Methylene blue (MB) dye is used by the textile industry (in particular in dyeing cotton and silk) and often serves as a model for studying the adsorbent capacity of solid materials. MB was employed in this paper to evaluate the adsorbent properties of carbonaceous residues following the extraction of valuable metals from oil fly ash. Three samples of solid residues from two Sicilian oil power plants were used. The amounts of MB adsorbed at room temperature by 1 g of each carbonaceous residue contacted with 50 mL of 0.2-1g L-1 MB over variable periods of time (0.5-24 hours) were measured. The maximum amount of MB was adsorbed in one hour of contact time and 1-4 g of residues were necessary for the removal of MB from 50 mL of the contacted solutions. The MB adsorbed was released almost immediately when residues were recontacted with water, thus allowing regeneration of the adsorbent.
OIL FLY ASH AS LOW-COST ADSORBENT OF METHYLENE BLUE FROM INDUSTRIAL WASTEWATER
PRIMERANO, Patrizia
2012-01-01
Abstract
Methylene blue (MB) dye is used by the textile industry (in particular in dyeing cotton and silk) and often serves as a model for studying the adsorbent capacity of solid materials. MB was employed in this paper to evaluate the adsorbent properties of carbonaceous residues following the extraction of valuable metals from oil fly ash. Three samples of solid residues from two Sicilian oil power plants were used. The amounts of MB adsorbed at room temperature by 1 g of each carbonaceous residue contacted with 50 mL of 0.2-1g L-1 MB over variable periods of time (0.5-24 hours) were measured. The maximum amount of MB was adsorbed in one hour of contact time and 1-4 g of residues were necessary for the removal of MB from 50 mL of the contacted solutions. The MB adsorbed was released almost immediately when residues were recontacted with water, thus allowing regeneration of the adsorbent.Pubblicazioni consigliate
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