Research Article

Effect and Removal Mechanisms of 6 Different Washing Agents for Building Wastes Containing Chromium

Table 2

Physicochemical properties of the sample after water washing.

pHw (total Cr)/(mg/kg)w [Cr (VI)]/(mg/kg)w (Cr)/(mg/kg)
SolubleAcid solubleReducibleOxidizableResidual

1 1 . 7 4 ± 0 . 0 4 1 6 6 2 . 2 5 ± 6 5 . 4 5 1 4 3 1 . 4 0 ± 4 1 . 2 9 1 0 7 2 . 8 5 ± 5 4 . 6 5 3 4 7 . 2 5 ± 1 1 . 2 6 1 8 7 . 2 4 ± 4 . 5 6 1 5 6 . 6 8 ± 8 . 6 9 3 4 . 0 1 ± 5 . 9 3