水力空化联合H2O2降解壳聚糖的研究

本文利用水力空化装置降解壳聚糖,研究了壳聚糖浓度、入口压力、pH值、温度、H2O2浓度等不同因素下对壳聚糖溶液降解的影响.实验结果表明,水力空化对壳聚糖的降解程度随壳聚糖浓度的增加而减小;随着入口压力及水温的增加而增大;在一定条件下,水力空化对壳聚糖的降解存在着一个最佳的pH值;水力空化联合H2O2强化处理大大增强了降解的效果,其联合既能减少氧化剂的投放,也能提高降解的效率.

Degradation of Chitosan by Hydrodynamic Cavitation and H2O2

The degradation of chitosan was systematically investigated with hydrodynamic cavitation enhanced by oxidation of H2 O2. The effects of the concentration of chitosan, the inlet pressure, pH value, the temper- ature and the concentration of H2 O2 on the degradation of chitosan were evaluated by using hydrodynamic cav- itation. The results show that the degradation of chitosan by using hydrodynamic cavitation decreases with in- creasing the chitosan solution; and the rate of chitosan degradation increases with the inlet pressure increas- ing. So does the factor of the temperature. The degradation effect of chitosan can be improved when the pH is at a optimum condition. Combining hydrodynamic cavitation and H2O2 to degrade chitosan largely strengthens the degradation; It not only reduce the dosage of oxidation but also improve the efficiency of the degradation.