Relative Metal Ion Sorption on Natural and Engineered Sorbents: Batch and Column Studies

Tillman Jr., Fred D.; Bartelt-Hunt, Shannon L.; Craver, Vinka A.; Smith, James A.; Alther, George R.
May 2005
Environmental Engineering Science;May2005, Vol. 22 Issue 3, p400
Academic Journal
The sorptive capacity of four sorbent materials (hydroxy-apatite, clinoptilolite, an organoclay, and an organoclay/anthracite blend) was determined for five metals: Cd, Cr, Cu, Ni, and Zn, by performing column and batch sorption isotherm tests. Hydroxy-apatite exhibited the largest sorption capacity for all materials tested, followed by clinoptilolite, the organoclay, and the organoclay/anthracite blend. In general, the increase in sorptive capacity for all materials was related to an increase in measured surface area. Although the organoclay and organoclay/anthracite blend had a lower sorptive capacity than the other materials tested, they show promise as sorbents for mixed effluent streams consisting of both organic contaminants and low levels of heavy metals.


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