Equilibrium, kinetic and thermodynamic studies of acid Orange 52 dye biosorption by Paulownia tomentosa Steud. leaf powder as a low-cost natural biosorbent.
Equilibrium, kinetic and thermodynamic studies of acid Orange 52 dye biosorption by Paulownia tomentosa Steud. leaf powder as a low-cost natural biosorbent.
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DOI：
10.1016/j.biortech.2010.02.004
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发表时间：
2010-07
影响因子：
11.4
通讯作者：
F. Deniz;S. Saygideger
中科院分区：
文献类型：
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作者：
F. Deniz;S. Saygideger
泡桐叶粉对酸橙52的生物吸附研究。在间歇吸附系统中研究了平衡、动力学和热力学参数与溶液pH、生物吸附剂浓度、染料浓度、生物吸附剂粒径、温度和接触时间的关系。采用Langmuir、Freundlich和Temkin等温线模型模拟生物吸附平衡。Temkin和Langmuir等温线可以很好地解释实验平衡数据，最大吸附量为10.5mgg−1。为了描述吸附动力学，研究了拟一阶、拟二阶、Elovich和颗粒内扩散动力学模型的拟合。结果表明，吸附过程符合准二级速率动力学。热力学研究表明，该体系为放热过程。结果表明，毛毛树叶粉是一种有效的生物吸附剂，可用于处理酸性橙52废水。
The biosorption of Acid Orange 52 onto the leaf powder of Paulownia tomentosa Steud. was studied in a batch adsorption system to estimate the equilibrium, kinetic and thermodynamic parameters as a function of solution pH, biosorbent concentration, dye concentration, biosorbent size, temperature and contact time. The Langmuir, Freundlich and Temkin isotherm models were used for modeling the biosorption equilibrium. The experimental equilibrium data could be well interpreted by the Temkin and Langmuir isotherms with maximum adsorption capacity of 10.5mgg−1. In order to state the sorption kinetics, the fits of pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion kinetic models were investigated. It was obtained that the biosorption process followed the pseudo-second order rate kinetics. Thermodynamic studies indicated that this system was exothermic process. The results revealed that P. tomentosa leaf powder could be an efficient biosorbent for the treatment of wastewater containing Acid Orange 52.