Research on the Interfacial Bonding Performance of Flame Retardant Polyurethane External Wall Insulation Board
A tailings pond of a certain lead-zinc beneficiation enterprise in China is selected as the research area,the comprehensive wastewater is collected from the tailings pond and used as the wastewater sample after treatment.The magnetized modified diatomaceous adsorbents and magne-tized modified activated carbon adsorbents are prepared.The electron microscopy images,specific surface area,pore size and XRD patterns of the two kinds of magnetic modified adsorbents are obtained through scanning electron microscopy,high-performance specific surface area pore size analyzer and X-ray diffraction instrument,and the magnetic properties of the adsorbents are analyzed.Then,by adding magnetized modified adsorbents to the wastewater samples,the pollutant content before and after adsorption treatment of ore dressing wastewater is measured and compared,and the applica-tion effect of magnetized modified adsorbents in the purification and utilization of pollutants in ore dressing wastewater is analyzed and verified.After experimental analysis,it is found that the specific surface area of the magnetized diatomaceous adsorbent increases by 21.023 m2/g compared to that of the activated carbon adsorbent.After magnetic modification,the pore size of diatomaceous earth decreases from 11.901 nm to 10.009 nm with a higher mesopore ratio and multiple diffraction peaks.This enables magnetic elements to successfully deposit on the surface of diatomaceous earth and acti-vated carbon,obtaining more magnetism;For the pollution of mineral processing wastewater,magnetic modified diatomaceous adsorbents and magnetic modified activated carbon adsorbents have the most significant purification effects on Cu and Pb.The reduction of Cu pollution from 1.02 mg·L-1 to 0.04 mg·L-1 and Pb pollution from 9.15 mg·L-1 to 0.31 mg·L-1 can provide effective support and guarantee for the purification and utilization of min-eral processing wastewater.
magnetic modificationadsorbentmineral processing wastewaterpollutant purificationdiatomaceous earth natural soilactivated carbon
万方数据
维普
