Journal
MARINE POLLUTION BULLETIN
Volume 74, Issue 1, Pages 213-219Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2013.06.055
Keywords
Thorium(IV) removal; Fungus Fussarium sp #ZZF51; Biosorption; Citric acid; Isotherms; Kinetics
Funding
- Natural Science Foundation of China [20072058]
- Science and Technology Development Project of Hunan [2010FJ3014]
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Thorium(IV) biosorption is investigated by citric acid treated mangrove endophytic fungus Fussarium sp. #zzF51 (CA-ZZE51) 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. (C) 2013 Elsevier Ltd. All rights reserved.
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