Activated Carbon Adsorption of Nickel

Goyal et determined the adsorption isotherms of Ni(II) ions from aque- 

The presence of acidic groups on the carbon surface (postulated as carboxyls and lactones) and their ionization in water changes the pH of the carbon suspension. The pH of as-received ACF-307 and GAC-E samples were 7 and 10 respectively. The pH of these carbons was reduced to between 3 and 4 on oxidation with nitric 

FIGURE 6.34 Adsorption isotherms of Ni(II) ions on ACF-307 before and after oxidation. (Source Goyal, M., Rattan, V.K., and Bansal, R.C., Indian J. Chem. Technol., 6, 305, 1999. With permission.) 

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