Removal of 2-Aminophenol Using Novel Adsorbents

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• 作者：Vinod K. Gupta ; Dinesh Mohan ; Suhas ; and Kunwar P. Singh
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2006
• 出版时间：February 1, 2006
• 年：2006
• 卷：45
• 期：3
• 页码：1113 - 1122
• 全文大小：194K
• 年卷期：v.45,no.3(February 1, 2006)
• ISSN：1520-5045

文摘

Removal of toxic substances from wastewaters using low-cost alternatives to activated carbon is an importantarea in environmental sciences. Efforts have been made to convert a fertilizer waste and a steel industrywaste into low-cost potential adsorbents. The developed products have been used for the removal of2-aminophenol from aqueous solutions and wastewaters. Studies were conducted to delineate the effects oftemperature, initial absorbate concentration, particle size of the adsorbent, and solid-to-liquid ratio. Equilibriumisotherms were determined at selected pH's to assess the maximum adsorption capacity of the adsorbents.Both Freundlich and Langmuir models were used to interpret the adsorption data. The adsorption of 2-aminophenol is an endothermic process. Kinetic studies were performed, and various parameters such as masstransfer coefficient, effective diffusion coefficient, activation energy, and entropy of activation were evaluatedto establish the mechanism of removal. Column studies were performed, and the breakthrough curves wereused to optimize the contactors and identify a design correlation. Some feasibility experiments were alsocarried out with an aim to recover 2-aminophenol and demonstrate chemical regeneration of the spent columns.The column capacities of 312 and 30.00 mg/g were more than the batch capacities, which were 80.75 and28.37 mg/g for activated carbon and activated slag, respectively. Overall, activated carbon developed fromfertilizer waste exhibits better performance than activated slag developed from blast furnace slag.