SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (3): 455-464.DOI: 10.1016/j.cjche.2017.06.026

• Separation Science and Engineering • Previous Articles     Next Articles

Heavy metals adsorption by banana peels micro-powder: Equilibrium modeling by non-linear models

Giorgio Vilardi, Luca Di Palma, Nicola Verdone   

  1. Sapienza University of Rome, Department of Chemical Engineering Materials Environment, via Eudossiana 18, 00184 Rome, Italy
  • Received:2017-05-10 Revised:2017-06-28 Online:2018-04-18 Published:2018-03-28
  • Contact: Giorgio Vilardi

Heavy metals adsorption by banana peels micro-powder: Equilibrium modeling by non-linear models

Giorgio Vilardi, Luca Di Palma, Nicola Verdone   

  1. Sapienza University of Rome, Department of Chemical Engineering Materials Environment, via Eudossiana 18, 00184 Rome, Italy
  • 通讯作者: Giorgio Vilardi

Abstract: In this study the copper and lead adsorption efficiency onto banana peels powder was investigated. The agroindustrial waste recovery represents one of the Circular Economy pillars. In the view of the synthesis of an environmentally friendly adsorbent material, the powder was used without any preliminary chemical or thermal activation, but only after simple washing, drying and grinding. The bio-adsorbent was characterized by the FTIR technique and tested in batch mode on synthetic aqueous solutions containing Pb and Cu in the range 10-90 mg·L-1. A selection of two (Langmuir, Freundlich) and three (Sips, Redlich-Peterson, Koble-Corrigan) parameter isotherm models was chosen to fit adsorption equilibrium data by non-linear regression procedure. The best fit isotherm model was selected relying on the error function with the lowest average percentage error (APE) value, among those characterized by the highest R2 values. As expected, the three-parameter models are found to better represent both metals bio-adsorption, with APE and R2 values always lower and higher, respectively, than the corresponding values obtained for the two-parameter models.

Key words: Banana peel, Heavy metals, Bio-adsorbent, Non-linear model, FTIR

摘要: In this study the copper and lead adsorption efficiency onto banana peels powder was investigated. The agroindustrial waste recovery represents one of the Circular Economy pillars. In the view of the synthesis of an environmentally friendly adsorbent material, the powder was used without any preliminary chemical or thermal activation, but only after simple washing, drying and grinding. The bio-adsorbent was characterized by the FTIR technique and tested in batch mode on synthetic aqueous solutions containing Pb and Cu in the range 10-90 mg·L-1. A selection of two (Langmuir, Freundlich) and three (Sips, Redlich-Peterson, Koble-Corrigan) parameter isotherm models was chosen to fit adsorption equilibrium data by non-linear regression procedure. The best fit isotherm model was selected relying on the error function with the lowest average percentage error (APE) value, among those characterized by the highest R2 values. As expected, the three-parameter models are found to better represent both metals bio-adsorption, with APE and R2 values always lower and higher, respectively, than the corresponding values obtained for the two-parameter models.

关键词: Banana peel, Heavy metals, Bio-adsorbent, Non-linear model, FTIR