SODIUM HYPOCHLORITE PRODUCTION FROM SALTED GROUNDWATER | Journal of Applied Chemical Science ......

The synthesis of low-concentration sodium hypochlorite for drinking water disinfection by direct electrolysis of naturally salted groundwater is discussed in this work. The use of mineralized groundwater as an electrolyte eliminates the need for a stage of artificial chloride solution synthesis. This simplifies disinfection production process and lowers operating expenses. The best electrochemical parameters for electrolysis unit operation and electrode service life were discovered. The initial concentration of chlorides, the anode current density, the electrode material, and the duration of electrolysis were all established as technological characteristics of the electrolysis unit operating on salted groundwater. The decomposition mechanism of sodium hypochlorite was investigated as a function of pH, temperature, and shelf life. The concentration of the resultant hypochlorite reduces dramatically with time for larger beginning concentrations. It was found that electrolysis of weakly concentrated sodium chloride solutions of 1.5-15 g/l is energy efficient, and that changing the polarity of the electrodes ensures the removal of cathode deposits and improves the efficiency of the sodium hypochlorite extraction process from natural mineralized waters.

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