Adsorption Properties of Calcium Alginate-Silica Dioxide Hybrid Adsorbent to Methylene Blue

  • Junfeng Shi
  • Hong ZhangEmail author
  • Yue YuEmail author
  • Xinquan Zou
  • Weidong Zhou
  • Jing Guo
  • Yongming Ye
  • Yunhe Zhao


Sodium alginate (SA) was used as a raw material to react with the silica (SiO2) which was the alcoholysis product of tetraethyl orthosilicate (TEOS).The SiO2/CA hybrid adsorbent was prepared by ion exchange method. The chemical structure and microstructure of the adsorbent were tested by Fourier transform infrared spectroscopy and scanning electron microscopy. The effects of raw material ratio, Ca2+ concentration, pH value, adsorbent dosage, temperature, adsorption time and initial dye concentration on the adsorption of methylene blue (MB) were investigated. At the same time, this experiment also carried out multiple adsorption/desorption cycles on the adsorption of MB by SiO2/CA, and studied its reusability. The results showed that when the MB concentration was 100 mg/L, mass ratio of SA to TEOS was 1:3, Ca2+ was 2% (w/v), amount of adsorbent was 0.2 g, pH was 5, and temperature was 35 °C, the mixed adsorbent has the best adsorption capacity to MB and the removal rate reached 94.9%. At the same time, the adsorption kinetics study shows that the quasi-first-order kinetic model can be better fitting the experimental data. The Langmuir isotherm model has a good correlation with MB adsorption, and the maximum capacity obtained by simulation is 1158.332 mg/g. Thermodynamic studies show that the adsorption process of SiO2/CA on MB is a spontaneous endothermic process driven by entropy. In addition, after five adsorption/desorption cycles, the removal rate of the adsorbent was maintained at about 85%, indicating that it can be reused.


Calcium alginate Silica dioxide Hybrid adsorbent Methylene blue 



This work was supported by the National Natural Science Foundation of China (Grant Number: 51773024), Education Basic Research Project of Liaoning Provincial Department (Grant Numbers: J2019018 and 2017J038), Dalian Science and Technology Innovation Fund Project (Grant Number: 2019J12GX047) and Major Project of Higher Education Industry Technology Research Institute of Liaoning Province (Grant Number: 2018LY010).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Junfeng Shi
    • 1
  • Hong Zhang
    • 1
    • 2
    Email author
  • Yue Yu
    • 1
    • 2
    Email author
  • Xinquan Zou
    • 1
    • 2
  • Weidong Zhou
    • 1
    • 2
  • Jing Guo
    • 1
    • 2
  • Yongming Ye
    • 1
    • 2
  • Yunhe Zhao
    • 1
    • 2
  1. 1.School of Textile & Materials EngineeringDalian Polytechnic UniversityDalianChina
  2. 2.Functional Fiber and Composite Materials in Liaoning Province Engineering Research CenterDalianChina

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