Study on thermostability of chlorine dioxide molecules in water solution

In order to observe the stability of new-type stable chlorine dioxide disinfection solution,water bath warming method was used to study experimentally the influence on thermostability of neutral water solution of chlorine dioxide and the stabilizer.Results: The thermodecomposition of chlorine dioxide in water solution belonged to second-order reaction and the thermodecomposition rate constant(K) increased with increasing temperature.The stabilizer of monohydric phosphate radical group caused significant increase in K value,i.e.,monohydric phosphate radical had strong catalytic effect on thermodecomposition of chlorine dioxide.The thermodecomposition rate constant of chlorine dioxide in the solution containing monohydric phosphate radical ion decreased with increasing temperature,indicating that monohydric phosphate radical ion had certain stabilizing effect on chlorine dioxide.Addition of organic polyamine or polyamine sugar to the water solution of chlorine dioxide produced obvious stabilizing effect on it.Conclusion: Increase in temperature can accelerate the decomposition of chlorine dioxide in water solution.Addition of suitable stabilizer can increase obviously the thermostability of chlorine dioxide in water solution.