Journal
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
Volume 38, Issue 3, Pages 555-562Publisher
MARCEL DEKKER INC
DOI: 10.1081/ESE-120016917
Keywords
adsorption; indigo carmine; extracted residue of coffee beans; intraparticle diffusion
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The adsorption ability of charcoal from extracted-residue of coffee beans for indigo carmine removal was investigated by the batch-method. Differences in the removal ratio and removal rate of, indigo carmine could be explained by differences in the properties of charcoal. In the relationship between the amount of indigo carmine adsorbed and the square root of elapsed time, a good linearity was recognized. Since the relationship between the amount of indigo carmine adsorbed and square root of elapsed time showed a good linearity, the intraparticle diffusion of indigo carmine onto pores of adsorbents was identified as the rate-limiting step in the adsorption process.
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