Wyniki wyszukiwania dla: bottom sediment

• INVESTIGATION OF BOTTOM SEDIMENT STRATIFICATION

  Publikacja

  • G. Grelowska
  • E. Kozaczka

  - HYDROACOUSTICS - Rok 2014

  The main goal of this paper is to find a method to assess remotely the type of sediments on the basis of the signal received using the parametric echosounder. The images of the sea bottom sediments taken by a parametric echosounder show the fine structure of the upper layer of the bottom sediments. The depth of penetration depends on the type of sediment, in fact on the attenuation of acoustic wave. In the paper the method of distinguishing...

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• Polychlorinated biphenyls (PCBs) in bottom sediments: Identification of sources

  Publikacja

  • L. Wolska
  • A. Mechlińska
  • J. Rogowska
  • J. Namieśnik

  - CHEMOSPHERE - Rok 2014

  Polychlorinated biphenyls (PCBs) can enter the environment from various sources. They are synthetic chemicals and as such are present in the environment mainly as mixtures containing various amounts of PCB congeners. It is therefore difficult to pinpoint the source of PCB emissions into the environment and the pathways along which they migrate there. The situation is different where locating the emission sources of polycyclic aromatic...

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• The effect of adding a standard on the result of determination of polychlorinated biphenyls in bottom sediment samples

  Publikacja

  • A. Mechlińska
  • L. Wolska
  • J. Namieśnik

  - TALANTA.The International Journal of Pure and Applied Analytical Chemistry - Rok 2010

  Bottom sediments are a very important component of aquatic ecosystems. The sediment matrix is highly diverse and heterogeneous; in consequence, compounds entering the aquatic environment from different sources are considerably enriched at its surface. Bottom sediments are regarded as natural sorbents, since they accumulate many harmful substances, such as heavy metals and stable organic contaminants.Extraction is a key stage in...

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• Observation of sub-bottom sediment in the southern baltic by means of onlinear acoustics method

  Publikacja

  • E. Kozaczka

  - Rok 2008

  W pracy przedstawiono wyniki badań struktury osadów dennych Bałtyku Południowego metodami akustyki nieliniowej.

• Development of potential candidate reference materials for drugs in bottom sediment, cod and herring tissues

  Publikacja

  • I. Baranowska
  • B. Buszewski
  • J. Namieśnik
  • P. Konieczka
  • S. Magiera
  • H. Polkowska-Motrenko
  • P. Kościelniak
  • R. Gadzała-Kopciuch
  • A. Woźniakiewicz
  • Z. Samczyński... i 2 innych

  - CHEMOSPHERE - Rok 2017

  Regular use of a reference material and participation in a proficiency testing program can improve the reliability of analytical data. This paper presents the preparation of candidate reference materials for the drugs metoprolol, propranolol, carbamazepine, naproxen, and acenocoumarol in freshwater bottom sediment and cod and herring tissues. These reference materials are not available commercially. Drugs (between 7 ng/g and 32...

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• Sediment

  Czasopisma

  ISSN: 1438-9495

• Annual changes of basic parameters of bottom sediments from the Klodnica River Catchment

  Publikacja

  • E. Olkowska
  • M. Ruman
  • Ż. Polkowska

  - Rok 2014

  The Klodnica River Catchment is heavily contaminated ecosystem located in area of the Upper Silesia Industrial Region. In this area various forms of human activity can be observed (e.g. mining coal underground, metallurgy, power/heat plants, wastewater discharged directly into the river). The impact of industrial and municipal wastes on this aquatic system causes to changes in the hydrographic network of river and the waters quality. In...

• Methods of Assessment of Metal Contamination in Bottom Sediments (Case Study: Straszyn Lake, Poland)

  Publikacja

  • E. Kulbat
  • A. Sokołowska

  - ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY - Rok 2019

  The concentrations of six metals (Zn, Cu, Pb, Ni, Cr, and Cd) were investigated in bottom sediments of Straszyn Lake (North Poland). This study was designed to determine a total content of metals and to assess their mobility and bioavailability. The sequential extraction was used to fractionate metals into five fractions: exchangeable, bound to carbonates, bound to Fe–Mn oxides, bound to organic matter, and residual. The evaluation...

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• Distribution of pollutants in the Odra River system part III. Organic pollutants in bottom sediments

  Publikacja

  • L. Wolska
  • J. Namieśnik

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Rok 2002

  W pracy przedstawiono wyniki badań próbek osadów dennych pobranych (w okresie 1997-2000) w ramach Międzynarodowego Programu Badań Dorzecza Rzeki Odry (w trakcie 8 Kampanii) na zawartość szerokiej gamy związków organicznych (pestycydy, lotne związki organiczne, wielopierścieniowe węglowodory aromatyczne, chlorobenzeny, polichlorowane bifenyle).

• Miniaturised analytical procedure of determining polycyclic aromatic hydrocarbons and polychlorinated biphenyls in bottom sediments

  Publikacja

  • L. Wolska

  - JOURNAL OF CHROMATOGRAPHY A - Rok 2002

  Opisano metodę oznaczania bardzo niskich stężeń polichlorowanych bifenyli w obecności wysokich zawartości wielopierścieniowych węglowodorów aromatycznych. Analizie techniką GC-MS poddawany jest ekstrakt z 1 g próbki osadu. Jako standardy wewnętrzne zastosowano Naftalen-d8, benzo[a]antracen-d12 i PCB 209. Średni odzysk standardów przedstawiał się następująco: 65, 55 i 60% odpowiednio. Do izolacji frakcji PCB stosowano niekomercyjne...