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Removal of carbamazepine from aqueous solution by adsorption on fly ash-amended soil
Carbamazepine (CBZ), nonbiodegradable pharmaceutical residue, has become an emerging pollutant in several aquatic environments. The effectiveness of the mixture of soil and fly ash (FA) in adsorbing CBZ from aqueous solution has been studied as well as agitation time, FA content, initial CBZ concentration and desorption as a function of FA content. The adsorption kinetics fits a hyperbolic or pseudo-second-order model. The maximum adsorbed amounts for natural soil and a mixture of soil/FA ranged from 77 to 158 mg kg−1. Rate constants were considered relatively low (4.15–15.59 × 10−4 kg mg−1 min). The logarithmic form of the Freundlich equation gave a linearity and the
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