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Removal of Cu2+ from wastewater by modified xanthan gum (XG) with ethylenediamine (EDA)

Removal of Cu2+ from wastewater by modified xanthan gum (XG) with ethylenediamine (EDA)
Removal of Cu2+ from wastewater by modified xanthan gum (XG) with ethylenediamine (EDA)
Herein, a new adsorbent was synthesized by modifying xanthan gum for the removal of Cu2+ fromwastewater. Xanthan gum was first successfully modified with thionyl chloride followed byethylenediamine. The modified xanthan gum was characterized via Fourier transform infraredspectrometry (FTIR), carbon nuclear magnetic resonance (13C NMR), scanning electron microscopy (SEM),energy dispersion spectroscopy (EDS) and thermogravimetry (TG) for a better understanding of its Cu2+removal efficiency. In addition, the effects of pH, contact time, adsorbent dosage, initial concentration ofCu2+ and coexisting ions on the adsorption of Cu2+ were investigated via batch adsorption studies.

Results suggest that the adsorption process of Cu2+ follows a pseudo second order kinetics model withan equilibrium time of 120 min. The experimental data could be fitted with the Langmuir isotherm better than the Freundlich model. The adsorption capacity of Cu2+ by the modified xanthan gum reached up to46.95 (mg g_1). The adsorbent could be easily regenerated by only the addition of 0.1 M HCl. Also, the adsorption effect of other divalent cations by XG-NH2 was preliminarily investigated.
2046-2069
83226-83233
Qiu, Hanyan
0c876b37-8e3c-48cc-8c02-8c24a0cf6aa7
Yan, Junhua
cc26e013-fd65-4fa7-9dd4-8e4ef9b55435
Lan, Guihong
0ae877a8-10a5-4c24-add4-c4c9c8f0ec43
Liu, Yongqiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Song, Xiaoqin
122de2c7-24f0-48a1-8191-be0681912cf0
Peng, Wanxi
28e0e14b-2ca3-4099-b802-74fa0dc96c38
Cui, Yingyi
ebdc5e0e-dd03-4ef7-a91c-9990f217e2aa
Qiu, Hanyan
0c876b37-8e3c-48cc-8c02-8c24a0cf6aa7
Yan, Junhua
cc26e013-fd65-4fa7-9dd4-8e4ef9b55435
Lan, Guihong
0ae877a8-10a5-4c24-add4-c4c9c8f0ec43
Liu, Yongqiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Song, Xiaoqin
122de2c7-24f0-48a1-8191-be0681912cf0
Peng, Wanxi
28e0e14b-2ca3-4099-b802-74fa0dc96c38
Cui, Yingyi
ebdc5e0e-dd03-4ef7-a91c-9990f217e2aa

Qiu, Hanyan, Yan, Junhua, Lan, Guihong, Liu, Yongqiang, Song, Xiaoqin, Peng, Wanxi and Cui, Yingyi (2016) Removal of Cu2+ from wastewater by modified xanthan gum (XG) with ethylenediamine (EDA). RSC Advances, 86 (6), 83226-83233. (doi:10.1039/C6RA11423G).

Record type: Article

Abstract

Herein, a new adsorbent was synthesized by modifying xanthan gum for the removal of Cu2+ fromwastewater. Xanthan gum was first successfully modified with thionyl chloride followed byethylenediamine. The modified xanthan gum was characterized via Fourier transform infraredspectrometry (FTIR), carbon nuclear magnetic resonance (13C NMR), scanning electron microscopy (SEM),energy dispersion spectroscopy (EDS) and thermogravimetry (TG) for a better understanding of its Cu2+removal efficiency. In addition, the effects of pH, contact time, adsorbent dosage, initial concentration ofCu2+ and coexisting ions on the adsorption of Cu2+ were investigated via batch adsorption studies.

Results suggest that the adsorption process of Cu2+ follows a pseudo second order kinetics model withan equilibrium time of 120 min. The experimental data could be fitted with the Langmuir isotherm better than the Freundlich model. The adsorption capacity of Cu2+ by the modified xanthan gum reached up to46.95 (mg g_1). The adsorbent could be easily regenerated by only the addition of 0.1 M HCl. Also, the adsorption effect of other divalent cations by XG-NH2 was preliminarily investigated.

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Accepted/In Press date: 16 August 2016
e-pub ahead of print date: 17 August 2016
Organisations: Water & Environmental Engineering Group

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Local EPrints ID: 400434
URI: https://eprints.soton.ac.uk/id/eprint/400434
ISSN: 2046-2069
PURE UUID: 1d31e9c7-222f-43a8-96b3-473f7286dc58

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Date deposited: 24 Oct 2016 14:40
Last modified: 26 Nov 2019 06:33

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