Preparation of Graphene Oxide Composites and Assessment of Their Adsorption Properties for Lanthanum (III)

In this study, graphene oxide (GO) was prepared using the improved Hummers’ method, and GO carboxylated modified into hydroxylated (GOH). Diatomaceous earth (DE), which exhibits stable chemical properties, a large specific surface area, high porosity, as well chitosan/magnetic chitosan, loaded by solution blending. Subsequently, oxide/diatomite/chitosan (GOH/DCS) oxide/diatomite/magnetic chitosan (GOH/DMCS) composites were through simple solid–liquid separation. The results showed that GOH/DCS GOH/DMCS could be used to remove lanthanum La(III)), is rare element. Different factors, such initial concentration, pH of solution, adsorbent dosage, adsorption contact time, reaction temperature, on adsorption, studied, mechanism explored. An adsorption–desorption recycling experiment also evaluate performance composite material. show at concentration 50 mg·g?1, = 8.0, 3 g·L?1 temperature 45 °C, time min, effect best. process more in line with pseudo-second-order kinetic model Langmuir model, internal diffusion not only controlling effect. an endothermic spontaneous process. maximum capacity for La(III) 308K 302.51 mg/g simulation. After four cycles, initially exceeded 74%. So, can reusable efficient adsorbent.