Open AccessAdsorption behavior and mechanism on U(VI) from aqueous solutions by polydopamine-modified titanate nanotubes
Author(s) -
Yangyang Zuo,
Ye Li,
Jianwen Hu,
Shuang Liu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/651/4/042021
Subject(s) - adsorption , titanate , aqueous solution , chemical engineering , polymerization , sorbent , ion exchange , materials science , chemistry , ion , polymer , organic chemistry , ceramic , engineering
In this work, uniform polydopamine (PDA) layers by self-polymerization of dopamine were successfully coated around titanate nanotubes (TNTs) to enhance its adsorption ability. The polydopamine-functionalized titanate nanotubes (PDA-TNTs) exhibited outstanding U(VI) adsorption capacity (247.53 mg/g) and rapid adsorption efficiency. The nitrogenous groups and phenolic hydroxyl groups of PDA coordinating with UO2 2+ was dominant, while ion exchange between Na + /H + and U(VI) was of secondary importance. Besides, the introduction of PDA significantly alleviated the competitive adsorption between U(VI) and coexisting metal ions, making it possible for PDA-TNTs to be an effective sorbent to remove U(VI) in radioactive wastewater.