Kinetics and thermodynamics of basic dye sorption on phosphoric acid esterifying soybean hull with solid phase preparation technique.
Kinetics and thermodynamics of basic dye sorption on phosphoric acid esterifying soybean hull with solid phase preparation technique.
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DOI：
10.1016/j.biortech.2007.08.061
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发表时间：
2008-07
影响因子：
11.4
通讯作者：
Ren-min Gong;Jin Sun;Demin Zhang;Keding Zhong;G. Zhu
中科院分区：
文献类型：
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作者：
Ren-min Gong;Jin Sun;Demin Zhang;Keding Zhong;G. Zhu
本文报道了一种源自酯化大豆皮（ESH）的带有磷酸羟基的阳离子吸附剂的固相制备方法。使用间歇系统研究了两种碱性染料吖啶橙 (AO) 和孔雀石绿 (MG) 从水溶液到 ESH 的吸附动力学和热力学。染料吸附的等温数据遵循 Langmuir 模型比 Freundlich 模型更好。 ESH对AO和MG的最大吸附容量(Qm)分别为238.1mg/g和178.57mg/g。染料吸附过程可以用准二级动力学模型来描述。热力学研究表明染料吸附是自发且放热的。较低的温度有利于吸附过程。
In this paper, the solid phase preparation method of a cationic sorbent, which bears hydroxyl groups of phosphoric acid derived from esterified soybean hull (ESH), was reported. The sorption kinetics and thermodynamics of two basic dyes, acridine orange (AO) and malachite green (MG), from aqueous solution onto ESH were investigated with a batch system. The isothermal data of dye sorptions followed the Langmuir model better than the Freundlich model. The maximum sorption capacity (Qm) of ESH for AO and MG was 238.1mg/g and 178.57mg/g, respectively. The dye sorption processes could be described by the pseudo-second-order kinetic model. The thermodynamic study indicated that the dye sorptions were spontaneous and exothermic. Lower temperatures were favorable for the sorption processes.