Open AccessA porous material of cross-linked adenine-polyethylene glycol diglycidyl ether for copper ion adsorption
Author(s) -
Longfei Zhang,
Shuai Zhang,
Cheng Wang,
Wa Li,
Lirong Yang,
Shanggeng Li,
Jiaming Hu,
Lin Zhang
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ac0738
Subject(s) - adsorption , copper , polyethylene glycol , diglycidyl ether , langmuir adsorption model , aqueous solution , chemistry , inorganic chemistry , nickel , materials science , nuclear chemistry , organic chemistry , epoxy , bisphenol a
A porous material (PEA) was prepared by the ring opening polymerization of polyethylene glycol diglycidyl ether with adenine in a simple sol-gel method. The structure and composition of PEA were characterized by SEM, FT-IR, BET and XRD. The adsorption experiments of copper ion by PEA at different pH, temperature, contact time and initial concentration were studied. The results show that the PEA is macroporous, the optimum adsorption pH is 5 and the saturated adsorption time is 180 min. The maximum equilibrium adsorption capacity of copper ion is 80.1 mg g −1 at 40 °C according to the Langmuir model and the competitive adsorption test shows that PEA has good adsorption on copper ion, but low effect on cobalt, cadmium and nickel. The repeated adsorption experiments show that PEA could still adsorb 82% of the first adsorption capacity after 5 times elution. These results indicate that the PEA can be used as a practical adsorbent for copper ion adsorption in aqueous solution.