Temporal and spatial changes of cadmium in the near-bottom suspended matter of the Pomeranian Bay - Arkona Deep system

• Autorzy: Staniszewski A. , Pazdro K. , Beldowski J. , Leipe T. , Emeis K.C. , Pempkowiak J.
• Języki publikacji: EN

Abstrakty

EN

Owing to the high toxicity of cadmium (Cd) towards biota and the considerable quantities of this element entering the environment from anthropogenic sources, interest in its biogeochemistry is increasing. This is also true for the marine environment, which serves as a sink for both natural and anthropogenic Cd loads entering the hydrosphere and the atmosphere. The distribution of Cd in the coastal zone of the marine environment is governed primarily by the flux of the so-called fluffy layer suspended matter (FLSM), which spreads across the top of the sea floor as a several-centimetre-thick layer containing highly concentrated suspended matter. Both total contents and solid speciation of Cd was measured in FLSM collected in the Pomeranian Bay – Arkona Deep system (Western Baltic Proper) in the course of the three-year-long study. Seasonal changes in the total Cd content (0.5–1.8 μg g−1 dry matter) were attributed to the contribution of organic suspensions originating from algal blooms. The decreasing content of Cd in FLSM offshore is due to the input of Cd-rich suspended matter from the River Odra (Oder), and the decreasing organic matter content in FLSM with increasing depth. The contribution of labile fractions (adsorbed and bound to iron(III) hydroxides) was found to be from 50 to 75% of the total content. In view of the substantial mobility and bioavailability of the fractions, this is a highly alarming feature.

Słowa kluczowe

EN

coastal zone; marine environment; spatial change; Pomeranian Bay; toxicity; cadmium; solid speciation; near-bottom suspended matter; temporal change

• Wydawca: -
• Czasopismo: Oceanologia
• Rocznik: 2000
• Tom: 42
• Numer: 4
• Opis fizyczny: p.483-491,fig.,ref.

Twórcy

autor

Staniszewski A.

• Polish Academy of Sciences, Powstancow Warszawy 55, 81-712 Sopot, Poland

autor

Pazdro K.

autor

Beldowski J.

autor

Leipe T.

autor

Emeis K.C.

autor

Pempkowiak J.

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