Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (10): 2581-2586.doi: 10.1016/j.cjche.2018.11.017

• Materials and Product Engineering • Previous Articles     Next Articles

Protein-derived nitrogen and sulfur co-doped carbon for efficient adsorptive removal of heavy metals

Yawei Shi1,2, Wei Zheng2, Hao Liu2, Liang Wang1,2, Hongwei Zhang1,2   

  1. 1 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China;
    2 School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
  • Received:2018-09-25 Revised:2018-11-01 Online:2019-10-28 Published:2020-01-17
  • Contact: Liang Wang
  • Supported by:
    Supported by the National Natural Science Foundation of China (51638011, 51478314) and the Science and Technology Plans of Tianjin (17PTSYJC00050, 17ZYPTJC00060).

Abstract: A nitrogen and sulfur co-doped carbon has been synthesized employing egg white as a sustainable protein-rich precursor. According to CHNS elemental analysis, N, S and O heteroatoms accounted for mass fractions of 3.66%, 2.28% and 19.29% respectively, and the types of surface functionalities were further characterized by FT-IR and XPS measurements. Although the carbon possessed a smaller surface area (815 m2·g-1) compared to a commercial activated carbon (1100 m2·g-1), its adsorption capacity towards Co2+ reached 320.3 mg·g-1, which was over 8 times higher compared to the limited 34.0 mg·g-1 over the activate carbon. Furthermore, the carbon was found to be an efficient adsorbent towards a series of metal ions including VO2+, Cr3+, Ni2+, Cu2+ and Cd2+. Combined with its environmental merits, the protein derived carbon may be a promising candidate for heavy metal pollution control.

Key words: Protein, Porous carbon, Heteroatoms, Adsorption, Heavy metal, Waste water