Study On The Influence Of Electro Adsorption Material On The Performance Of Electric Adsorption

Although fresh water only accounts for 3% of water resources, it almost decides that the survival of all living things and the distribution of life on the earth. With the fresh waster resources shortage and pollution became more critical, the problem become increasingly noticeable. Faced with a crisis of freshwater resources, we mainly deal with the seawater, brackish water desalination and a large number of domestic sewage and industrial wastewater treatment and recycling. In this process, it is very important to remove the salt by electro adsorption.This experiment was based on the metal electrode plates and combined activated carbon fiber as supporting material to form composite material of metal plate and carbon material. By changing the different materials of electrode plates to investigate the effect of materials on the electrical properties of adsorption and explore the electric adsorption properties of different materials. The experiment used self-made traditional plate adsorption electric desalination device such as 304 stainless steel plate, titanium plate and ruthenium iridium coating titanium compound adsorption activated carbon fiber plate respectively. The experiment adopted the factor analysis method to figure out the optimum treatment parameters for different plate materials, tested the adsorption of ammonia and organic matters of different electrode plates and studied on the mechanism and capacity of desalination of different materials electrode plates.The main contents of this thesis are as follows:1. The desalination rates of three different kinds of material plates were tested while the voltage was raged from 1.0V to 3.0V. Control other conditions being equal, the electric adsorption desalination efficiency increased with the voltage increased. Meanwhile, the increased voltage accompanied by side effects resulted in the reduction of desalination efficiency and enhancement of consumption. The optimum voltages of the three different materials electrode plates were gained thorough analyzing and comparing.2. The desalination rates of three different kinds of material plates were tested while the influent electric conductivity was raged from 300uS/cm to 2000uS/cm. Control other conditions being equal, with the influent electric conductivity increased, the adsorption efficiency increased, while the maximum desalination rate had a reduction and the relatively high removal rate time was getting shorter. Thus, the optimum influent conductivities of each material plate were obtained to provide some guidance for the electric adsorption device in practical application with different influent conditions.3. The desalination rates of three different kinds of material plates were tested while the influent rate was raged from 5ml/min to 15ml/min. Control other conditions being equal, the increased influent rates led to the reduction of desalination efficiency. However, the relatively low influent rate influenced the water production rate. The optimum influent rates of each material plate were obtained under the comprehensive analysis.4. Investigate the removal efficiency of NaCl, MgCl₂ and KCl simulated saline of three kinds of different materials electrode plates under the same conditions and analyzed the adsorption mechanism.5. Investigate the adsorption capacity of ammonia and organic matters of three kinds of different materials electrode plates under the same conditions.The main innovations of this thesis were as follows:1. It is the first time to explore the control conditions of different metals combined with active carbon fiber electrode plates during the treatment process and the electric adsorption capacity under different conditions.2. It is the first time to test the adsorption capacity of different salty ions, ammonia and organic matters of each kind of electrode plates.