نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده مهندسی شیمی، دانشگاه تهران، صندوق پستی: 4563-11155 ،تهران ـ ایران
2 پژوهشکده چرخه سوخت هستهای، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
This research examined how Cystoseria indica brown macroalgae of the Phaophyta family can be pre-treated with calcium to sorb Th(IV), V(V), and Fe(III) from real wastewater resulting from the thorium chemical process using a fixed bed column whose bed height was 5.25 cm and diameter was 1.5 cm. It was found that the competition between Th(IV) and V(V) ions is significant in Th(IV) biosorption from three-component feed solutions of Th(IV) - V(V) and Th(IV) - Fe(III). The biosorption capacity of Th(IV), V(V), and Fe(III) from real wastewater was also 104.60, 24.15, and 17.39 mg/g, respectively. It shows that Th(V) ions have higher affinity to Ca-pretreated Cystoseria indica algae than Fe() and V(V) ions. The biosorption breakthrough curves were modeled using Bohart-Adams, Thomas, Yoon-Nelson, Belter, adapted dose-response, Gompertz, and modified Gompertz models. The results showed that the modified Gompertz model better agreed with the experimental data. The Fourier transform infrared (FTIR) analysis and calcium concentration determination in real wastewater indicated that functional groups such as hydroxyl, amine, amide, methylene, carboxyl, and sulfate were most likely to participate in the ion exchange mechanism with Th(*V), V (V) and Fe(III) ions.
کلیدواژهها English
Firouz Zarea M, Jalali R. Biosorption of uranium from aqueous solutions by nonliving biomass of marinealgae Cystoseira indica. Electronic Journal of Biotechnology. 2006;9(2): 0-0.