Sequential Extraction of Chromium from Galvanic Wastewater Sludge
A. Bielicka, I. Bojanowska*, A. Wiśniewski
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Department of Environmental Engineering, Faculty of Chemistry, University of Gdańsk,
18 J. Sobieskiego St., 80 - 852 Gdańsk, Poland
Pol. J. Environ. Stud. 2005;14(2):145-148
The sequential extraction of chromium from galvanic wastewater sludge was studied. A five-step se-quential fractionation scheme was used to partition the chromium into exchangeable (F I), acid-soluble (F II), reducible (F III), organic matter (F IV) and residual (F V) fractions. The results of investigations indicate that 59.5% of chromium occurred in residual fraction, which is permanently immobilized, whereas 40.5% of chromium in galvanic wastewater sludge can be released to ecosystems under changing natural conditions.
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