Characterization of biosorption process of As III on green algae Ulothrix cylindricum
Yazarlar (6)
Prof. Dr. Mustafa TÜZEN
Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Karadeniz Teknik Üniversitesi, Türkiye
Prof. Dr. Durali MENDİL
Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Doç. Dr. Özgür Doğan ULUÖZLÜ
Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Erciyes Üniversitesi, Türkiye
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale |
| Dergi Adı | Journal of Hazardous Materials |
| Dergi ISSN | 0304-3894 Wos Dergi Scopus Dergi |
| Dergi Tarandığı Indeksler | SCI-Expanded |
| Dergi Grubu | Q4 |
| Makale Dili | İngilizce |
| Basım Tarihi | 06-2009 |
| Cilt No | 165 |
| Sayı | 1 |
| Sayfalar | 566 / 572 |
| DOI Numarası | 10.1016/j.jhazmat.2008.10.020 |
| Makale Linki | http://linkinghub.elsevier.com/retrieve/pii/S0304389408015100 |
| Özet |
| Arsenic (As) is generally found as As(III) and As(V) in environmental samples. Toxicity of As(III) is higher than As(V). This paper presents the characteristics of As(III) biosorption from aqueous solution using the green algae (Ulothrix cylindricum) biomass as a function of pH, biomass dosage, contact time, and temperature. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models were applied to describe the biosorption isotherm of As(III) by U. cylindricum biomass. The biosorption capacity of U. cylindricum biomass was found as 67.2mg/g. The metal ions were desorbed from U. cylindricum using 1M HCl. The high stability of U. cylindricum permitted 10 times of adsorption-elution process along the studies with a slightly decrease about 16% in recovery of As(III) ions. The mean free energy value evaluated from the D-R model indicated that the biosorption of As(III) onto U. cylindricum biomass was taken place by chemical ion-exchange. The calculated thermodynamic parameters, DeltaG degrees , DeltaH degrees and DeltaS degrees showed that the biosorption of As(III) onto U. cylindricum biomass was feasible, spontaneous and exothermic under examined conditions. Experimental data were also tested in terms of biosorption kinetics using pseudo-first-order and pseudo-second-order kinetic models. The results showed that the biosorption processes of As(III) followed well pseudo-second-order kinetics. |
| Anahtar Kelimeler |
| U. Cylindricum | Green algae | Biosorption | As(III) |