Shadpour Mallakpour - Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology,Isfahan ۸۴۱۵۶-۸۳۱۱۱, Islamic Republic of Iran- Research Institute for Nanotechnology and Advanced Materials, Isfahan University of Technology, Isfahan
Amir Abdolmaleki - Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology,Isfahan ۸۴۱۵۶-۸۳۱۱۱, Islamic Republic of Iran- Research Institute for Nanotechnology and Advanced Materials, Isfahan University of Technology, Isfahan
Farbod Tabesh - Chemistry group, Pardis College, Isfahan University of Technology, Isfahan ۸۴۱۵۶-۸۳۱۱۱, Islamic Republic of Iran

Due to the increasing growth rate of the population, the attention has been centered around thewater remediation. Thus, several methods are used in this regard which the adsorption processhas been found to be the most favorite manner [1]. Hydrogels have met the expectations in theadsorption, hence, preparation of an appropriate hydrogel nanocomposite (HNC) was aimedusing natural materials, tragacanth gum (TG) and calcite nanoparticles (CC NPs). CC NPswere modified using ethylenediaminetetraacetic acid (EDTA). Preparation of HNC(TG/CC@EDTA HNC) was carried out through the previous work [2]. Characterization andproperties of the obtained HNC were done using several techniques. The HNC was used as anadsorbent of methylene blue dye (MBD). Results indicated that for either of isotherm and kineticmodels, linear approaches are more accurate. Based on the linear equations, Langmuirand pseudo-first-order were suitable models for the adsorption which suggest monolayer andphysical adsorption, respectively. The maximum adsorption capacity was found to be 469mg/g. Thermodynamic calculations proved an endothermic and spontaneous process alongwith physiochemical adsorption. Fig. 1 shows possible interactions between MBD andTG/CC@EDTA HNC.