Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Siirt Üniversitesi, Fen Bilimleri Enstitüsü, Türkiye
Tezin Onay Tarihi: 2022
Tezin Dili: Türkçe
Öğrenci: RAHİME AÇİN OK
Danışman: Sinan Kutluay
Özet:
Volatile organic compounds (VOCs) with volatility, toxicity and dispersal properties pose a serious threat to human health and the eco-environment. Many industrial processes produce VOC pollutants, which occur as multicomponent systems. Therefore, the investigation of competitive adsorption of VOCs is of practical and scientific importance. In this thesis, the adsorption behavior of toluene, ethylbenzene and xylene in the vapor phase targeted as VOCs by perlite-supported Fe3O4@SiO2@8-hydroxyquinoline-5-sulfonic acid (perlite-Fe3O4@SiO2@8-HQ-5-SA) developed as a new magnetic nano-adsorbent in both single and multicomponent systems was elucidated. To characterize the perlite-Fe3O4@SiO2@8-HQ-5-SA nano-adsorbent produced by the coprecipitation method, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR) and Brunauer–Emmett–Teller (BET) analysis techniques were used. The adsorption capacities of toluene, ethylbenzene and xylene were found to be 546, 662 and 710 mg/g, respectively, at an inlet concentration of 30 mg/L in the single-component system. In the two-component system, the adsorption capacity of toluene was decreased by 42% and 50% at inlet concentrations of 30 mg/L toluene + 15 mg/L ethylbenzene and 30 mg/L toluene + 15 mg/L xylene, respectively. Similarly, the adsorption capacity of ethylbenzene decreased by 27% and 46% at inlet concentrations of 30 mg/L ethylbenzene + 15 mg/L toluene and 30 mg/L ethylbenzene + 15 mg/L xylene, respectively, in the two-component system. In addition, the adsorption capacity of xylene decreased by 16% and 22% at inlet concentrations of 30 mg/L xylene + 15 mg/L toluene and 30 mg/L xylene + 15 mg/L ethylbenzene, respectively, in the two-component system. In the three-component system, the competitive adsorption capacities were found to be lower than in the single-component system. Reaction-based (pseudo-first-order and pseudo-second-order) and diffusion-based (intraparticle diffusion, Boyd film diffusion and mass transfer) kinetic models were used to evaluate the kinetic behavior in the adsorption process of toluene, ethylbenzene and xylene onto the perlite-Fe3O4@SiO2@8-HQ-5-SA nano-adsorbent. The perlite-Fe3O4@SiO2@8-HQ-5-SA nano-adsorbent exhibited reuse efficiencies of 88.91%, 88.07% and 87.16% for toluene, ethylbenzene and xylene, respectively. In addition, it was determined that the perlite-Fe3O4@SiO2@8-HQ-5-SA nano-adsorbent has a significant potential compared to other adsorbents reported in the literature. In light of these evaluations, perlite-Fe3O4@SiO2@8-HQ-5-SA, which exhibits high adsorption capacity and reuse efficiency, is suggested as a promising nano-adsorbent for the efficient removal of VOC pollutants. In addition, the findings obtained within the scope of this thesis are important evidence for a better understanding of the comparative and competitive adsorption behavior between different VOC pollutants in the vapor phase in relation to a particular adsorbent.