β-Cyclodextrin Modified Molybdenum Disulfide for the Adsorption of Europium

Wastewater contaminated by radionuclides has become a major environmental issue, which is threatening human health. The beta-cyclodextrin modified molybdenum disulfide (beta-CD-MoS2) was studied as an adsorbent for the elimination of europium(Eu) form aqueous solutions. The experimental results showed that the adsorption of Eu(III) on beta-CD-MoS2 relied on pH and temperature. The removal of Eu(III) on the composite was better simulated by the Langmuir model, revealing a monolayer removal process. The adsorption capacity of beta-CD-MoS2 for Eu(III) attained 107.1 mg/g and the retention of Eu(III) was an endothermic process. The surface oxygen-containing functional groups (hydroxyl groups) controlled the retention of Eu(III). The findings presented in this study can offer important information for the elimination of Eu(III) in environmental pollution control.

Automated summary

Wastewater contaminated by radionuclides is a significant environmental concern that poses a threat to human health. In this study, beta-cyclodextrin modified molybdenum disulfide was investigated as an adsorbent to remove europium from aqueous solutions. The experimental results indicated that the adsorption of Europium(III) relied on pH and temperature. The Langmuir model better described the removal process, which was found to be a monolayer adsorption. The adsorption capacity of beta-CD-MoS2 for Europium(III) reached 107.1 mg/g and the adsorption process was endothermic. The surface hydroxyl groups controlled the retention of Europium(III). These findings provide important information for environmental pollution control and the elimination of Europium(III).