Effect of the chelating agents on bio-sorption of hexavalent chromium using Agave sisalana fibers

doi:10.1016/j.cjche.2017.10.016

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (5): 984-992.DOI: 10.1016/j.cjche.2017.10.016

• Separation Science and Engineering • 上一篇下一篇

Effect of the chelating agents on bio-sorption of hexavalent chromium using Agave sisalana fibers

H. Bendjeffal^1,2, A. Djebli³, H. Mamine², T. Metidji², M. Dahak², N. Rebbani², Y. Bouhedja²

1 Higher School of Technological Education, ENSET-Skikda, 21000, Algeria;
2 Laboratory of Water Treatment and Valorization of Industrial Wastes, Badji-Mokhtar University, P. O. Box 12, Annaba 23000, Algeria;
3 Centre de Recherche Scientifique, et Technique en Analyses Physico-Chimiques, BP 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail CP 42004, Tipaza, Algeria

收稿日期:2017-10-03 修回日期:2017-10-30 出版日期:2018-05-28 发布日期:2018-06-29
通讯作者: H.Bendjeffal,E-mail address:bendjeffal_hacene@enset-skikda.dz

Effect of the chelating agents on bio-sorption of hexavalent chromium using Agave sisalana fibers

H. Bendjeffal^1,2, A. Djebli³, H. Mamine², T. Metidji², M. Dahak², N. Rebbani², Y. Bouhedja²

1 Higher School of Technological Education, ENSET-Skikda, 21000, Algeria;
2 Laboratory of Water Treatment and Valorization of Industrial Wastes, Badji-Mokhtar University, P. O. Box 12, Annaba 23000, Algeria;
3 Centre de Recherche Scientifique, et Technique en Analyses Physico-Chimiques, BP 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail CP 42004, Tipaza, Algeria

Received:2017-10-03 Revised:2017-10-30 Online:2018-05-28 Published:2018-06-29
Contact: H.Bendjeffal,E-mail address:bendjeffal_hacene@enset-skikda.dz

摘要/Abstract

摘要： The current work is focused on the study of the bio-sorption of hexavalent chromium from aqueous solution using sisal natural fiber (Agave sisalana) treated by various chelating agents (ligands) such as urea (UR), thiocarbamide (TC), ethylenediaminetetraacetic acid (EDTA), and diphenyl carbazide (DCZ). The fiber treatments were investigated using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning electron microscope (SEM). The kinetics of chromium bio-sorption was studied in batch presses under the effect of some physicochemical factors such as the nature of chelating agent (F@UR, F@TC, F@DCZ, and F@EDTA), adsorbent dose (2-10 g·L^-1), chromium initial concentration (100-500 mg·L^-1), solution pH (1-6), and batch temperature (20℃-50℃). This study resulted in an optimum adsorption at a chromium initial concentration of 100 mg·L^-1, at pH 2, and at 20℃. The obtained results showed clearly that the treatment with chelating agent boosts the adsorptive capacity of A. sisalana fibers Cr(VI) 10.9 mg·g^-1 to 58.6 mg·g^-1. The modeling study showed that the adsorption kinetics obey the pseudo-second-order model, with an R² in the range of 0.991 and 0.999. The bio-sorption isotherms followed the Langmuir model; the maximum uptake capacity of (F@N, F@UR, F@TC, F@DCZ, and F@EDTA) was found to be respectively, 12.3 mg·g^-1, 25.33 mg·g^-1, 28.73 mg·g^-1, 42.54 mg·g^-1, and 61.45 mg·g^-1. The determined adsorption thermodynamics parameters such as enthalpy, free energy, and entropy showed that the adsorption process is exothermic, spontaneous, and has a stable configuration.

关键词: Agave sisalana, Bio-sorption, Chelating agent, Chromium (VI), Fibers

Abstract: The current work is focused on the study of the bio-sorption of hexavalent chromium from aqueous solution using sisal natural fiber (Agave sisalana) treated by various chelating agents (ligands) such as urea (UR), thiocarbamide (TC), ethylenediaminetetraacetic acid (EDTA), and diphenyl carbazide (DCZ). The fiber treatments were investigated using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning electron microscope (SEM). The kinetics of chromium bio-sorption was studied in batch presses under the effect of some physicochemical factors such as the nature of chelating agent (F@UR, F@TC, F@DCZ, and F@EDTA), adsorbent dose (2-10 g·L^-1), chromium initial concentration (100-500 mg·L^-1), solution pH (1-6), and batch temperature (20℃-50℃). This study resulted in an optimum adsorption at a chromium initial concentration of 100 mg·L^-1, at pH 2, and at 20℃. The obtained results showed clearly that the treatment with chelating agent boosts the adsorptive capacity of A. sisalana fibers Cr(VI) 10.9 mg·g^-1 to 58.6 mg·g^-1. The modeling study showed that the adsorption kinetics obey the pseudo-second-order model, with an R² in the range of 0.991 and 0.999. The bio-sorption isotherms followed the Langmuir model; the maximum uptake capacity of (F@N, F@UR, F@TC, F@DCZ, and F@EDTA) was found to be respectively, 12.3 mg·g^-1, 25.33 mg·g^-1, 28.73 mg·g^-1, 42.54 mg·g^-1, and 61.45 mg·g^-1. The determined adsorption thermodynamics parameters such as enthalpy, free energy, and entropy showed that the adsorption process is exothermic, spontaneous, and has a stable configuration.

Key words: Agave sisalana, Bio-sorption, Chelating agent, Chromium (VI), Fibers

H. Bendjeffal, A. Djebli, H. Mamine, T. Metidji, M. Dahak, N. Rebbani, Y. Bouhedja. Effect of the chelating agents on bio-sorption of hexavalent chromium using Agave sisalana fibers[J]. Chinese Journal of Chemical Engineering, 2018, 26(5): 984-992.

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Effect of the chelating agents on bio-sorption of hexavalent chromium using Agave sisalana fibers

Effect of the chelating agents on bio-sorption of hexavalent chromium using Agave sisalana fibers

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