Competitive adsorption of Hg2+, Pb2+ and Co2+ ions on polyacrylamide/attapulgite

Shouyong Zhou; Ailian Xue; Yijiang Zhao; Qiwei Wang; Yan Chen; Meisheng Li; Weihong Xing

doi:10.1016/j.desal.2010.11.055

Competitive adsorption of Hg2+, Pb2+ and Co2+ ions on polyacrylamide/attapulgite

Shouyong Zhou, Ailian Xue, Yijiang Zhao, Qiwei Wang, Yan Chen, Meisheng Li, Weihong Xing

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

84 Scopus citations

Abstract

In the present study, the competitive adsorption characteristics of binary and ternary heavy metal ions Hg²⁺, Pb²⁺ and Co²⁺ on polyacrylamide/attapulgite (PAM/ATP) were investigated in batch systems. PAM/ATP was prepared by the solution polymerization of acrylamide (AM) onto Γ-methacryloxypropyl trimethoxy silane (KH-570) modified attapulgite (ATP) and characterized by the technique of X-ray photoelectron spectroscopy (XPS). Equilibrium and kinetic adsorption data showed that PAM/ATP displays a high selectivity towards one metal in a two-component or a three-component system with an affinity order of Hg²⁺ > Pb²⁺ > Co²⁺. The equilibrium behaviors of heavy metal species with stronger affinity toward PAM/ATP can be described by the Langmuir equation while the adsorption kinetics of the metals can be well fitted to a pseudo-second-order kinetic model. Desorption was performed using hot acetic acid, and the regenerated adsorbents could be reused with little loss of adsorption capacity.

Original language	English
Pages (from-to)	269-274
Number of pages	6
Journal	Desalination
Volume	270
Issue number	1-3
DOIs	https://doi.org/10.1016/j.desal.2010.11.055
State	Published - 1 Apr 2011

Keywords

Attapulgite
Competitive adsorption
Heavy metal ions
Polyacrylamide
Selectivity

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title = "Competitive adsorption of Hg2+, Pb2+ and Co2+ ions on polyacrylamide/attapulgite",

abstract = "In the present study, the competitive adsorption characteristics of binary and ternary heavy metal ions Hg2+, Pb2+ and Co2+ on polyacrylamide/attapulgite (PAM/ATP) were investigated in batch systems. PAM/ATP was prepared by the solution polymerization of acrylamide (AM) onto Γ-methacryloxypropyl trimethoxy silane (KH-570) modified attapulgite (ATP) and characterized by the technique of X-ray photoelectron spectroscopy (XPS). Equilibrium and kinetic adsorption data showed that PAM/ATP displays a high selectivity towards one metal in a two-component or a three-component system with an affinity order of Hg2+ > Pb2+ > Co2+. The equilibrium behaviors of heavy metal species with stronger affinity toward PAM/ATP can be described by the Langmuir equation while the adsorption kinetics of the metals can be well fitted to a pseudo-second-order kinetic model. Desorption was performed using hot acetic acid, and the regenerated adsorbents could be reused with little loss of adsorption capacity.",

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author = "Shouyong Zhou and Ailian Xue and Yijiang Zhao and Qiwei Wang and Yan Chen and Meisheng Li and Weihong Xing",

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T1 - Competitive adsorption of Hg2+, Pb2+ and Co2+ ions on polyacrylamide/attapulgite

AU - Zhou, Shouyong

AU - Xue, Ailian

AU - Zhao, Yijiang

AU - Wang, Qiwei

AU - Chen, Yan

AU - Li, Meisheng

AU - Xing, Weihong

PY - 2011/4/1

Y1 - 2011/4/1

N2 - In the present study, the competitive adsorption characteristics of binary and ternary heavy metal ions Hg2+, Pb2+ and Co2+ on polyacrylamide/attapulgite (PAM/ATP) were investigated in batch systems. PAM/ATP was prepared by the solution polymerization of acrylamide (AM) onto Γ-methacryloxypropyl trimethoxy silane (KH-570) modified attapulgite (ATP) and characterized by the technique of X-ray photoelectron spectroscopy (XPS). Equilibrium and kinetic adsorption data showed that PAM/ATP displays a high selectivity towards one metal in a two-component or a three-component system with an affinity order of Hg2+ > Pb2+ > Co2+. The equilibrium behaviors of heavy metal species with stronger affinity toward PAM/ATP can be described by the Langmuir equation while the adsorption kinetics of the metals can be well fitted to a pseudo-second-order kinetic model. Desorption was performed using hot acetic acid, and the regenerated adsorbents could be reused with little loss of adsorption capacity.

AB - In the present study, the competitive adsorption characteristics of binary and ternary heavy metal ions Hg2+, Pb2+ and Co2+ on polyacrylamide/attapulgite (PAM/ATP) were investigated in batch systems. PAM/ATP was prepared by the solution polymerization of acrylamide (AM) onto Γ-methacryloxypropyl trimethoxy silane (KH-570) modified attapulgite (ATP) and characterized by the technique of X-ray photoelectron spectroscopy (XPS). Equilibrium and kinetic adsorption data showed that PAM/ATP displays a high selectivity towards one metal in a two-component or a three-component system with an affinity order of Hg2+ > Pb2+ > Co2+. The equilibrium behaviors of heavy metal species with stronger affinity toward PAM/ATP can be described by the Langmuir equation while the adsorption kinetics of the metals can be well fitted to a pseudo-second-order kinetic model. Desorption was performed using hot acetic acid, and the regenerated adsorbents could be reused with little loss of adsorption capacity.

KW - Attapulgite

KW - Competitive adsorption

KW - Heavy metal ions

KW - Polyacrylamide

KW - Selectivity

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DO - 10.1016/j.desal.2010.11.055

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SN - 0011-9164

VL - 270

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JO - Desalination

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ER -

Competitive adsorption of Hg2+, Pb2+ and Co2+ ions on polyacrylamide/attapulgite

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Keywords

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