Equilibrium and Kinetics Characteristics of Copper (II) Sorption onto Gyttja
Equilibrium and Kinetics Characteristics of Copper (II) Sorption onto Gyttja
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DOI：
10.1007/s00128-009-9899-x
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发表时间：
2010
影响因子：
2.7
通讯作者：
H. Dikici;K. Saltali;Serap Bingölbalı
中科院分区：
文献类型：
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作者：
H. Dikici;K. Saltali;Serap Bingölbalı
用Freundlich、Langmuir和Dubinin-Redushck evich(D-R)模型较好地描述了Gyttja对水溶液中Cu2+的吸附特性。绞股蓝的吸附容量(Qmax)为11.76 mg/g−1。D-R模型表明，绞股蓝对Cu2+的吸附几乎以化学吸附为主。自由能变化(ΔG)、热变(ΔH)和熵(ΔS)等热力学参数表明，Gyttja对Cu2+的吸附过程是可行的、自发的和吸热的。平衡数据的动力学检验表明，Cu2+离子的吸附过程符合准二级动力学模型。
The sorption characteristics of gyttja to remove copper (Cu2+) ions from aqueous solutions were satisfactorily described with the Freundlich, Langmuir and Dubinin–Redushckevich (D–R) models. The sorption capacity (qmax) of gyttja was 11.76 mg g−1. The D–R model indicated that the sorption of Cu2+by gyttja was almost taken place by chemisorption. Thermodynamic parameters such as change in free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) suggested that the adsorption process of Cu2+by gyttja was feasible, spontaneous and endothermic in nature. Kinetic examination of the equilibrium data showed that the sorption processes of Cu2+ions followed well pseudo-second-order kinetics model.