Study On Preparation Of Zirconium Hydroxide Nano-particles And Adsorption Of Sulfate Radical

Sulfate radical, a common anion in inorganic chemical industry, can result in a bad impact on the production of several basic chemical materials, such as refined salt. Also, sulfate radical with a high concentration may break the sulfur cycle balance in the nature. Therefore, it is necessary to develop a new advanced and economical sulfate radical removal technology. Recently, some new technologies have been introduced to sulfate radical removal projects, in which the ion-exchanging technology is most attractive. And the zirconium hydroxide has a good promise to be an industrial adsorbent.Using ZrOCl2?2H2O and ammonia as precursors, the zirconium hydroxide nanoparticles were prepared with sol-gel method and ultrasonic dispersion technology. By employing BET, TG, TEM and HRTEM, the influence on their specific areas from different preparation factors, including reaction temperatures, supersonic parameters, aging and drying conditions, have been investigated systematically. The experimental results indicate that, with sol-gel method, amorphous zirconium hydroxide nanoparticles piled by several plate-like molecular clusters with a thickness of about 4nm have been successfully prepared. The change of ultrasonic dispersion, aging conditions, reaction temperatures, and drying temperatures will influence the size, distribution, and specific surface areas of zirconium hydroxide nanoparticles. The optimal preparation conditions are as follows: reaction temperature is 60℃; the ultrasonic pulse period is 1:1 and treatment time is 15 min; aging temperature is 60℃while the treatment time is 30 min; drying temperature is 100℃; ethanol washing should be utilized.The self-prepared zirconium hydroxide nanoparticles inorganic adsorbents are used to adsorb the sulfate radical with the static adsorption method. By characterizing samples with IR, XPS and analyzing the concentration of sulfate radical with weight analysis method, the affects from different factors, such as the concentrations of Na2SO4 solution and of other anion in it, have been investigated. Meanwhile, after...