The Preparation And Property Study Of Slow-release Hydrosol Of Ozone

With the improvement of humans’ living standard,gradually people were having increasingly high requirements on food safety,certain issues including pesticide residues began to get people’s attention.It has been a hot spot to get rid of the harm of pesticide residues while solving the problem of plant diseases and insect pests.Ozone disinfection has become one of the major scientific methods to reform and innovate the traditional agriculture,but there were still some practical problems due to the instability of ozone in its aqueous solution at room temperature.This study planed to improve the instability of ozone,so it could be applied to prevent and control the plant diseases and insect pests as an agricultural green pesticide.This study aimed to improve the instability of ozone in the aqueous solution,therefore,the innovation and the key point of this work was to find an appropriate hydrosol to dissolve the ozone.The impacts of several factors,including gel type,pH,temperature,water quality and the way of preparation,on the instability of ozone were investigated,and finally the polyacrylamide hydrosol was indentified.In this paper,the ozone hydrosol was obtained finally:the running water as the source of water,the polyacrylamide hydrosol 1.0 g/L,with 10 mg/L citric acid as the stabilizer.The half-life period could be extended to 30 hours,which was far more than the half-life period of ten min in the common water.The sterilization effect of the ozone hydrosol was also tested in this study.The evaluation of bactericidal potency of ozone hydrosol against the typical bacteria,such as Escherichia coli,Staphylococcus aureus and Candida albicans,was studied.The sterilization effect of the ozone hydrosol could extend the half-life period effectively and increase the time of sterilization compared to the traditional sterilization effect of ozone.Also,the sterilization effect of the ozone hydrosol against the soil bacteria under several conditions was explored.The optimal ratio of the ozone hydrosol was identified,the sterilizing rate was 93%on the common bacteria,and the sterilizing rate could still reach 85%with the ideal situatian of temperature,pH and function time.