A recent study on remediation of direct blue 15 dye using halloysite nanotubes

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

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4 Citations (Scopus)


A set of lab‐scale experiments were designed and conducted to remedy Direct Blue 15 (DB15) dye using nontoxic halloysite nanotubes (HNT) with the view to be utilized in a textile industrial effluent (TIE). The DB15 adsorbed‐HNT “sludge” was used as a reinforcing agent and plas-tic waste to fabricate the composite. To advance the knowledge and further understand the chemical phenomena associated with DB15 adsorption on HNT, different factors like pH value, adsorbate initial concentration, adsorbent dosage, and temperature on the composite were affected experi-mentally tested. To estimate the adsorption capacity of HNT, nine isotherm models were applied, and it was identified that the Brouers–Sotolongo adsorption isotherm model represented the best accuracy for predicting the adsorption behavior of the HNT. Likewise, the pseudo‐second‐order reaction was the predominant mechanism for the overall rate of the multi‐step dye adsorption pro-cess. Additionally, it was demonstrated that the mass transfer during the process is diffusion‐con-trolled, and thermodynamic assessments showed that the process is physisorption.

Original languageEnglish
Article number8196
Number of pages23
JournalApplied Sciences (Switzerland)
Issue number17
Publication statusPublished - Sep 2021


  • Adsorption isotherm model
  • Diffusive mass transfer
  • Direct Blue 15
  • Halloysite nanotubes
  • Remediation


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