Removal of Ni(II) ions from aqueous solutions using clinoptilolite: equilibrium, kinetic and thermodynamic studies

被引：14

作者：

Hannachi, Yasser ^{[1
]}

Ghorbel, Ali ^{[1
]}

Lasram, Tahar ^{[1
]}

Boubaker, Taoufik ^{[1
]}

机构：

[1] Fac Sci Monastir, Lab Heterocycl Chem Nat Prod & React, Monastir, Tunisia

来源：

CHEMISTRY AND ECOLOGY | 2012年 / 28卷 / 05期

关键词：

clinoptilolite; ion-exchange; Langmuir isotherm; Dubinin-Radushkevich model; kinetics; Ni(II); thermodynamic; MIR spectra; NATURAL ZEOLITES; METAL-IONS; ADSORPTION; NICKEL; SORPTION; BIOMASS; CD(II); NI2+;

D O I：

10.1080/02757540.2012.666528

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In this study, clinoptilolite was characterised and used for the removal of Ni(II) from aqueous solutions. The effect of pH, adsorbent dosage, contact time and temperature on the adsorption process was studied in batch experiments. Kinetics data were best described by a pseudo-second-order model. The maximum uptake was 39.7 mg . g(-1). The adsorption data can be well described by the Langmuir isotherm. Thermodynamic studies indicated that the adsorption was spontaneous and exothermic in nature. The sorption energy calculated from the Dubinin-Radushkevich isotherm indicated that the removal of Ni(II) took place via an ion-exchange mechanism. FTIR spectra measured in the middle infrared showed that the ionic exchange in clinoptilolite causes a change in intensity of the band at similar to 676 cm(-1), connected with pseudolattice vibrations of rings formed by AlO4 and SiO4 tetrahedra.

引用

页码：481 / 495

页数：15

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