▎ 摘　　要

Functionalized graphene oxide was an important candidate for removing heavy metal pollution. However, its difficult separation, low mechanical strength, and secondary pollution were restricted. In our study, polyvinyl alcohol/functionalized graphene oxide macroporous composite spheres (PVA/GO-SH) were prepared by wrapping sulfhydryl-functionalized graphene oxide (GO-SH) in polyvinyl alcohol (PVA) to solve the above problems. The experiments showed that the removal rates of Cu2+ and Pb2+ by 1 g L-1 PVA/GO-SH were 86.59% and 94.7%, and the equilibrium adsorption capacities were 84.42 mg g(-1) and 218.62 mg g(-1), respectively. The isothermal equation calculation showed that the adsorption was monomolecular layer adsorption. Kinetic and thermodynamic results showed that adsorption follows a second-order reaction kinetic model, and the more high temperature, the more favorable the adsorption. At a flow rate of 2.0 mL min(-1), 80 mg L-1 of Cu2+ solution, and 100 mg L-1 of Pb2+ solution could be adsorbed entirely, with volumes of 1960 mL and 2480 mL, respectively. After five adsorption-desorption cycles, the adsorption rate achieved more than 75% of the initial adsorption rate. The composite sphere maintained an excellent spherical shape without damage, which had good stability. In conclusion, PVA/GO-SH has potential practical value.