用柠檬酸处理的红树林内生真菌 Fusarium sp. #ZZF51 从水介质中去除钍(IV)。
Thorium(IV) removal from aqueous medium by citric acid treated mangrove endophytic fungus Fusarium sp. #ZZF51.
机构信息
School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China.
出版信息
Mar Pollut Bull. 2013 Sep 15;74(1):213-9. doi: 10.1016/j.marpolbul.2013.06.055. Epub 2013 Jul 18.
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.
采用南海红树林内生真菌 Fussarium sp. #ZZF51（CA-ZZF51）经柠檬酸处理后对四价钍进行生物吸附研究。在优化条件下（pH 4.5、平衡时间 90 min、初始四价钍浓度 50 mg L(-1)和吸附剂用量 0.6 g L(-1)），吸附过程的去除效率为 90.87%，吸附容量为 75.47 mg g(-1)，明显高于未经处理的真菌 Fussarium sp. #ZZF51 在优化条件下对四价钍的吸附（11.35 mg g(-1)）。通过等温线和动力学模型对实验数据进行分析。动力学数据符合准二级模型，平衡数据与朗缪尔模型非常吻合。此外，FTIR 分析表明，羟基、氨基和羰基基团在吸附过程中起重要作用。
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