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The influence of phosphate and sulfate on the sorption of cadmium on calcite was studied in laboratory experiments atI = 0.7, pH 7.4-9.5 and P CO2 = 10 -3.5 atm. The fast initial sorption of cadmium decreased with increasing phosphate and sulfate concentrations. Since total phosphate and total sulfate sorption increase with decreasing pH, due to lower carbonate...
Experiments were performed to investigate the transformation of natural powdered aragonite to Mn x Ca (1-x) CO 3 (rhodochrosite-calcite) solid-solutions by the reaction with aqueous (Ca,Mn)-chloride solutions, at 20°C and 1-atm total pressure, for periods up to 37 months. Results indicate that the transformation of aragonite to mixed rhombohedral carbonates...
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