Adsorption of uranium(VI) from aqueous solution by phosphorylated luffa rattan activated carbon

Phosphorylated activated carbon was prepared from silk gourd loofah rattan by phosphoric acid modification. The effect of pH value, original content of uranyl ions, time and temperature on the adsorption of uranium by phosphorylated activated carbon were studied by static experiments. In this paper, the adsorption process was analyzed by thermodynamics, kinetics and isotherm model. The adsorbent was characterized using infrared spectroscopy and scanning electron microscopy. The results showed that the pH of the solution can significantly affect the adsorption performance and the pH value of the best adsorption was 5.0. The adsorption equilibrium time was about 240 min and when the adsorption quantity was 197 mg/g, it reaches the summit, and the pseudo-second-order equation and Langmuir equation were more suitable to describe the adsorption process.

Automated summary

Phosphorylated activated carbon was prepared from silk gourd loofah rattan by phosphoric acid modification, and the adsorption performance was significantly influenced by solution pH, with the optimum pH value for adsorption being 5.0. The adsorption equilibrium time was around 240 minutes, with a peak adsorption quantity of 197 mg/g. The pseudo-second-order equation and Langmuir equation were found to be more suitable for describing the adsorption process.