Dong, Zhen; Liu, Junzi; Wen, Di; Zhai, Maolin; Zhao, Long published the artcile< Aminomethylpyridine isomers functionalized cellulose microspheres for TcO-4/ReO-4 uptake: Structure-properties relationship and their application in different aquatic systems>, Safety of Pyridin-4-ylmethanamine, the main research area is cellulose aminomethylpyridine isomer technetium rhenium oxide adsorption; (99)Tc; Adsorption mechanism; ReO(4)(-); Removal; Structure-properties relationship.
Technetium-99 (99Tc) is a long-lived radioactive nuclide that poses great threat to environment, hence selective removal of 99Tc from aquatic system is always an issue. Aminomethylpyridine (AMP) equipped with pyridine and amino, is a promising receptor for TcO4- and its surrogate ReO4-, thus it is of interest to explore and understand the structure-properties relationship of ReO4- adsorption related to n-AMP structure that differ in amino Me position. In this work, three n-AMP functionalized cellulose microspheres (n-AMPR, n = 2, 3, 4) were synthesized and employed for TcO4-/ReO4- uptake. The effect of aminomethyl position on adsorption properties of n-AMPR for ReO4- were investigated and compared. Adsorption kinetics and adsorption isotherm showed that adsorption speed and adsorption capacity were in order of 3-AMPR > 2-AMPR > 4-AMPR. DFT calculation verified that the adsorption of ReO4- by n-AMPR was attributed to electrostatic interaction and hydrogen bonding interaction, the order of adsorption abilities of n-AMPR was due to that steric effect and hydrogen bond collaborated in stabilizing n-AMPR-ReO4- complexes. The column experiments demonstrated that 3-AMPR can be selectively remove ReO4- from simulated groundwater. More importantly, 99Tc column experiments showed that 3-AMPR had a better ability for actual radioactive TcO4-.
Journal of Hazardous Materials published new progress about Adsorption. 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Safety of Pyridin-4-ylmethanamine.