About Us | Help Videos | Contact Us | Subscriptions



This article in SSSAJ

  1. Vol. 43 No. 4, p. 693-698
    Received: Dec 14, 1978
    Accepted: Mar 5, 1979

Request Permissions


Chemisorption and Precipitation of Mn2+ at CaCO3 Surfaces1

  1. M. B. McBride2



The adsorption of Mn2+ on two samples of powdered calcite with different surface areas has been studied using atomic absorption and electron spin resonance spectroscopy to investigate the solution and mineral phases. Chemisorption of Mn2+ on CaCO3 surfaces lowered the solubility of Mn2+ below the level expected for MnCO3 precipitation. At high levels of Mn2+ in solution, after saturation of surface sites, nucleation at CaCO3 surfaces seemed to occur, followed by slow precipitation of separate phase MnCO3. The preference of calcite for Mn2+ relative to Ca2+ decreased with increasing Mn2+ absorption. The results indicate the importance of the surface area of the solid phase in determining the quantity of Mn2+ adsorbed and the final solution concentration.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America