Blast furnace slags as sorbents of phosphate from water solutions

被引：210

作者：

Kostura, B ^{[1
]}

Kulveitová, H ^{[1
]}

Lesko, J ^{[1
]}

机构：

[1] Tech Univ Ostrava, Dept Chem, CS-70833 Ostrava, Czech Republic

来源：

WATER RESEARCH | 2005年 / 39卷 / 09期

关键词：

phosphate sorption; blast furnace slag; sorption kinetics; acid neutralizing capacity;

D O I：

10.1016/j.watres.2005.03.010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The paper is focused on the sorption of phosphorus from aqueous solutions by crystalline and amorphous blast furnace slags. Slag sorption kinetics were measured, adsorption tests were carried out and the effect of acidification on the sorption properties of slags was studied. The kinetic measurements confirmed that the sorption of phosphorus on crystalline as well as amorphous slags can be described by a model involving pseudo-second-order reactions. For all slag types, phosphorus sorption follows the Langmuir adsorption isotherm. The acid neutralizing capacities of crystalline and amorphous slags were determined. In the case of the crystalline slags, buffering intervals were found to exist during which the slag minerals dissolve in the sequence bredigite-gehlenite-diaspor. There is a high correlation (R-2 = 0.9989) between ANC(3.8) and the saturation capacities of crystalline and amorphous slags. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1795 / 1802

页数：8

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