Extraction of aluminum from fly-ash by commercial and microbiologically-produced citric acid |
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Authors: | A Singer J Navrot R Shapira |
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Institution: | (1) Faculty of Agriculture, The Hebrew University of Jerusalem, 76100 Rehovot, Israel |
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Abstract: | Summary Aluminum extraction from two aluminum-rich fly-ashes by commercial and microbiologically-produced citric acids was tested. Up to 12% Al2O3 of the total was extracted by a 21 hrs1 shaking treatment at 60° C. Extraction efficiency is considerably affected by extracting acid concentration and extraction temperature. The extraction efficiency of microbiologically-produced citric acids was only slightly lower than that of commercial citric acid of equal molarity. |
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