The technologies of ion exchange resin for ultra pure hydrogen peroxide production are more and more focused. The aim of this research was to determine suitable parameters for effective removal of Na+ impurities from aqueous hydrogen peroxide solution to produce ultra pure hydrogen peroxide. Dynamic experiments for the different operation conditions, i.e., initial concentration, flow rate, ratio of height to diameter were carried out. The concentrations of Na+ of the effluents from the ion exchange resin column were determined by ICPS-7510.The breakthrough curves of Na+ were measured and analyzed. The results shown that Na+ could be reduced effectively from the experimental aqueous hydrogen peroxide solution with the fitting conditions of ion exchange resin column, which provided the basis for determining of the suitable operating conditions of ion exchange column of a pilot plant.

A biogenic synthesis of silver nanoparticles (AgNPs) was achieved using pomegranate peel polyphenols in this article. The formation of AgNPs was confirmed by UV-vis spectrum and TEM image. The biogenic AgNPs showed Surface Plasmon Resonance (SPR) peak at 433nm as shown from the UV-vis absorption spectrum. The average diameter of AgNPs was around 26nm, which was testified by the particle size distribution analysis. The biogenic AgNPs were utilized for the catalytic reduction of Acid Red 6, and the green synthesized AgNPs showed high catalytic activity on Acid Red 6 reduction in the presence of NaBH 4. The present study has brought to a novel method for the reduction of hazardous dyes in the liquid phase.

The technologies of ion exchange resin for ultra pure hydrogen peroxide production are more and more focused.The aim of this research was to select suitable parmeters for effective removal of P ion impurities from the experimetal aqueous hydrogen peroxide solution to produce ultra-pure hydrogen peroxide. Dynamic experiments for the different operation conditions, i.e., initial concentrations, flow rates, ratios of height to diameter were carried out. The concentrations of P anion of the effluent samples from the anion exchange resin column were determined by ICPS-7510.The breakthrough curves of P ion were measured and analyzed. The results showed that P ion could be reduced effectively from the experimetal aqueous hydrogen peroxide solution with the fitting conditions of ion exchange resin column, It provided the basis for determining of the suitable operating conditions of ion exchange column of commercial plant.

Abstract. In the present study, the silver nanoparticles (AgNPs) were biosynthesized using tea polyphenols in the silver nitrate solution. The tea polyphenols, which was extracted from the green tea leaves, acted as both reducing (from Ag + to Ag 0 ) and capping agent in the liquid phase. The synthesized AgNPs were characterized with UV-visible absorption spectrum, TEM, EDS spectrum and particles size distribution analysis. UV-visible absorption spectrum indicated a significant absorption peak at 425 nm related to the great synthesis of AgNPs in the aqueous solution. TEM images show the diameter of well dispersed AgNPs was around 28nm. The important parameters including pH value, silver nitrate concentration and temperature affected the synthetic reaction of AgNPs significantly. The AgNPs showed excellent catalytic activity in the degradation of Acid Violet 7 by NaBH 4 , and more than 97% Acid Violet 7 was degraded within 18 minutes.