Environmental Science and Pollution Research

, Volume 26, Issue 2, pp 1315–1322 | Cite as

Removal of Pb(II) from aqueous solutions by adsorption on magnetic bentonite

  • Chenglong Zou
  • Wei Jiang
  • Jiyan LiangEmail author
  • Xiaohang Sun
  • Yinyan Guan
Research Article


Bentonite is a porous clay material that shows good performance for adsorbing heavy metals and other pollutants for wastewater remediation. In our previous study, magnetic bentonite (M-B) was prepared to solve the separation problem and improve the operability. In this study, we investigated the influence of various parameters on the Pb(II) adsorption of M-B, and it showed effective performance. About 98.9% adsorption removal rate was achieved within 90 min at adsorbent dose of 10 g/L for initial Pb(II) concentration of 200 mg/L at 40 °C and pH 5. The adsorption kinetic fit well by the pseudo-second-order model, and also followed the intra-particle diffusion model up to 90 min. Moreover, adsorption data were successfully reproduced by the Langmuir isotherm; the maximum adsorption capacity was calculated as 80.40 mg/g. The mechanism of interaction between Pb(II) ions and M-B was ionic exchange, surface complexation, and electro-static interactions. Thermodynamics study indicated that the reaction of Pb(II) adsorption on M-B was endothermic and spontaneous; increasing the temperature promoted adsorption. This study was expected to provide a reference and theoretical basis for the treatment of Pb-containing wastewater using bentonite materials.


Bentonite Magnetic Pb(II) ions Adsorption Kinetics Thermodynamics Isotherms Mechanism 


Funding information

The authors are grateful for financial support from “Liaoning BaiQianWan Talents Program” and the China Environmental Protection Foundation, Geping Green Action, “123 Project” (Grant No. CEPF2014-123-1-6).

Supplementary material

11356_2018_3652_MOESM1_ESM.doc (7.9 mb)
ESM 1 (DOC 8104 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of ScienceShenyang University of TechnologyShenyangChina
  2. 2.Department of Advanced EngineeringMuroran Institute of TechnologyMuroranJapan

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