Abstract
This study examined adsorption of anionic dye on four zeolitic materials incorporated (VS-1, CuZSM-5) and not incorporated into metals (S-1, ZSM-5). The adsorption of the bromothymol blue (BTB) dye on the four adsorbents was analysed using isotherm models Langmuir, Freundlich, and Temkin. Two kinetic models were also applied to study the adsorption process, pseudo-first order and pseudo-second order. The isothermal data showed good correlation. The kinetics of adsorption were better described by the pseudo-second order model. The results obtained indicate that the maximum percentage removal of the BTB dye was given by a purely non-incorporated silicic zeolite (S-1).
Highlights
The environment is an integral part of the development strategies designed and implemented in every country in the world
All the kinetic parameters determined from these lines are presented in Table 2 on the zeolites S-1, ZSM-5, VS-1, and CuZSM-5, respectively
The results showed that the pseudo-second-order model was more reliable for determining the order of the adsorption kinetics of bromothymol blue (BTB) on the S-1, ZSM-5, VS-1, and CuZSM-5 zeolites, because the correlation coefficients were closer to one (R2 > 0.99) compared to those of the pseudo-first-order model
Summary
The environment is an integral part of the development strategies designed and implemented in every country in the world. The industrial developments of recent years have left their negative impressions the environment Such industries include the manufacture of dyes, textile, printing, paper, leather, cosmetics, and many others that use dyes and dyeing processes to produce their finished products.[1] The dyes used in the textile industry are classified into three classes: anionic (which include direct dyes, acid and reactive), cationic which include all basic dyes, and non-ionic which include dispersed dyes.[2] Dyes have a synthetic origin and complex aromatic molecular structure, which makes them more stable and more difficult for biodegradation and photodegradation.[3,4] There are several techniques that are used to remove dyes, adsorption is the most effective method due to its simplicity, high yield, easy recovery, and reuse of the adsorbent.[5] The dye used in this study was a triphenylmethane dye bromothymol blue (BTB), which belongs to the family of anionic dyes.
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