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以β-环柠檬醛为典型目标污染物,采用UV-C辐照工艺进行了降解研究,目标物质在254nm处具有最高的吸收峰,光降解特性良好.灯管功率6W,β-环柠檬醛初始质量浓度为1 552ng/L,反应60min时,去除率可达96.3%,β-环柠檬醛光降解反应过程符合一级反应动力学.增大光强和提高初始质量浓度均可提高反应速率;弱碱性最有利于UV-C辐照降解β-环柠檬醛;水中存在的阳离子对光降解速率影响不大;阴离子具有较强的促进作用,强弱顺序为NO-3>CO32->HCO-3>SO2-4;投加H2O2可提高光降解速率;水质条件对β-环柠檬醛光解存在影响,水质条件最为复杂的原水中β-环柠檬醛降解速率最低.
The degradation of β -cyclo-citral was studied by UV-C irradiation with the highest absorption peak at 254nm and the photodegradation was good.When the lamp power was 6W, β-Cyclodecane The initial mass concentration of 1 552 ng / L, the reaction time of 60 min, the removal rate of up to 96.3%, β-Cyclocitrate photodegradation reaction process in line with the first-order reaction kinetics. Increasing the light intensity and increase the initial concentration can improve the reaction rate ; Weakly alkaline is most conducive to UV-C radiation degradation of β -cyclic citral; cations present in water have little effect on photodegradation rate; anion has a strong role in promoting the strength of the order of NO-3> CO32-> HCO-3> SO2-4. The addition of H2O2 increased photodegradation rate. The influence of water quality on the photolysis of β-Cyclocit aldehyde was the worst. The degradation rate of β-Cyclocitral was the lowest in the water with the most complicated water quality.