PEAT AS AN ADSORBENT FOR DYESTUFFS AND METALS IN WASTE-WATER

被引：42

作者：

ALLEN, SJ

MURRAY, M

BROWN, P

FLYNN, O

机构：

[1] Questor Centre, Department of Chemical Engineering, The Queen's University of Belfast, Northern Ireland

来源：

RESOURCES CONSERVATION AND RECYCLING | 1994年 / 11卷 / 1-4期

关键词：

Agitated batch adsorbers - External mass transfer coefficients - Fixed bed adsorbers - Maximum adsorption capacity;

D O I：

10.1016/0921-3449(94)90076-0

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The ability of peat to adsorb dyestuffs and metals from wastewaters was investigated. Equilibrium isotherms were determined in order to assess the maximum adsorption capacity of some basic and acidic dyestuffs, and metal ions onto peat, lignite and other adsorbents. Economic evaluations indicated that peat was a particularly attractive adsorbent. Kinetic studies for the adsorption of basic dyes onto peat were undertaken in agitated batch and fixed bed adsorbers. Mass transport models detailed elsewhere were tested and used to predict (a) the concentration decay curve for batch adsorption and (b) the breakthrough curves in fixed bed adsorption. The models tested were single-resistance models and included an estimation of the external mass transfer coefficients.

引用

页码：25 / 39

页数：15

共 6 条

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[3] Furusawa, Smith, Fluid-particle and intraparticle mass transport in slurries, Ind. Eng. Chem. Fundam., 12, pp. 197-203, (1973)
[4] Mathews, Weber, Effects of external mass transfer and intraparticle diffusion on adsorption rates in slurry reactors, Am. Inst. Chem. Eng. J., 73, pp. 91-98, (1976)
[5] McKay, Allen, Surface mass transfer processes using peat as an adsorbent for dyestuffs, Can. J. Chem. Eng., 58, pp. 521-526, (1980)
[6] Woods, The adsorption of chlorinated organics and activated carbons, Project thesis, (1992)

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