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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Evaluation of the Leaching Behavior of Hexavalent...

Evaluation of the Leaching Behavior of Hexavalent Chromium from Malaysian Electric Arc Furnace Steel Slag

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Abstract:

This study investigates the leaching behavior of hexavalent chromium (Cr (VI)) from both industrial electric arc furnace steel slag and steel slag modified with up to 2% wt Cr2O3. The study was performed with European standard batch leaching test for 15 days and the lixiviant used were alkaline, de-ionized and rain water. The experimental work was also complimented with slag characterization using XRF, XRD and SEM/EDX analysis. After 15 days, Cr (VI) was found to be highest in rain water (0.016 mg/L) and lowest in de-ionized water (0.002 mg/L). With more Cr2O3 in EAF slag, more Cr will leach out based on the 2% wt Cr2O3 addition. Besides the lixiviant used, slag stirring speed and liquid to solid ratio also affect the dissolution of Cr (VI). With up to 2 wt % Cr2O3 in EAF slag, Cr (VI) dissolution was still lower than the threshold of 0.1 mg/L set by USEPA for public water systems. The analysis also indicated that the relative amounts of soluble basic and acidic oxides in the slag will affect the dissolution of Cr (VI).

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Advances in Materials and Materials Processing

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

1628-1632

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.1628

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Online since:

January 2013

Authors:

Kolawole Bankole Lateef, Abdul Rezan Sheikh, Mohd Sharif Nurulakmal, Norlia Baharun

Keywords:

Characterization, EAF Steel Slag, Hexavalent Chromium, Leaching

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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