Abstract
Parabens are a family of p-hydroxybenzoic acid esters used as preservatives in food, cosmetics, and pharmaceuticals products, parabens are pollutants that have been detected in the environment at low concentrations. Recent research describes that parabens can cause health alterations. Alternatives for contaminant removal include the adsorption process, which can use materials that are abundant, inexpensive and susceptible to modifications. In this sense, biochar can be an option for obtaining materials that can be used for pollutants removal. In this report, we present the use of biochar derived from fique bagasse as an adsorbent for the removal of butylparaben (BP) from water. This paper examines how pH variations influence the adsorption capacity of butylparaben onto fique bagasse biochar, it was determined that the highest adsorption capacity occurred at pH 6. Furthermore, pseudo-first order, pseudo-second order, Weber and Morris, and Boyd models were used to study the adsorption kinetics. As a result, the pseudo-first order model was favorable for six carbonaceous materials studied. Finally, Freundlich, Langmuir, and Sips adsorption isotherm models were investigated; the Langmuir model was the best for adsorption isotherm data. The maximum adsorption capacity of BP for FB-3Na was 20.9520 mg g(-1).