Um novo superadsorbent -cyclodextrina reticulada biopolímero de biopolímero para remover moléculas orgânicas de matrizes de água

Herein, a new superadsorbent was synthesized via a crosslinking reaction using -cyclodextrin and coffee grounds and employed to remove two organic cationic molecules, methylene blue and crystal violet. The interactions between adsorbent-adsorbate in aqueous media were also investigated. The material was characterized by FTIR, XRD, As técnicas SEM, EDX e DSC, e a adsorção foram investigadas através dos parâmetros cinéticos, isotermas e termodinâmicos . SIPS isoterm foi o modelo mais adequado para ajustar os dados de adsorção, enquanto o modelo de adsorção {{{pseudo-fir-fir-firm-order {{a fita) values, higher than 1500 mg g−1. This high adsorption capacity results from three main mechanisms: electrostatic attraction, hydrogen bonds, and hydrophobic interactions between the hydrophobic parts of dyes and the inner hydrophobic cavity of cyclodextrin. Thermodynamic parameters revealed an endothermic and spontaneous process with increased randomness in the liquid-solid Interface . No geral, o adsorvente exibiu um excelente desempenho para remoção de corante e uso potencial em estações de tratamento de águas residuais .