Fuller's earth and fired clay as adsorbents for dyestuffs |
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Authors: | Gordon McKay Michael S Otterburn Jamal A Aga |
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Institution: | 1. Department of Chemical Engineering, the Queen's University of Belfast, BT9 5DL, Belfast, N. Ireland
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Abstract: | The ability of Fuller's earth to adsorb a basic dye (Astrazone Blue — Basic Blue 69) and an acidic dye (Telon Blue - Acid Blue 25) has been studied. The equilibrium saturation adsorption capacities were 1200 mg dye g?1 Fuller's earth and 220 mg dye g?1 Fuller's earth for Astrazone Blue and Telon Blue, respectively. The kinetics of the adsorption processes were studied in an agitated batch adsorber. The time to reach 90% equilibrium value was achieved in less than 1 h. The variables investigated were agitation, adsorbent mass, initial dye concentration and temperature. A limited number of studies were undertaken using a fired clay but significantly lower saturation capacities were obtained, namely, 7 mg dye g?1 fired clay and 40 mg dye g?1 fired clay for Telon Blue and Astrazone Blue, respectively. |
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