Pedosphere 8(2): 169--174, 1998
ISSN 1002-0160/CN 32-1315/P
©1998 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Magnesium (Ⅱ) adsorption from aqueous solutions on China Clay and the stability constants for complex formation |
| S. BEGUM and F. U. KHAN |
| Pakistan Council of Scientific, Industrial Research Labs, Peshawar (Pakistan) |
| ABSTRACT |
| China clay was employed as an adsorbent for the removal of Mg2+ from water at pH 7.0 within the temperature range of 303~328 K. The linearity of the plots indicated Langmuir-type isotherms. The reaction was exothermic. A maximum removal of 35% was obtained at 0.50 mmol L-1 metal concentration and a pH of 7.0 at 303 K. The Hrel+/Mgads2+ ratio changed from a fractional value to 2.5. Strong chemical bondings took place between oxygen atom of the surface and Mg2+, resulting in a surface com plex species. Tem perature had a significant effect on Hrel+, and the stability constants also increased with increasing temperature. |
| Key Words: Hrel+ easing, Mg2+ adsorption, stability constants, temperature |
| Citation: Begum, S. and Khan, F. U. 1998. Magnesium (Ⅱ) adsorption from aqueous solutions on China Clay and the stability constants for complex formation. Pedosphere. 8(2): 169-174. |
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