Studies Of The Recovery Of Iron Ions From The Waste Acid And The Preparation Of Nano-fe₃o₄ By Co-precipitation

Nano Fe₃O₄ not only has large surface area, the advantages of magnetic intensity, but also low cost, readily available raw materials, thus becoming the main force of nano-materials applications, the magnetic fluid, bio-medical materials, information materials, absorbing materials areas have a wide range of applications. Because of its performance advantages and applications of a wide range of iron oxide nano-4 has become the focus of many scholars, its preparation process has also become one of the focus naturally.On the treatment of waste acid in the metal there are many, but use of resin on the waste acid in the metal for recycling, it is a device that is simple, convenient, economical way to have some. The method uses ion exchange resin functional groups and the exchange of impurity ions in solution, differences in analytic ability to achieve separation.In this thesis, from the Industrial Waste in the recovery of iron as raw materials, using principles of co-precipitation cycle in submerged impinging stream reactor Preparation of Nano Fe₃O₄. Iron ions on the recovery of waste acid, this study focused on the different conditions of iron ion adsorption resin exchange resin, the desorption efficiency and regeneration efficiency. First, the static experiment, the temperature, pH, desorption agent under the conditions of the concentration of waste acid resin on the adsorption of iron ion exchange regeneration efficiency and desorption, and then use the static parameters of experimental conditions provided by the resin under different flow rate Regeneration of the adsorption and desorption exchange for dynamic contrast experiments, the final process to determine the best conditions. Recovered from the waste acid using iron will of which the proportion of Fe²⁺ and Fe³⁺ as the experiment after appropriate adjustment Fe₃O₄ nano raw materials. Experiment focuses on the impact the process flow of the optimal conditions for precipitation, respectively, reaction temperature, Fe²⁺ and Fe³⁺ ratio, rotor speed and reaction end point of the pH value as the orthogonal factor orthogonal experiment to study its precipitation average particle size impact to determine the optimum conditions for preparation.