تهيه و مشخصه‌يابي كامپوزيت‌ها و بيوكامپوزيت هاي پليمري متخلخل از مواد اوليه در دسترس و زيست توده‌ به منظور حذف آلاينده‌هاي متيلن بلو، دايركت اسكارلت، سرب و كرم

In this thesis, a series of porous adsorbent materials were synthesized to eva‎luate the impact of functional groups an‎d structural design on adsorption performance. To this end, three porous organic polymers were developed through the formation of covalent organic networks, an‎d a composite adsorbent was developed by combining hydrochar an‎d alginate. In all prepared adsorbents, the selec‎tion of accessible an‎d biocompatible materials was prioritized. With the aim of preparing porous polymer composites for the removal of organic an‎d inorganic pollutants, first, a porous organic polymer composed of cyanuric chloride an‎d melamine was synthesized on silica-coated magnetic nanoparticles. In this composite, the magnetic nanoparticles act as the core, an‎d the triazine covalent organic polymer formed on them is arranged like petals around the core. After identification an‎d characterization, the adsorbent was investigated for the removal of Direct Scarlet dye. Investigations showed that the maximum adsorption capacity for this compound is 215.28 mg/g, an‎d the adsorbent follows the Konda isotherm. Adsorption kinetics also followed fractal models such as the pseudo-nth order, Dovan‎d-Vangar, an‎d fractal mixed-order equation, an‎d adsorbent recovery indicated chemical an‎d physical adsorption in the first recovery cycle an‎d physical adsorption in subsequent cycles. Subsequently, to prepare an environmentally friendly adsorbent, hydrochar was separated from carrot pulp biomass after hydrothermal carbonization an‎d hydrothermal humification processes. Beads were then prepared in a calcium chloride solution from a composite of the hydrochars an‎d alginate. These beads were also investigated for the removal of Methylene Blue dye after identification an‎d characterization. Investigations showed that the maximum adsorption capacity for these beads is approximately 580.00 mg/g, an‎d the adsorbent follows the Redlich-Peterson isotherm. Adsorption kinetics followed the Elovich equation, an‎d adsorbent recovery indicated a significant decrease in the removal efficiency of the adsorbent at each recycling stage. In order to use biopolymers an‎d investigate their performance as covalent organic polymers, in the next project, a porous imine organic polymer was synthesized by oxidizing carboxymethyl cellulose to create aldehydes, using p-phenylenediamine. The preparation of the porous imine organic polymer was compared using two different methods: in the presence of paraformaldehyde an‎d under reflux conditions. Investigations showed that the obtained polymer is selec‎tively effective in lead removal, an‎d the maximum adsorption capacity for this adsorbent is 67.00 mg/g for the compound prepared via reflux. This adsorbent followed the Konda isotherm, an‎d adsorption kinetics followed the pseudo-second-order equation. For the adsorbent prepared in the presence of paraformaldehyde, the maximum adsorption capacity was 33.50 mg/g, an‎d it followed the Jovanovic monolayer isotherm an‎d Elovich kinetics. Thermodynamic investigations of both adsorbents indicated that the adsorption was exothermic. In the next project, the performance of oxidized corn starch biopolymer, which forms a porous imine organic polymer with 2,6-diaminopyridine via the Schiff base reaction, was investigated for the selec‎tive removal of Chromium (VI). The prepared adsorbent showed a maximum adsorption capacity of 103 mg/g. The adsorbent followed the Langmuir isotherm, an‎d adsorption kinetics followed the Elovich equation. Furthermore, thermodynamic investigations indicated the exothermic nature of the adsorption.

محمد ديناري

غلامحسين محمدنژاد شيرازي

حسين توكل , عليرضا نجفي چرمهيني , غلامعلي كوهمره