, Volume 25, Issue 12, pp 7315–7328 | Cite as

Synthesis of lignocellulose-based composite hydrogel as a novel biosorbent for Cu2+ removal

  • Lili Zhang
  • Hailong Lu
  • Juan Yu
  • Yimin Fan
  • Yiqin Yang
  • Jinxia Ma
  • Zhiguo WangEmail author
Original Paper


A lignocellulose-based composite hydrogel, as a novel biosorbent, was prepared for Cu2+ removal from wastewater. TEMPO-oxidized cellulose nanofibrils (TOCN) were dispersed in a 7 wt% NaOH/12 wt% urea aqueous solution at room temperature. Meanwhile, the dissolved cellulose was obtained in the same system at subzero temperature. The composite hydrogels were prepared by blending the dissolved cellulose solution, TOCN dispersion, and alkali lignin solution in an NaOH/urea aqueous solution. The composite hydrogel exhibits excellent adsorption capacity for heavy metals, which can be attributed to the synergistic effects of physical adsorption (porous 3D structure) and chemical adsorption (active sites: carboxyl and phenolic groups). The maximum amount of adsorbed Cu2+ onto composite hydrogel can reach 541 mg/g, which was achieved after 45 min. The adsorption behavior is well-described by the pseudo-second-order kinetics and the Freundlich model (R2 > 0.999). Furthermore, the composite hydrogel exhibits high-strength properties, indicating that the presence of TOCN and lignin contributes to mechanical improvements.

Graphical abstract


Biosorbent Lignin TOCN Composite hydrogel Copper ion removal 



We are grateful for financial support from National Key R&D Program of China (2017YFD0601005), as well as the National Natural Science Foundation of China (Grant No. 31870565), the Doctorate Fellowship Foundation of Nanjing Forestry University, the Postgraduate Research and Practice Innovation Program of Jiangsu Province (KYCX17_0845) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Supplementary material

10570_2018_2077_MOESM1_ESM.docx (4.4 mb)
Supplementary material 1 (DOCX 4457 kb)


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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjingChina
  2. 2.College of Light Industry and Food EngineeringNanjing Forestry UniversityNanjingChina

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