Synthesis of a new porous graphene oxide framework (GOF) for high- performance ultrasonic-assisted removal of cadmium and lead ions from aqueous solution

A novel chelating adsorbent was successfully synthesized by cross-linking of 4, 4', 4"-s-triazine-1, 3, 5-triyltri-p-aminobenzoic acid as a linker with nanosheets graphene oxide to provide 3-dimensional framework. Therefore, the adsorption process Cd2+ and Pb2+ on investigated employing an ultrasonic bath. The optimum condition containing small amount (10 mg) for both metals at pH=8 pH=5 Pb2+, short time two minutes caused gaining absorption capacity high level. presence nitrogen-functionalized groups in porous framework (GOF) contributed lead cadmium ions. To define kinetic models pseudo-first-order pseudo-second-order were used. experimental datum properly-suited model (R2=0.99). It indicated that adsorbing ions heavy onto GOF happens through chemical isotherms high-grade accordance Longmuir model. Eventually, because rapid kinetics, removing, perfect stability, being reusable, this can be used remediation high-performing removal from aqueous solutions.