The purpose of this study is to explore the adsorption performance of meso-2,3-dimercaptosuccinic acid(DMSA)modified Fe3O4@SiO2 magnetic nanocomposite(Fe3O4@SiO2@DMSA)for Pb2+ions removal from aqueous solutions.The ef...The purpose of this study is to explore the adsorption performance of meso-2,3-dimercaptosuccinic acid(DMSA)modified Fe3O4@SiO2 magnetic nanocomposite(Fe3O4@SiO2@DMSA)for Pb2+ions removal from aqueous solutions.The effects of solution pH,initial concentration of Pb2+ions,contact time,and temperature on the amount of Pb2+adsorbed were investigated.Adsorption isotherms,adsorption kinetics,and thermodynamic analysis were also studied.The results showed that the maximum adsorption capacity of the Fe3O4@SiO2@DMSA composite is 50.5 mg/g at 298 K,which is higher than that of Fe3O4 and Fe3O4@SiO2 magnetic nanoparticles.The adsorption process agreed well with Langmuir adsorption isotherm models and pseudo second-order kinetics.The thermodynamic analysis revealed that the adsorption was spontaneous,endothermic and energetically driven in nature.展开更多
Core/shell type acrylic-polyurethane hybrid microemulsions in which polyurethaneas the shell and acrylic polymer as the core were prepared successfully. Different cross-link-ing structures between core and shell can b...Core/shell type acrylic-polyurethane hybrid microemulsions in which polyurethaneas the shell and acrylic polymer as the core were prepared successfully. Different cross-link-ing structures between core and shell can be formed by introducing hydroethyl acrylate andadipoyl dihydrazine at the ends of the polyurethane chains. The photon correlation spec-troscopy studies revealed that the mean particle size of the emulsions were smaller than 200nm. The particle morphology results revealed the core/shell structure of the uncross-linkingtype microemulsions and interpenetrating networks of the cross-linking type microemulsions.展开更多
基金Project(2013DFA51290)supported by International S&T Cooperation Program of China
文摘The purpose of this study is to explore the adsorption performance of meso-2,3-dimercaptosuccinic acid(DMSA)modified Fe3O4@SiO2 magnetic nanocomposite(Fe3O4@SiO2@DMSA)for Pb2+ions removal from aqueous solutions.The effects of solution pH,initial concentration of Pb2+ions,contact time,and temperature on the amount of Pb2+adsorbed were investigated.Adsorption isotherms,adsorption kinetics,and thermodynamic analysis were also studied.The results showed that the maximum adsorption capacity of the Fe3O4@SiO2@DMSA composite is 50.5 mg/g at 298 K,which is higher than that of Fe3O4 and Fe3O4@SiO2 magnetic nanoparticles.The adsorption process agreed well with Langmuir adsorption isotherm models and pseudo second-order kinetics.The thermodynamic analysis revealed that the adsorption was spontaneous,endothermic and energetically driven in nature.
文摘Core/shell type acrylic-polyurethane hybrid microemulsions in which polyurethaneas the shell and acrylic polymer as the core were prepared successfully. Different cross-link-ing structures between core and shell can be formed by introducing hydroethyl acrylate andadipoyl dihydrazine at the ends of the polyurethane chains. The photon correlation spec-troscopy studies revealed that the mean particle size of the emulsions were smaller than 200nm. The particle morphology results revealed the core/shell structure of the uncross-linkingtype microemulsions and interpenetrating networks of the cross-linking type microemulsions.
