Study On Controllable Preparation Of Hierarchical Porous Microparticles And Adsorption Properties For Water Decontamination

Environmental security is a measure of the degree of harmony between humans and the environment.Today,when the conflicts between humans and the environment are gradually increasing,environmental security has become a huge issue threatening the survival of mankind.As environmental safety issues become more and more serious,advances in water pollution treatment technology can greatly alleviate serious environmental pollution problems.Generally,industrial wastewater is rich in toxic heavy metals and organic pollutants.Because of its non-degradable,easily enriched,and toxic characteristics,it seriously endangers human health and the ecological environment for living.Therefore,how to effectively remove heavy metal pollutants in water and organic pollution has become a key issue in the field of safety and environmental protection.With the rapid development of nanotechnology,due to its small size and large specific surface area,porous structured functional microparticle materials have a wide range of applications in many fields such as adsorption separation,controlled drug release,energy storage,catalytic reaction,tissue engineering,analysis and monitoring,etc.Application;At the same time,functional microparticles with porous structure can also separate toxic heavy metal ions and organic pollutants in wastewater through the principle of adsorption,providing a new method for the treatment of water pollutants.allenge.Based on research at home and abroad,this thesis intends to prepare porous magnetic Si O₂ microparticles by microfluidic emulsion template technology,and further construct the hierarchical porous structure magnetic Si O₂ microparticles with different sizes of micron/nano-scale through internal structure design;The metal chelating agent is used to modify the microparticles,and the adsorption and separation performance of the porous magnetic Si O₂ microparticles for heavy metal ions（lead ions）in water is studied,and the adsorption performance of heavy metal ions in water is improved.At the same time,by changing the flow rate ratio of the internal and external phases and the ratio of water and oil in the internal phase to design hierarchical porous structure magnetic Si O₂ microparticles of different sizes and different structures,using methylene blue solution as a model pollutant,the size and internal structure of the microparticles were studied.The effect of adsorption and separation performance of organic pollutants in water.In summary,this article combines the advantages of traditional adsorption materials with the advantages of microfluidic technology,and cleverly designed magnetic Si O₂ microparticles with nanometer/micrometer porous structure;this particle not only provides a large specific surface area of nanometer In addition to the graded pore structure,a micrometer-sized pore structure with smaller mass transfer resistance is provided to enhance the mass transfer process inside the microparticles,thereby achieving the enhancement of the adsorption performance of dye pollutants and heavy metal ions in the water.This research can provide an effective strategy for the preparation of adsorbents that adsorb and separate pollutants in wastewater in the treatment of environmentally safe water pollution in the future.