Effect of adsorbents on the leachability of cement bonded electroplating wastes

F. D. Tamás, L. Csetényi, J. Tritthart

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

This study is aimed at the determination of pore solution composition of hardened cement pastes prepared with the addition of chromium-, cadmium- and nickel-salts. Due to the high pH-value of the pore water of cement paste, cadmium and nickel were transformed into insoluble hydroxides and precipitated practically quantitatively. Chromium, added as Na2Cr2O7.2 H2O, which is soluble in a highly alkaline medium, was partly bound. It is not clear yet, whether chromium was adsorbed and/or incorporated in hydration products. The use of clinker instead of cement caused a more intensive bond. Adsorbents (silica fume, fly ash and activated carbon), with the exception of fly ash did not improve this bonding.

Original languageEnglish
Pages (from-to)399-404
Number of pages6
JournalCement and Concrete Research
Volume22
Issue number2-3
DOIs
Publication statusPublished - 1992

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