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Highest and Fastest Removal Rate of Pb II Ions through Rational Functionalized Decoration of a Metal–Organic Framework Cavity
Author(s) -
Afshariazar Farzaneh,
Morsali Ali,
Wang Jun,
Junk Peter C.
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201904436
Subject(s) - adsorption , chemistry , chelation , metal ions in aqueous solution , ion exchange , metal , aqueous solution , metal organic framework , ion , pyridine , inorganic chemistry , nuclear chemistry , organic chemistry
To overcome the challenge of developing a multipurpose adsorbent for effective removal of toxic and carcinogenic Pb II ions from aqueous solutions, a made‐for‐purpose functional group ( N 1 , N 2 ‐di(pyridine‐4‐yl)oxalamide) was rationally designed and incorporated into the cavities of a Zn metal–organic framework (MOF), namely, TMU‐56. Large enough pore size along with high densities of strong metal chelating sites lead not only to the highest uptake capacity for Pb II ions, but also the fastest removal rate that has ever been reported for functionalized MOFs, occurring in just 20 s. Moreover, high concentrations of lead ions favor the ion exchange reaction, resulting in a high degree of metal exchange. In addition, TMU‐56 can be a practical adsorbent because of its notable performance in the simultaneous removal of several toxic and carcinogenic heavy metals from wastewater, which has rare precedence.