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

• 作 者: Yawei Shi Wei Zheng Hao Liu Liang Wang Hongwei Zhang
• 机 构: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University,
• 出 处: 中国化学工程学报（英文版）
• 发表日期: 2019年10期
• 关键词: Protein Porous carbon Heteroatoms Adsorption Heavy metal Waste water

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 commer-cial 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.