Size as one of important physicochemical properties for graphene oxide (GO) may affect its adsorption and desorption behaviors. To date, there are few reports giving a systematic investigation on this point. In this study, batch experiment was conducted to study the adsorption and desorption of U(VI) on GO with two different size (2–5 µm and 100–300 nm) at different solution chemistry (pH, coexisting ions, humic acid and temperature). Faster adsorption rate and better adsorption capacity were displayed on smaller size GO. Additionally, U(VI) desorption is hysteretic, more so with the smaller size GO. These results showed that GO size played a significant role in determining its adsorption and desorption behavior.

尺寸作为氧化石墨烯（GO）的重要理化性质之一，可能会影响其吸附和解吸行为。迄今为止，很少有报告对这一点进行系统的调查。在这项研究中，进行了批处理实验，研究了在不同溶液化学性质（pH，共存离子，腐殖酸和温度）下，两种尺寸（2–5 µm和100–300 nm）的U（VI）在GO上的吸附和解吸。 ）。在较小尺寸的GO上显示出更快的吸附速率和更好的吸附能力。此外，U（VI）的解吸具有滞后性，GO越小解吸性越强。这些结果表明，GO尺寸在决定其吸附和解吸行为中起着重要作用。