Textile wastewater contains highly toxic,nondegradable,carcinogenic organic pollutants,causing severe damage to the ecological environment.In this work,β-cyclodextrin carbon-sphere-based nanocomposite(CS/SiO_(2)@β-C...Textile wastewater contains highly toxic,nondegradable,carcinogenic organic pollutants,causing severe damage to the ecological environment.In this work,β-cyclodextrin carbon-sphere-based nanocomposite(CS/SiO_(2)@β-CD)with a core-shell-shell configuration was prepared by hydrothermal synthesis and subsequent sedimentation-azeotropic distillation with SiO_(2)as intermediate layer for the removal of crystal violet(CV)and bisphenol A(BPA).The chemical structure and morphology of the CS/SiO_(2)@β-CD were characterized by FT-IR,SEM and TEM.The effects of contact time,pH,temperature and initial concentration of the absorbates on the adsorption property were explored.The CS/SiO_(2)@β-CD showed excellent adsorption capacity on CV and BPA,and the maximum adsorption capacity was 87.873 mg g^(-1)and 165.095 mg g^(-1),respectively.Their adsorption process was in line with the pseudo-second-order and pseudo-first-order kinetic models,respectively.The adsorption thermodynamics could be better fitted by Langmuir model than by Freundlich model.The calculated thermodynamic parameters(-ΔG0,ΔS0 andΔH0)illustrated the adsorption of CV was endothermic,in contrast,the adsorption of BPA was exothermic process.Furthermore,the CS/SiO_(2)@β-CD showed excellent recovery performance,making it a potential adsorbent for the practical treatment of textile wastewater.展开更多
基金We sincerely appreciate the supports of the National Natural Science Foundation of China(Key Program U20A20140)the Open Foundation of State Key Laboratory of Chemical Engineering(No.SKL-ChE-20B06).
文摘Textile wastewater contains highly toxic,nondegradable,carcinogenic organic pollutants,causing severe damage to the ecological environment.In this work,β-cyclodextrin carbon-sphere-based nanocomposite(CS/SiO_(2)@β-CD)with a core-shell-shell configuration was prepared by hydrothermal synthesis and subsequent sedimentation-azeotropic distillation with SiO_(2)as intermediate layer for the removal of crystal violet(CV)and bisphenol A(BPA).The chemical structure and morphology of the CS/SiO_(2)@β-CD were characterized by FT-IR,SEM and TEM.The effects of contact time,pH,temperature and initial concentration of the absorbates on the adsorption property were explored.The CS/SiO_(2)@β-CD showed excellent adsorption capacity on CV and BPA,and the maximum adsorption capacity was 87.873 mg g^(-1)and 165.095 mg g^(-1),respectively.Their adsorption process was in line with the pseudo-second-order and pseudo-first-order kinetic models,respectively.The adsorption thermodynamics could be better fitted by Langmuir model than by Freundlich model.The calculated thermodynamic parameters(-ΔG0,ΔS0 andΔH0)illustrated the adsorption of CV was endothermic,in contrast,the adsorption of BPA was exothermic process.Furthermore,the CS/SiO_(2)@β-CD showed excellent recovery performance,making it a potential adsorbent for the practical treatment of textile wastewater.
