Ultrahigh Water Permeance of Reduced Graphene Oxide Membrane for Radioactive Liquid Waste Treatment
Xinming Xia,
Feng Zhou,
Risheng Yu,
Longsheng Cao,
Liang Chen
Affiliations
Xinming Xia
Department of Optical Engineering, Zhejiang Province Key Laboratory Carbon Cycling Forest Ecosy, Zhejiang A&F University, Hangzhou 311300, China
Feng Zhou
Radiation Monitoring Technical Center of Ministry of Ecology and Environment, Key Laboratory of Radiation Environmental Safety Monitoring of Zhejiang Province, State Environmental Protection Key Laboratory of Radiation Environmental Monitoring, Hangzhou 310012, China
Risheng Yu
Department of Optical Engineering, Zhejiang Province Key Laboratory Carbon Cycling Forest Ecosy, Zhejiang A&F University, Hangzhou 311300, China
Longsheng Cao
Radiation Monitoring Technical Center of Ministry of Ecology and Environment, Key Laboratory of Radiation Environmental Safety Monitoring of Zhejiang Province, State Environmental Protection Key Laboratory of Radiation Environmental Monitoring, Hangzhou 310012, China
Liang Chen
Department of Optical Engineering, Zhejiang Province Key Laboratory Carbon Cycling Forest Ecosy, Zhejiang A&F University, Hangzhou 311300, China
Membrane methods exhibit great potential for application in radioactive liquid waste treatment. In this work, we prepared a reduced graphene oxide using the amino-hydrothermal method (AH-rGO) that exhibited effective rejection rates of 99.9% for CoCl2, ZnCl2, NiCl2, and radionuclide 60Co solutions with an ultrahigh water permeance of >71.9 L m−2 h−1 bar−1. The thickness of the AH-rGO membranes affects the water permeance, as the membrane with a thickness of ≈250 nm has the highest water permeance of up to 125.1 L m−2 h−1 bar−1 with the corresponding rejection rate of 86.8%. Importantly, this is the most permeable membrane with a satisfactory level of the rejection rate for typical radioactive ions of Co2+, Zn2+, and Ni2+. Moreover, the AH-rGO membranes presented excellent stability. These findings demonstrate the potential of reduced graphene oxide (rGO) membranes for radioactive liquid waste treatment.
