The UV/Ag-TiO2/O3 process was investigated for ballast water treatment using Dunaliella salina as an indicator. Inactivation curves were obtained, and the toxicity of effluent was determined. Compared with individual ...The UV/Ag-TiO2/O3 process was investigated for ballast water treatment using Dunaliella salina as an indicator. Inactivation curves were obtained, and the toxicity of effluent was determined. Compared with individual unit processes using ozone or UV/Ag-TiO2, the inactivation efficiency ofD. salina by the combined UV/Ag-TiO2/O3 process was enhanced. The presence of ozone caused an immediate decrease in chlorophyll a （chl-a） concentration. Inactivation efficiency and chl-a removal efficiency were positively correlated with ozone dose and ultraviolet intensity. The initial total residual oxidant （TRO） concentration of effluent increased with increasing ozone dose, and persistence of TRO resulted in an extended period of toxicity. The results suggest that UV/Ag-TiO2/O3 has potential for ballast water treatment.展开更多
为降低紫外线对聚丙烯(Polyethylene,PP)非织造土工布的影响,选择ES(Ethylene-Propylene Side By Side)纤维和含有抗老化母粒的PP纤维为原料,TiO_(2)浸轧处理为后整理工序,采用针刺加固和热黏合加固技术制备了具有抗紫外老化功能的PP/E...为降低紫外线对聚丙烯(Polyethylene,PP)非织造土工布的影响,选择ES(Ethylene-Propylene Side By Side)纤维和含有抗老化母粒的PP纤维为原料,TiO_(2)浸轧处理为后整理工序,采用针刺加固和热黏合加固技术制备了具有抗紫外老化功能的PP/ES高强非织造土工布。研究了抗老化工艺对PP/ES土工布力学性能和抗紫外老化性能的影响。结果表明:添加抗老化母粒和TiO_(2)浸轧后整理的PP/ES土工布力学性能少许上升;该土工布紫外老化后的羰基吸收峰强度最弱,T 5%仅下降4.73℃,纵向和横向的断裂强度保留率仅下降26.55%和26.76%,表现出最佳的抗紫外老化性能。展开更多
基金supported by the Heilongjiang Provincial Science and Technology Development Program (No.GC06C20503)
文摘The UV/Ag-TiO2/O3 process was investigated for ballast water treatment using Dunaliella salina as an indicator. Inactivation curves were obtained, and the toxicity of effluent was determined. Compared with individual unit processes using ozone or UV/Ag-TiO2, the inactivation efficiency ofD. salina by the combined UV/Ag-TiO2/O3 process was enhanced. The presence of ozone caused an immediate decrease in chlorophyll a （chl-a） concentration. Inactivation efficiency and chl-a removal efficiency were positively correlated with ozone dose and ultraviolet intensity. The initial total residual oxidant （TRO） concentration of effluent increased with increasing ozone dose, and persistence of TRO resulted in an extended period of toxicity. The results suggest that UV/Ag-TiO2/O3 has potential for ballast water treatment.
文摘为降低紫外线对聚丙烯(Polyethylene,PP)非织造土工布的影响,选择ES(Ethylene-Propylene Side By Side)纤维和含有抗老化母粒的PP纤维为原料,TiO_(2)浸轧处理为后整理工序,采用针刺加固和热黏合加固技术制备了具有抗紫外老化功能的PP/ES高强非织造土工布。研究了抗老化工艺对PP/ES土工布力学性能和抗紫外老化性能的影响。结果表明:添加抗老化母粒和TiO_(2)浸轧后整理的PP/ES土工布力学性能少许上升;该土工布紫外老化后的羰基吸收峰强度最弱,T 5%仅下降4.73℃,纵向和横向的断裂强度保留率仅下降26.55%和26.76%,表现出最佳的抗紫外老化性能。
