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The use of EAF dust in cement composites: Assessment of environmental impact

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Abstract.
Electric arc filter dust (EAF dust) is a waste by-product which occurs in the production of steel. Instead of
being disposed of, it can be used in cement composites for civil engineering, and for balances in washing
machines. To estimate the environmental impact of the use of EAF dust in cement composites leachability
tests based on diffusion were performed using water and salt water as leaching agents. Compact and
ground cement composites, and cement composites with addition of 1.5% of EAF dust by masswere studied.
The concentrations of total Cr and Cr(VI)were determined in leachates over a time period of 175 days.
At the end of the experiment the concentrations of some other metalswere also determined in leachates.
The results indicated that Cr in leachates was present almost solely in its hexavalent form. No leaching of
Cr(VI) was observed in aqueous leachates from compact cement composites and compact cement composites
to which different quantities of EAF dust have been added. In ground cement composites and in
ground cement composites with addition of EAF dust, Cr(VI) was leached with water in very low concentrations
up to 5ugL−1. Cr(VI) concentrations were higher in salt water leachates. In compact and ground
cement composites with addition of EAF dust Cr(VI) concentrationswere 40 and 100 ugL−1, respectively.
It was experimentally found that addition of EAF dust had almost no influence on leaching of Cr(VI) from
cement composites. Leaching of Cr(VI) originated primarily from cement. Leaching of other metals from
composites investigated did not represent an environmental burden. From the physico-mechanical and
environmental aspects EAF dust can be used as a component in cement mixtures.

Keywords:
Cement composites
Cement composites with addition of EAF
dust
Leachability
Cr(VI)
Metals

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 166 (2009) 277–283

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

LINGKUNGAN HIDUP

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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