Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull

This paper presents low-cost and recyclable activated carbon (XLAC) derived from Xanthoceras sorbifolia Bunge hull for high-efficiency adsorption of Cd(II) and Hg(II) ions in industrial wastewater. XLAC was prepared through H3PO4 activation and was characterized using N2 adsorption-desorption, scann...

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Main Authors: Xiaotao Zhang, Yinan Hao, Ximing Wang, Zhangjing Chen, Chun Li
Format: Article
Language:English
Published: Hindawi Limited 2016-01-01
Series:Journal of Chemistry
Online Access:http://dx.doi.org/10.1155/2016/4326351
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spelling doaj-7d8d722186d44d6580351b6300f1a32d2020-11-24T22:29:04ZengHindawi LimitedJournal of Chemistry2090-90632090-90712016-01-01201610.1155/2016/43263514326351Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge HullXiaotao Zhang0Yinan Hao1Ximing Wang2Zhangjing Chen3Chun Li4College of Science, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018, ChinaDepartment of Sustainable Biomaterials, Virginia Tech, Blacksburg, VA 24061, USACollege of Science, Inner Mongolia Agricultural University, Hohhot 010018, ChinaThis paper presents low-cost and recyclable activated carbon (XLAC) derived from Xanthoceras sorbifolia Bunge hull for high-efficiency adsorption of Cd(II) and Hg(II) ions in industrial wastewater. XLAC was prepared through H3PO4 activation and was characterized using N2 adsorption-desorption, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDX), and Fourier transform infrared (FTIR) spectroscopy. In single-metal-system adsorption experiments, the maximum adsorption capacities for Cd(II) and Hg(II) obtained under different experimental conditions were 388.7 and 235.6 mg·g−1, respectively. All adsorption equilibrium data fit perfectly with the Langmuir isotherm model. In a binary metal system, competitive studies demonstrated that the presence of Cd(II) significantly decreased the adsorption of Hg(II), but the adsorption of Cd(II) showed a little change in the presence of Hg(II). In addition, XLAC can be regenerated with a 0.01 mol·L−1 HNO3 solution and reused at least four times. The FTIR spectra revealed that a chemical interaction occurs between functional groups containing lone electron pairs in XLAC and metal ions. Overall, these results suggest that XLAC may be suitable as an adsorbent for heavy metal removal from wastewater streams.http://dx.doi.org/10.1155/2016/4326351
collection DOAJ
language English
format Article
sources DOAJ
author Xiaotao Zhang
Yinan Hao
Ximing Wang
Zhangjing Chen
Chun Li
spellingShingle Xiaotao Zhang
Yinan Hao
Ximing Wang
Zhangjing Chen
Chun Li
Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull
Journal of Chemistry
author_facet Xiaotao Zhang
Yinan Hao
Ximing Wang
Zhangjing Chen
Chun Li
author_sort Xiaotao Zhang
title Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull
title_short Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull
title_full Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull
title_fullStr Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull
title_full_unstemmed Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull
title_sort competitive adsorption of cadmium(ii) and mercury(ii) ions from aqueous solutions by activated carbon from xanthoceras sorbifolia bunge hull
publisher Hindawi Limited
series Journal of Chemistry
issn 2090-9063
2090-9071
publishDate 2016-01-01
description This paper presents low-cost and recyclable activated carbon (XLAC) derived from Xanthoceras sorbifolia Bunge hull for high-efficiency adsorption of Cd(II) and Hg(II) ions in industrial wastewater. XLAC was prepared through H3PO4 activation and was characterized using N2 adsorption-desorption, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDX), and Fourier transform infrared (FTIR) spectroscopy. In single-metal-system adsorption experiments, the maximum adsorption capacities for Cd(II) and Hg(II) obtained under different experimental conditions were 388.7 and 235.6 mg·g−1, respectively. All adsorption equilibrium data fit perfectly with the Langmuir isotherm model. In a binary metal system, competitive studies demonstrated that the presence of Cd(II) significantly decreased the adsorption of Hg(II), but the adsorption of Cd(II) showed a little change in the presence of Hg(II). In addition, XLAC can be regenerated with a 0.01 mol·L−1 HNO3 solution and reused at least four times. The FTIR spectra revealed that a chemical interaction occurs between functional groups containing lone electron pairs in XLAC and metal ions. Overall, these results suggest that XLAC may be suitable as an adsorbent for heavy metal removal from wastewater streams.
url http://dx.doi.org/10.1155/2016/4326351
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