Environmental Water Phase Relationship Of The Physical Chemistry Of Surfactants And Salts And Its Effect On The Electrochemical Process

In order to investigate the interaction between organic and inorganic components in environmental aqueous solutions, a solution is selected, which contains an anionic surfactant and NaCl. The anionic surfactant is sodium dodecyl sulfate (SDS). The effects of temperature and the concentrations of components on five parameters are studied. These parameters are viscosity, surface tension, conductivity, redox potential and refractive index. Electroflotation is also selected to test the changes of these parameters during this experiment and to find the more important factors in electrochemical progress.A strong effect of temperature on the physical chemical properties of SDS solution is found. In the solution, which its SDS concentrations is not higher than 1000ppm(0.017M), solution viscosity descends logarithmically with the increase of temperature during 298.15K and 348.15K. Temperature has prominent effects on solution conductivity. The conductivity almost linearly increases with temperature during 298.15K and 348.15K. The refractive index descends linearly with temperature during 298.15K and 323.15K. The redox potentials descends slowly with temperature. Only the surface tensions is less affected by temperature in the experiments.With fixed temperature and NaCl concentrations, the effects of SDS concentrations changing from 10 to 5000ppm on the parameters as above are experimented. The results indicate that the solution viscosity keep constant in spite of the changes of SDS concentrations. The conductivity linearly increases with SDS concentrations when no NaCl but shows a little changes when NaCl is added. The refractive index shows some increases when SDS concentration increases higher than 1000ppm. The redox potentials shows a little change during the changes of SDS concentrations. First, the surface tensions descends quickly when the SDS concentration is smaller, and then increases slowly.With fixed temperature and SDS concentrations, the effects of NaCl concentrations changing from 0 to 10000ppm on the parameters as above are also experimented. The effects of NaCl on the viscosity can be neglected under the conditions in the experiments. The effects of NaCl on the redox potentials like viscosities' is neglected. NaCl concentrations has prominent effects on solution conductivity. The conductivity rises with the increases of NaCl concentrations. The refractive index also rises with the increases of NaCl concentrations. The effects of NaCl on the surface tension show a little complex changes.The results of electroflotation indicate that solution conductivity has importantinfluence on the relation between charge and current in the experiment. Inorganic salts is one of the important causes which affect the electrolysis. The bubbles are also influenced by the salts.