Experimental Study On Utilizing Iron Slag To
Stabilize Cr(VI)-contaminated Soils
Author(s)
O. A. B. Hassan
Abstract
A laboratory study is conducted to test the capacity of two types of iron slag to
stabilize Cr(VI)-contaminated soils. The slag samples are incorporated with soils
in different proportions and the resulting leachate is tested using batch
experiments. The feasibility of using iron is demonstrated as concentrations up to
1000 mg Cr(VI)/kg in the leachate of an alkaline soil are reduced to 0,7 mg
Cr(VI)/kg mix after 12 days, but to less than 5 mg Cr(VI)/kg mix after 7 days.
Small particles size and L/S-ratio are, in most cases, favoured by the reducing
agents to stabilize the contaminated soil. The study demonstrated that the iron
slag can effectively stabilize Cr(VI)-contaminated soils.
Keywords: environmental pollution, iron slag, Cr(VI), soil stabilization,
reduction agents, leaching test, batch experiments.
1 Introduction
The pollution of soils caused by harmful heavy metals has led to new problems
related to the sustainability of the ecosystem. In addition to its environmental
effects, chemically-polluted soils can create technical problems associated with
industry and the building sector, unless they are stabilized and remediated by one
method or another. Chromium is one of the heavy metals that constitute one of
the major causes of soil and water pollution.
In a broader sense, chromium has both beneficial and detrimental properties.
The benefit of Cr is in its necessity for human nutrition (especially in glucose
metabolism). The typical adult intake of Cr is less than 0.2 mg/day [1]. The
detriment of Cr is in its toxicity. Most of the hexavalent chromium Cr(VI)
compounds are toxic and are classified as carcinogenic and mutagenic to both
Keywords
environmental pollution, iron slag, Cr(VI), soil stabilization,
reduction agents, leaching test, batch experiments
Related Book
Other papers in this volume
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