Banana Peel Applied to the Solid Phase Extraction of Copper and Lead from River Water: Preconcentration of Metal Ions with a Fruit Waste

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• 作者：Renata S. D. Castro ; Lae虂rcio Caetano ; Guilherme Ferreira ; Pedro M. Padilha ; Margarida J. Saeki ; Luiz F. Zara ; Marco Antonio U. Martines ; Gustavo R. Castro
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：March 16, 2011
• 年：2011
• 卷：50
• 期：6
• 页码：3446-3451
• 全文大小：810K
• 年卷期：v.50,no.6(March 16, 2011)
• ISSN：1520-5045

文摘

This article reports on an investigation into the ability of minced banana peel to extract lead and copper ions from water and the parameters involved in this process. The kinetics of copper and lead uptake reached equilibrium in 10 min and the extraction of metals ions was favorable above pH 3. The medium was characterized by FTIR, which showed absorption bands of carboxylic and amine groups at 1730 and 889 cm¹, respectively. The adsorption isotherm fitted by Langmuir鈥檚 model showed maximum adsorption capacities of 0.33 and 0.20 mmol g^鈭? (or 20.97 and 41.44 mg g^鈭?) for Cu(II) and Pb(II), respectively. Minced banana peel was applied in the preconcentration system and showed approximately 20-fold enrichment factor and the column was reused for 11 cycles without loss in the percentage of recovery. The proposed method was applied in the determination of Cu(II) and Pb(II) in a sample of raw river water and was validated by comparison with a standard reference material.