Thermodynamic studies of Ni(II) adsorption onto bentonite from aqueous solution

被引：243

作者：

Tahir, SS ^{[1
]}

Rauf, N ^{[1
]}

机构：

[1] Pakistan Environm Protect Agcy, Cent Lab Environm Anal, Islamabad, Pakistan

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2003年 / 35卷 / 12期

关键词：

adsorption; thermodynamics; nickel; langmuir; freundlich; D-R isotherms; enthalpy; entropy; Gibbs free energy;

D O I：

10.1016/S0021-9614(03)00153-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The adsorption behavior of Ni(II) onto bentonite was studied as a function of temperature under optimized conditions of shaking time, amount of adsorbent, pH, and concentration of the adsorbate. Thermodynamic parameters such as DeltaH(degrees), DeltaS(degrees), and DeltaG(degrees) were calculated from the slope and intercept of the linear plot of 1gK(D) against 1/T. Analysis of adsorption results obtained at T = (298, 303, 313, and 323) K showed that the adsorption pattern on bentonite followed the Langmuir, Freundlich, and D-R isotherms. A flame atomic absorption spectrophotometer was used for measuring the concentration of Ni(II). (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2003 / 2009

页数：7

共 29 条

[1]

BARROW GM, 1996, PHYS CHEM, P344

[2]

BERRUETA JM, 1990, J SOL EXTR ION EXCHA, V8, P817

[3]

Bikerman J. J., 1958, SURFACE CHEM THEORY, P294

[4]

BLACKMAN AG, 1969, CIV ENG IND MINERALS, V25, P23

[5]

Dubinin M. M., 1947, DOKL AKAD NAUK SSSR, V55, P331

[6]

Freundlich Herbert., 1926, COLLOID CAPILLARY CH

[7]

GRIMSHAW RW, 1972, CHEM PHYS CLAYS OTHE, P1024

[8] Trace level removal studies of Cr(III) from aqueous solution [J].

Ikram, M ;

Rauf, MA ;

Rauf, N .

JOURNAL OF TRACE AND MICROPROBE TECHNIQUES, 2002, 20 (01) :119-125

[9] ADSORPTION OF CD(II) AND PB(II) ON BENTONITE UNDER ESTUARINE AND SEAWATER CONDITIONS [J].

KOZAR, S ;

BILINSKI, H ;

BRANICA, M ;

SCHWUGER, MJ .

SCIENCE OF THE TOTAL ENVIRONMENT, 1992, 121 :203-216

[10] THE ADSORPTION OF GASES ON PLANE SURFACES OF GLASS, MICA AND PLATINUM. [J].

Langmuir, Irving .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1918, 40 :1361-1403

← 1 2 3 →