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1

Differences of chloroorganic pesticides and polychlorinated biphenyls bioaccumulation in selected organisms from the Gulf of Gdansk

100%
Sapota G.
Oceanological Studies
|
2002
|
vol. 31
|
issue 1-2
91-97
EN
Organochlorine pesticides such as DDT and its metabolites (p,p?-DDT, o,p?-DDT, p,p?-DDD, p,p?-DDE), hexachlorocyclohexane isomers (alpha, beta and gamma (-HCH), hexachlorobenzene (HCB) and selected PCB congeners (28, 52, 101, 118, 138, 153, 180) were analysed in plankton, benthic organisms (Cerastoderma glaucum, Mytilus trossulus, Macoma balthica, Crangon crangon), muscle tissue of fish (Zoarces viviparus, Myoxocephalus scorpius, Clupea harengus, Salmo trutta) and birds (Phalacrocorax carbo, Larus ridibundus). We can observe clear differences in the bio-accumulation pattern of these toxic substances in pelagic organisms or benthos and bottom feeding fish.
2

The comparison of biosorption and bioaccumulation of microelement by macroalga Vaucheria sessilis

100%
Michalak I., Chojnacka K.
Biotechnologia
|
2010
|
issue 1
132-146
EN
In the present paper, two methods, which are used to bind metal ions form aqueous solutions by the biomass ? biosorption and bioaccumulation, were compared. These processes could find potential application in the production of mineral feed additives from the biomass of macroalga - Vaucheria sessilis, which will constitute a carrier of highly bioavailable microelements (Zn(II), Mn(II), Cu(II) and Co(II)) for animals. However, there are essential differences between these processes: the first one concerns fresh biomass, the second one ? dry biomass. The aim of the work was to choose the method of the biomass enrichment. The equilibrium capacities for biosorption process were higher than in case of bioaccumulation for the same process parameters ? for Co(II) ions, the biosorption capacity was 37,9% higher than for bioaccumulation, for Cu(II) ions ? 27,4% higher, for Mn(II) ? 17,7% higher, and for Zn(II) ? 9,33%. Also, the rate constants for biosorption were much higher than for bioaccumulation. The better method to enrich the biomass turned out to be biosorption, which additionally could be performed for considerably higher initial concentration of microelement ions than bioaccumulation.
3

Bioavailability and bioaccumulation of hydrophobic organic pollutants. Part I. General remarks

72%
Oleszczuk P.
Biotechnologia
|
2007
|
issue 1
9-25
EN
Contaminants entering the soil environment as by-products of industrial or technological processes undergo various transformations. Some easily undergo degradation, volatilization or leaching, some are accumulated in the living organisms, while others get strongly bound to soil components through sorption, sequestration or bound-residue formation. In literature, it has been proved that the above mentioned processes considerably limit the bioavailability of contaminants and hence the effectiveness of biodegradation is lowered. The present study is a review of the literature on the issue of bioavailability of persistent organic pollutants for microorganisms and soil invertebrates. The first part presents some definitions of bioavailability and bioaccumulation proposed by various authors. Factors influencing the process of biodegradation have also been described with special attention drawn to their relation to the processes of bioavailability.
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