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

Figure 10

Removal effect of oxidizable Cr by different washing agents. Washing agent: 1—water; 2—0.05 mol/L EDTA-Na₂; 3—0.1 mol/L EDTA-Na₂; 4—0.1 mol/L citric acid; 5—0.5 mol/L citric acid; 6—0.1 mol/L oxalic acid; 7—0.5 mol/L oxalic acid; 8—0.1 mol/L HCl; 9—0.5 mol/L HCl; 10—1 mol/L HCl; 11—0.1 mol/L acetic acid; 12—0.5 mol/L acetic acid.

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