Thorium(IV) removal from aqueous medium by citric acid treated mangrove endophytic fungus Fusarium sp. #ZZF51

• Published in: Marine pollution bulletin 2013-09, Vol.74 (1), p.213-219
• Main Authors: Yang, S.K., Tan, N., Yan, X.M., Chen, F., Long, W., Lin, Y.C.
• Format: Article
• Language: English
• Subjects: Adsorbents; Adsorption; Animal and plant ecology; Animal, plant and microbial ecology; Applied ecology; Biodegradation, Environmental; Biological and medical sciences; Biosorption; Brackish water ecosystems; China; Citric acid; Citric Acid - metabolism; Ecotoxicology, biological effects of pollution; endophytes; Fourier transform infrared spectroscopy; Fundamental and applied biological sciences. Psychology; Fungi; Fungus Fussarium sp. #ZZF51; Fusarium; Fusarium - physiology; Hydrogen-Ion Concentration; Isotherms; Kinetics; Marine; Marine and brackish environment; Optimization; Pollution abatement; Sea water ecosystems; sorption isotherms; Spectroscopy, Fourier Transform Infrared; Synecology; thorium; Thorium - analysis; Thorium - metabolism; Thorium(IV) removal; Water Pollutants, Radioactive - analysis; Water Pollutants, Radioactive - metabolism; water pollution; Wetlands
• ISSN: 0025-326X; 1879-3363
• DOI: 10.1016/j.marpolbul.2013.06.055

•The mangrove endophytic fungus. They own special species and metabolic approaches.•Chemical treatment with citric acid. Improving the cation exchange capacity.•Explain adsorption mechanism combined with FTIR spectroscopy and kinetic models. Thorium(IV) biosorption is investigated by citric acid treated mangrove endophytic fungus Fussarium sp. #ZZF51 (CA-ZZF51) from South China Sea. The biosorption process was optimized at pH 4.5, equilibrium time 90min, initial thorium(IV) concentration 50mgL−1 and adsorbent dose 0.6gL−1 with 90.87% of removal efficiency and 75.47mgg−1 of adsorption capacity, which is obviously greater than that (11.35mgg−1) of the untreated fungus Fussarium sp. #ZZF51 for thorium(IV) biosorption under the condition of optimization. The experimental data are analyzed by using isotherm and kinetic models. Kinetic data follow the pseudo-second-order model and equilibrium data agree very well with the Langmuir model. In addition, FTIR analysis indicates that hydroxyl, amino, and carbonyl groups act as the important roles in the adsorption process.