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PLUMBOSOLVENCY REDUCTION BY HIGH PH AND LOW CARBONATE-SOLUBILITY RELATIONSHIPS
Citation:
Schock, M. AND M. Gardels. PLUMBOSOLVENCY REDUCTION BY HIGH PH AND LOW CARBONATE-SOLUBILITY RELATIONSHIPS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-82/136 (NTIS PB85165876).
Description:
Experiments were conducted to study the effect of a pH > or = 9.0 and a low total inorganic carbonate (TIC) concentration of 10 to 80 mg as CaCO3/L on lead solubility. The results were compared with those of earlier experiments in which the pH was 8.0 to 8.5. In the experiments that had pH's > or = 9.0, lead leaching was reduced, as was consumption of both residual free chlorine and dissolved oxygen. The results closely followed the predictions of a solubility model that allowed for aqueous lead complexation and control by the solid basic lead carbonate under the experimental pH and TIC conditions.