Research On Controllable Preparation And Adsorption Property Of The Microspheres With Core-shell Structure

With the rapid development of industry,the pollution and treatment of printing and dyeing wastewater has been an important environmental protection problem to be solved in the development of textile and printing industries.In this study,adsorbent mineral-based mesoporous microsphere?MBMM?was successfully prepared by means of pinkering emulsion polymerization with stearyl trimethyl ammonium chloride?STAC?modified montmorillonite?Mt?as core material and methacryloxy propyl trimethoxyl silane?KH570?modified Si O₂ nanospheres as shell materials.Polystyrene-graphere oxide?Pst-Go?was successfully prepared by pinkering emulsion polymerization with polystyrene as core material and graphere oxide?Go?nanoparticles as shell materials.The general preparation methods of two kinds of microspheres are proposed.The MBMM and Pst-Go were characterized by SEM,EDS,FTIR,TEM,XRD,BET,Zeta potential and conductivity,and contact angle,and the adsorption properties of rhodamine b?Rh B?and methylene blue?MB?were also investigated.The test results show that:under the optimum conditions,the maximum adsorption capacity of MBMM to Rh B and MB was 57.79 mg·g^-1 and 55.94 mg·g^-1and for Pst-Go it was 49.70 mg·g^-1 and 59.07 mg·g^-1,respectively.The two adsorbents overcome the disadvantage of difficult separation and easy agglomeration of Mt and Go in water.Thermodynamic analysis shows that their adsorption reaction for Rh B and MB is endothermic reaction.Raising temperature is beneficial to the adsorption reaction.The adsorption behavior of Rh B and MB by MBMM followed Langmuir model and pseudo-first-order-dynamics model.The adsorption behavior of Rh B and MB by Pst-Go conforms to Langmuir model and pseudo-second-order-dynamics model.