Adsorption of radionuclide thorium by graphene oxide aerogels from aqueous solution / 中华放射医学与防护杂志

ABSTRACT

Objective:To study the characteristics of thorium adsorption onto graphene oxide aerogel (GO-A).Method:GO-A was prepared using hydrothermal reduction assembly method and characterized using scanning electron microscopy (SEM) and Fourier infrared spectroscopy (FT-IR) to investigate its adsorption performance, including the effects of solution pH, adsorption time, initial thorium concentration, and temperature.Results:The maximum adsorption capacity of thorium onto GO-A was 85.8 mg/g under the experimental conditions of pH 3.0, GO-A 20 mg, solution volume 25 ml, and oscillation for 4 h at 25℃.Conclusions:The preparation method of GO-A has a high thorium adsorption capacity owing to being simple, environmental benign, convenient for solid-liquid separation. This result will provide new method and technologies for the treatment of thorium-containing radioactive wastewater and the pre-treatment of samples for environmental monitoring.