Adsorption Performances of an Acid-stable 2D Covalent Organic Framework towards Palladium(II) in Simulated High-level Liquid Waste

An acid-stable 2D covalent organic framework (COF TpPa-1) was synthesized by a reversible Schiff-base reaction and the following irreversible enol-keto tautomerism. The adsorption behaviors of COF TpPa-1 towards Pd(II) in simulated highlevel liquid waste (HLLW) were investigated under the effect of contact time, the concentration of nitric acid etc. The obtained experimental results supported that the utilization of this type of acid-stable COF in HLLW to recover metal ion was feasible.

Automated summary

An acid-stable 2D covalent organic framework (COF TpPa-1) was synthesized through reversible Schiff-base reaction and irreversible enol-keto tautomerism, and its adsorption behavior towards Pd(II) in simulated high-level liquid waste (HLLW) was investigated. The experimental results supported the feasibility of using this type of acid-stable COF in HLLW for metal ion recovery.