Highly efficient removal of Cu(ii) by novel dendritic polyamine-pyridine-grafted chitosan beads from complicated salty and acidic wastewaters.

ABSTRACT: In this study, dendritic polyamine chitosan beads with and without 2-aminomethyl pyridine were facilely prepared and characterized. Compared to CN (without the pyridine function), more adsorption active sites, larger pores, higher nitrogen content, higher specific surface area, and higher strength could be obtained for CNP (with the pyridine function). CNP microspheres afforded a larger adsorption capacity than those obtained by CN for different pH values; further, the uptake amounts of Cu(ii) were 0.84 and 1.12 mmol g^-1 for CN and CNP beads, respectively, at pH 5. The CNP microspheres could scavenge Cu(ii) from highly acidic and salty solutions: the maximum simulated uptake amount of 1.93 mmol g^-1 at pH 5 could be achieved. Due to the strong bonding ability and weakl

SUBMITTER: Wang LL 

PROVIDER: S-EPMC9054208 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature