Acylamino functionalized triazine-based porous organic polymers for efficient Cd2+ capture

Functionalized porous organic polymers (POPs) with high Brunauer-Emmett-Teller surface area (S-BET) are promising for the removal of heavy metals while their synthesis remains a challenge. A kind of acylamino functionalized triazine-based POPs was developed from melamine and trimesic acid by one-pot polycondensation in this study. The resultant polymers were applied for Cd2+ removal from aqueous solution. These polymers had controllable S-BET of 246-463 m(2)/g with the predominant mesoporous distribution. Due to their well-constructed porosity and plentiful acylamino groups, they were efficient for Cd2+ removal with the maximum capacity of 392.5 mg/g at pH = 6. The adsorption was very fast and less than 15 min was enough to attain the equilibrium. Analysis of the mechanism revealed that the embedded acylamino and triazine ring played a role due to the strong chelating of the oxygen and nitrogen with Cd2+.