Este trabalho foi realizado para testar membranas puras de dois zeólitos 13X e 5A (peneira molecular), como adsorventes efetivos para remoção de corante catiônico, laranja de acridina (AO), a partir de solução aquosa. As membranas foram realizadas por método rápido e fácil sem reagentes adicionais, a membrana pura realizada com 5A chamamos de m-5A e membrana pura realizada com 13X, chamamos m-13X. A adsorção de AO foi estudada em um sistema de lote em conjunto com análises UV-visíveis para determinar a eficiência de m-13X e m-5A, onde ambas as membranas puras apresentaram bons resultados. A influência do tempo de contato na quantidade de corante adsorvido em membranas puras foi investigada, mostra alta redução nas primeiras horas de contato. A eficiência de adsorção é maior usando m-13X, às 18h, atinge 85%, enquanto que para m-5A atinge 55%. O mecanismo de adsorção foi analisado por modelos cinéticos: Pseudo primeira ordem e Pseudo de segunda ordem, e os dados experimentais mostram que um bom acordo com o modelo de segunda ordem obteve uma quantidade adsorvida de 1,73 e 2,36 mg / g para m-5A e m-13X, respectivamente. Este estudo mostra que o m-13X é um adsorvente mais eficaz que o adsorvente m-5A para remoção de AO de soluções aquosas.
This work has been performed to test pure membranes of two zeolites 13X and 5A (molecular sieve), as effective adsorbents for the removal of cationic dye, acridine orange (AO), from aqueous solution. The membranes were performed by fast and easy method without additional reagents, the pure membrane performed with 5A we called m-5A and pure membrane performed with 13X we called m-13X. Adsorption of AO was studied in a batch system in conjunction with UV-visible analyses to determinate de efficiency of m-13X and m-5A, where both pure membranes exhibited good results. The influence of contact time on the amount of dye adsorbed onto pure membranes was investigated, it shows high reduction in the first hours of contact. The adsorption efficiency is higher using m-13X, at 18h achieve 85 %, while form-5A achieve 55 %. The mechanism of adsorption was analyzed by kinetics models: Pseudo first order and Pseudo second order, and experimental data shows a good agreement with second-order model obtained an adsorbed amount of 1.73 and 2.36 mg/g for m-5A and m-13X respectively. This study shows that m-13X is more effective adsorbent that m-5A adsorbent for removal of AO from aqueous solutions.
comparison of pure membranes of 13X and 5A zeolite for removal of acridine orange dye from aqueous solutions
Tavolaro Adalgisa;
2018
Abstract
This work has been performed to test pure membranes of two zeolites 13X and 5A (molecular sieve), as effective adsorbents for the removal of cationic dye, acridine orange (AO), from aqueous solution. The membranes were performed by fast and easy method without additional reagents, the pure membrane performed with 5A we called m-5A and pure membrane performed with 13X we called m-13X. Adsorption of AO was studied in a batch system in conjunction with UV-visible analyses to determinate de efficiency of m-13X and m-5A, where both pure membranes exhibited good results. The influence of contact time on the amount of dye adsorbed onto pure membranes was investigated, it shows high reduction in the first hours of contact. The adsorption efficiency is higher using m-13X, at 18h achieve 85 %, while form-5A achieve 55 %. The mechanism of adsorption was analyzed by kinetics models: Pseudo first order and Pseudo second order, and experimental data shows a good agreement with second-order model obtained an adsorbed amount of 1.73 and 2.36 mg/g for m-5A and m-13X respectively. This study shows that m-13X is more effective adsorbent that m-5A adsorbent for removal of AO from aqueous solutions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.