Adsorption method for the remediation of brilliant green dye using halloysite nanotube: Isotherm, kinetic and modeling studies

Shareefraza J. Ukkund, Prasad Puthiyillam, Hashim M. Alshehri, Marjan Goodarzi, Syed Noeman Taqui, Ali E. Anqi, Mohammad Reza Safaei, Masood Ashraf Ali, Usman Taqui Syed, Rayees Afzal Mir, Ashraf Elfasakhany, Emad M. Eed, Md Irfanul Haque Siddiqui, Imran Mokashi, Manzoore Elahi M. Soudagar

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Abstract

The first-ever use of halloysite nanotube (HNT), a relatively low-cost nanomaterial abun-dantly available with minor toxicity for removing brilliant green dye from aqueous media, is re-ported. The factors affecting adsorption were studied by assessing the adsorption capacity, kinetics, and equilibrium thermodynamic properties. All the experiments were designed at a pH level of around 7. The Redlich-Peterson isotherm model fits best amongst the nine isotherm models studied. The kinetic studies data confirmed a pseudo model of the second order. Robotic investigations pro-pose a rate-controlling advance being overwhelmed by intraparticle dispersion. The adsorbent fea-tures were interpreted using infrared spectroscopy and electron microscopy. Process optimization was carried out using Response Surface Methodology (RSM) through a dual section Fractional Fac-torial Experimental Design to contemplate the impact of boundaries on the course of adsorption. The examination of fluctuation (ANOVA) was utilized to consider the joined impact of the boundaries. The possibilities of the use of dye adsorbing HNT (“sludge”) for the fabrication of the composites using plastic waste are suggested.

Original languageEnglish
Article number8088
Number of pages23
JournalApplied Sciences (Switzerland)
Volume11
Issue number17
DOIs
Publication statusPublished - Sep 2021

Keywords

  • Adsorption studies
  • Brilliant green
  • Halloysite nanotube
  • Kinetics
  • Modeling

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