صبا اعظمي

Contamination of water resources with synthetic dyes, heavy metals an‎d other industrial pollutants is one of the most important environmental an‎d health challenges worldwide. These pollutants pose a serious threat to aquatic ecosystems an‎d human health due to their chemical stability, high solubility an‎d resistance to natural degradation. Traditional wastewater treatment methods face limitations such as low efficiency in removing low-level pollutants, production of chemical sludge an‎d high costs, therefore, the use of biocompatible an‎d high-performance adsorbents along with modern methods for producing regular structures has been considered. The 3D printing method, with its ability to produce structures with specific geometry, controllable porosity an‎d increased active surface area, allows the design of optimal adsorbents. In this thesis, a thermoplastic polyurethane polymer adsorbent with a funnel-like structure was designed by 3D printing an‎d activated with sodium hydroxide to activate the adsorbent surface an‎d optimize contact with the solution. Reactive Orange 16 was selec‎ted as the modern molecule an‎d its removal efficiency was investigated by solid phase extraction with a 3D printed funnel-like adsorbent. The parameters affecting the adsorption included solution pH, contact time, initial dye concentration, solution volume, an‎d adsorbent density. The optimal conditions included pH = 2, contact time = 20 minutes, solution volume = 10 ml, initial dye concentration = 20 ppm, an‎d adsorbent density = 60 percent, an‎d under these conditions the removal efficiency reached 97 percent. To investigate the removal of RO16 dye in a real sample of pharmaceutical production line wash water, the sample was first pre-treated with a cellulose filter an‎d then processed by a 3D printed funnel-like adsorbent. The dye removal efficiency decreased from 97% in laboratory conditions to 84.5% in the real sample, indicating the appropriate efficiency of the adsorbent an‎d the importance of pretreatment in real conditions.

پرينت سه‌بعدي، پليمر پلي اورتان ترموپلاستيك، ري اكتيو اورنج 16، استخراج فاز جامد

3D printing, thermoplastic polyurethane polymer, Reactive Orange 16, solid phase extraction

Saba Aazami

Dr. Afsaneh Mollahosseini