Equilibrium and kinetics of biosorption of oxalic acid by wheat straw
Equilibrium and kinetics of biosorption of oxalic acid by wheat straw
复制标题
麦秆生物吸附草酸的平衡与动力学
DOI：
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发表时间：
2017
影响因子：
1.4
通讯作者：
N. Samadani Langeroodi
中科院分区：
文献类型：
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作者：
N. Samadani Langeroodi
研究了水溶液中草酸在小麦秸秆上的吸附平衡和动力学。在测试的模型（即Langmuir、Freundlich、Temkin和Dubininin-Radushkevich等温线）中，Freundlich模型最能描述生物吸附平衡。小麦秸秆对草酸的吸附符合二级动力学。麦草对草酸的平衡吸附量随草酸初始浓度的增加和吸附剂用量的减少而增加。另一方面，温度的升高降低了草酸的生物吸附。平均吸附自由能（10 kJ/mole）表明小麦秸秆对草酸的吸附可能遵循化学吸附机理。
Biosorption equilibrium and kinetics of oxalic acid on wheat straw, Triticum aestivum, in an aqueous solution was investigated. Among the models tested, namely the Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherms, the biosorption equilibrium was best described by Freundlich model. It was also found the biosorption of oxalic acid by wheat straw followed second-order kinetics. The equilibrium amount of oxalic acid adsorbed onto the wheat straw increased with increasing the initial oxalic acid concentration and decreasing adsorbent weight. On the other hand, an increase of temperature decreased the biosorption of oxalic acid. Mean free energy of biosorption (10 kJ/mole) indicates that biosorotion of oxalic acid by wheat straw might follow a chemisorptions mechanism.