مشخصات پژوهش

Inthiswork,thegraftingof acrylamideontoCMCwasperformedbyafreeradicalpolymerizationmethodto preparehydrogelfortheeliminationofsingleandsimultaneousmethyleneblue(MB)andmethylviolet(MV)-as commontexturaldyes-fromwater.Biochar(CL)andmagneticbiocharofLuffaCylindrica(CL-Fe3O4)wereintegratedintothehydrogelmatrixtopromoteremovalperformance.CLwaspreparedusingthepyrolysismethod andmodified usingFe3O4 magneticnanoparticlesbyaco-precipitationmethod.Infraredspectroscopy(FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and vibration sample magnetometry (VSM) analysiswereappliedtocharacterizepreparedadsorbents.ThemaximumremovalofsingleMBandMVoccurred atapHof9,temperatureof25 ◦C,adsorbentdoseof1.5g/L,initialconcentrationof10mg/L,andcontacttime of60min.Themaximumremovalefficiencyundertheoptimalconditionswasdeterminedtobe83.11,92.89and 95.01% for single adsorption of MB, 76.09, 85.91 and 90.11% for single adsorption of MV, 66.96, 76.48 and 80.02%forsimultaneousadsorptionofMBand60.04,69.91and75.28%forsimultaneousadsorptionofMVby CMC-g-poly(AAm), CMC-g-poly(AAm)/CL, and CMC-g-poly(AAm)/CL-Fe3O4, respectively. The kinetic and isothermstudiesrevealedthatthepseudo-second-orderkineticmodelandtheLangmuirisothermmodelaligned more with the experimental data. Thermodynamic studies showed that the adsorption of dyes takes place spontaneously and exothermically. Therefore, CMC-g-poly(AAm)/CL-Fe3O4 nanocomposite hydrogel could be usedforwastewatertreatmentapplications.