International Journal of Nano Dimension (Int. J. Nano Dimens.) Adsorption study of Zinc ion onto halloysite nanotubes using taguchi’s design of experimental methodology Volume 9 (2018) Issue 3, August 2018 2024 02 28 Adsorption study of Zinc ion onto halloysite nanotubes using taguchi’s design of experimental methodology EN Gholamreza Kiani School of Engineering-Emerging Technologies, University of Tabriz, Tabriz, Iran. Mehdi Soltanzadeh School of Engineering-Emerging Technologies, University of Tabriz, Tabriz, Iran. Iraj Ahadzadeh Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran. Journal Article 2024 02 28 In this paper, Taguchi method was applied to determine the optimum conditions for Zn (II) removal from aqueous solution by halloysite nanotubes (HNTs). An orthogonal array experimental design (L16 (45) which is of five control factors including pH, t (contact time), m (adsorbent mass), T (temperature) and C0 (initial concentration of Zn (II)) having four levels was employed. Adsorption capacity (mg/g) and removal percent (%) were investigated as the quality characteristics to be optimized. In order to determine the optimum levels of the control factors precisely, range analysis and analysis of variance were performed. For removal percent, the optimum condition was found to be pH=6, T=35°C, w=0.4 g, and C0=50 mg/L. Under these optimum conditions, adsorption capacity and removal percent can reach to 132.16 mg/g and 99.76%, respectively.