Adsorption Performance of Cu(Ⅱ)on Molybdenum Disulfide Nanosheets with Wide Interlayer Spacing
MoS2 nanosheets with wide interlayer spacing(W-MoS2)were synthesized via hydrothermal reaction and used for the removal of ionic Cu and complex Cu from water.The experimental results showed that W-MoS2 achieved excellent adsorption capacities on copper ions(Cu2+),Citrate-Cu,and EDTA-Cu in water,and its adsorption isotherm were described by the Langmuir model.The maximum calculated adsorption capacities of Cu2+,Citrate-Cu,and EDTA-Cu were 55.71,23.45,and 9.72 mg/g,respectively.The adsorption of Cu2+onto MoS2 reached equilibrium within 90 min,while the adsorption of Citrate-Cu and EDTA-Cu on MoS2 reached equilibrium within 240 min.The adsorption kinetics followed the pseudo-second-model.In addition,MoS2 showed excellent selectivity for all three forms of Cu(Ⅱ).XPS and FTIR analysis indicated that the adsorption mechanism of Cu2+,Citrate-Cu,and EDTA-Cu on W-MoS2 is the coordination reaction between the abundant S group and Cu on the surface.This study offers a technical reference for removing various forms of Cu(Ⅱ)from wastewater using MoS2 nanomaterials.
Molybdenum disulfideAdsorptionHeavy metal Cu(Ⅱ)Water treatment
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