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.
ASJC Scopus subject areas
- Environmental Chemistry
- Waste Management and Disposal