Abstract
Chitosan microspheres were used to remove emerging pollutants such as: oxycam anti-inflammatories, piroxycam, meloxycam and tenoxycam from water. Adsorption studies were adjusted in accordance to the Langmuir equation. The maximum number of adsorbed moles yielded 1.27, 0.99 and 1.18 mmol of piroxycam, meloxycam and tenoxycam, respectively, per gram of chitosan microspheres. Thermodynamic data at the solid/liquid interface displayed that the interactions not only were spontaneous, but were enthalpically favored and entropically disfavored. This interaction was studied via FTIR spectroscopy, and data obtained suggested that oxycam must have interacted with chitosan by an interaction between the hydrogen of NH2.
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