title: Thorium(IV) removal from aqueous medium by citric acid treated mangrove endophytic fungus Fusarium sp. #ZZF51.
abstract: 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 90 min, initial thorium(IV) concentration 50 mg L(-1) and adsorbent dose 0.6 g L(-1) with 90.87% of removal efficiency and 75.47 mg g(-1) of adsorption capacity, which is obviously greater than that (11.35 mg g(-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.
authors.affiliation: School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China. Electronic address: nhyangsk@163.com.
authors.forename: S K
authors.initials: SK
authors.lastname: Yang
authors.forename: N
authors.initials: N
authors.lastname: Tan
authors.forename: X M
authors.initials: XM
authors.lastname: Yan
authors.forename: F
authors.initials: F
authors.lastname: Chen
authors.forename: W
authors.initials: W
authors.lastname: Long
authors.forename: Y C
authors.initials: YC
authors.lastname: Lin
mesh_terms: D000327:Adsorption; D001673:Biodegradation, Environmental; D002681:China; D019343:Citric Acid / Q000378:metabolism; D005670:Fusarium / Q000502:physiology*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D017550:Spectroscopy, Fourier Transform Infrared; D013910:Thorium / Q000032:analysis / Q000378:metabolism*; D014875:Water Pollutants, Radioactive / Q000032:analysis / Q000378:metabolism*; D053833:Wetlands
chemical_list: D014875:Water Pollutants, Radioactive; D019343:Citric Acid; D013910:Thorium
keywords: Biosorption; Citric acid; Fungus Fussarium sp. #ZZF51; Isotherms; Kinetics; Thorium(IV) removal