste) sources. Antimony speciation was carried out using the hyphenated HPLC-ICP-MS (High-Performance Liquid Chromatography- Inductively Coupled Plasma-Mass Spectrometry) technique for the determination of antimony species ((Sb(III), Sb(V), SbMe3). The extraction and determination of antimony species in soil was optimized and validated, taking into account the matrix effects. The best results in antimony extraction from soils were obtained using a mixture of 100 mM citric acid and 20 mM Na2EDTA. Ions were successfully separated in 6 minutes on Hamilton PRPX100 column with 0.11 μg/L, 0.16 μg/L, 0.43 μg/L limit of detection for Sb(III), Sb(V), SbMe3, respectively. The oxidized antimony form (Sb(V)) predominated in the soil samples. The reduced antimony form (Sb(III)) was present only in a few samples, characterized by the lowest pH. The methyl derivative of antimony (SbMe3) was present in the samples with the lowest redox potential from the area around WEEE (Waste of Electrical and Electronic Equipment) treatment plant. The methodology of extraction and determination of three antimony species in soils was developed, achieving low limits of quantification and very good recovery. The research showed a large variation in antimony content in the soils impacted by type of industrial anthroporessure. The antimony content was the highest in the area of the WEEE treatment plant, indicating this type of industrial activity as a significant source of soil contamination with antimony.
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Bibliography

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Authors and Affiliations

Magdalena Jabłońska-Czapla
1
ORCID: ORCID
Katarzyna Grygoyć
1
ORCID: ORCID
Marzena Rachwał
1

  1. Institute of Environmental Engineering, Polish Academy of Sciences, Poland
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Abstract

The research determined the concentrations of selected polycyclic aromatic hydrocarbons (PAHs) in water and sediments of Kłodnica River reservoirs and distribution depending on number of rings, ecotoxicological impact on studied ecosystems and possible sources of origin. Samples were subjected to qualitative and quantitative analysis by gas chromatography coupled with a GC-MS mass detector, using a ZB-5MS column and electron ionization. The sum of 16 PAHs in water ranged 0.111–0.301 μg/L (mean 0.200 μg/L) in Dzierżno Duże, 0.0410–0.784 μg/L (mean 0.303 μg/L) in Dzierżno Małe and 0.0920–1.52 μg/L (mean 0.596 μg/L) in Pławniowice. While in sediments respectively: 17.5–37.2 μg/g (mean 26.8 μg/g), 4.33–8.81 μg/g (6.43 μg/g) and 2.27–9.50 μg/g (5.30 μg/g). The concentration of PAHs in sediments of reservoirs, which spatial management of the catchment area accounts for over 90% of agricultural and forest land, was up to eight times lower than in sediments of the reservoir which is 69%, while built-up and transport areas are 24%. In sediments of Dzierżno Małe and Pławniowice PAHs with 5 and 6 rings dominate, while in Dzierżno Duże – 2 and 3 rings. Higher concentrations of PAHs with higher molecular weight, found in the bottom water layers, confirm the role of the sedimentation process in the transport of these compounds in reservoirs. Assessment of sediment quality, based on ecotoxicological criteria, showed that PAHs may cause toxic effects in Dzierżno Duże, while in Dzierżno Małe and Pławniowice can cause sporadic adverse effects. The likely source of PAHs in reservoirs is low emissions.
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Authors and Affiliations

Alina Pohl
Maciej Kostecki
ORCID: ORCID

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