Effect of adsorbents on the leachability of cement bonded electroplating wastes

TY - JOUR

T1 - Effect of adsorbents on the leachability of cement bonded electroplating wastes

AU - Tamás, F. D.

AU - Csetényi, L.

AU - Tritthart, J.

PY - 1992

Y1 - 1992

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0026834804

U2 - 10.1016/0008-8846(92)90082-7

DO - 10.1016/0008-8846(92)90082-7

M3 - Article

AN - SCOPUS:0026834804

SN - 0008-8846

VL - 22

SP - 399

EP - 404

JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 2-3

ER -