Applied Physics A

, 124:398 | Cite as

Fabrication of the tea saponin functionalized reduced graphene oxide for fast adsorptive removal of Cd(II) from water

  • Zhigang Li
  • Zhifeng Liu
  • Zhibin Wu
  • Guangming Zeng
  • Binbin Shao
  • Yujie Liu
  • Yilin Jiang
  • Hua Zhong
  • Yang Liu


A novel graphene-based material of tea saponin functionalized reduced graphene oxide (TS-RGO) was synthesized via a facil thermal method, and it was characterized as the absorbent for Cd(II) removal from aqueous solutions. The factors on adsorption process including solution pH, contact time, initial concentration of Cd(II) and background electrolyte cations were studied to optimize the conditions for maximum adsorption at room temperature. The results indicated that Cd(II) adsorption was strongly dependent on pH and could be strongly affected by background electrolytes and ionic strength. The optimal pH and required equilibrium time was 6.0 and 10 min, respectively. The Cd(II) removal decreased with the presence of background electrolyte cations (Na+ < Ca2+ < Al3+). The adsorption kinetics of Cd(II) followed well with the pseudo-second-order model. The adsorption isotherm fitted well to the Langmuir model, indicating that the adsorption was a monolayer adsorption process occurred on the homogeneous surfaces of TS-RGO. The maximum monolayer adsorption capacity was 127 mg/g at 313 K and pH 6.0. Therefore, the TS-RGO was considered to be a cost-effective and promising material for the removal of Cd(II) from wastewater.



The study was financially supported by the Program for Changjiang Scholars and Innovative Research Team in University (IRT-13R17), the National Natural Science Foundation of China (51679085, 51378192, 51378190, 51521006), the Fundamental Research Funds for the Central Universities of China (531107050930).

Compliance with ethical standards

Conflict of interest

Authors declare that they have no competing interests.

Supplementary material

339_2018_1816_MOESM1_ESM.docx (21 kb)
Supplementary material 1 (DOCX 21 KB)


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Copyright information

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

Authors and Affiliations

  • Zhigang Li
    • 1
  • Zhifeng Liu
    • 1
  • Zhibin Wu
    • 2
  • Guangming Zeng
    • 1
  • Binbin Shao
    • 1
  • Yujie Liu
    • 1
  • Yilin Jiang
    • 1
  • Hua Zhong
    • 1
    • 3
  • Yang Liu
    • 1
  1. 1.College of Environmental Science and EngineeringHunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of EducationChangshaPeople’s Republic of China
  2. 2.College of Bioscience and BiotechnologyHunan Agricultural UniversityChangshaPeople’s Republic of China
  3. 3.State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhanPeople’s Republic of China

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