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Citation: YAO Qingxin, XIE Jianjun, LIU Junxia, TANG Liping, LIU Yuan. Effect of Ionic Strength on the Adsorption of Pb²⁺ and Cu²⁺ onto Bentonite/Sodium Lignosulfonate Graft-Polymerized with Acrylamide and Maleic Anhydride[J]. Chinese Journal of Applied Chemistry, ;2015, 32(8): 940-947. doi: 10.11944/j.issn.1000-0518.2015.08.140436 shu

Effect of Ionic Strength on the Adsorption of Pb²⁺ and Cu²⁺ onto Bentonite/Sodium Lignosulfonate Graft-Polymerized with Acrylamide and Maleic Anhydride

1.
School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China

Corresponding author: XIE Jianjun,
Received Date: 22 December 2014
Available Online: 10 March 2015
Fund Project: 国家自然科学基金资助项目(31270603) (31270603)

Adsorbent composites comprising of bentonite/sodium lignosulfonate graft-polymerized with acrylamide and maleic anhydride (BLPAMA) were prepared and used to investigate the effect of ionic strength on the adsorption of Pb²⁺ or Cu²⁺ onto BLPAMA in single or binary metal ion solutions,the adsorption isotherms,kinetics and thermodynamics of Pb²⁺ and Cu²⁺ onto BLPAMA with or without addition of 0.2 mol/L NaNO₃ in the binary metal ion solutions.The results show that the increase of ionic strength leads the adsorption capacity of Pb²⁺ or Cu²⁺ to decrease in the single metal ion solution,the adsorption capacity of Pb²⁺ to decrease while the adsorption capacity of Cu²⁺ to increase in the binary metal ion solution.
- lignin,
- adsorption,
- ionic strength,
- additive electrolyte,
- heavy metal ions
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沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of Ionic Strength on the Adsorption of Pb2+ and Cu2+ onto Bentonite/Sodium Lignosulfonate Graft-Polymerized with Acrylamide and Maleic Anhydride

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通讯作者: 陈斌, bchen63@163.com

Effect of Ionic Strength on the Adsorption of Pb²⁺ and Cu²⁺ onto Bentonite/Sodium Lignosulfonate Graft-Polymerized with Acrylamide and Maleic Anhydride