Utilization of UV LED light is trending in the development of photoreactors for pollutant treatment. In this study, two different geometries were studied in the degradation of methylenebBlue (MB) using high power UVA LED as a source of light. The dosage, initial concentration, electric power, and H2O2 addition were evaluated in the two geometries: a mini CPC (Cilindrical Parabolic Collector) and a vertical cylindrical with external irradiation both coupled with LED UVA. Best degradation was obtained for 0.3 g L-1 TiO2, 40 min, and 15 ppm of MB of initial concentration in the standard batch reactor. It was found that the best system was a cpc geometry. Also, hydrogen peroxide was used as an electron acceptor and 97 degradation was obtained in 30 min with 10 mM H2O2 and 0.4 g TiO2/L. Power of the LEDs was also evaluated and it was found that 20 W m(-2) is the best operational condition to achieve the best MB degradation avoiding the oxidant species recombination.
展开▼
机译：UV LED灯的利用是用于污染物处理的光反应器发展的趋势。在这项研究中，研究了使用高功率UVA LED作为光源降解亚甲基蓝色（MB）的两种不同几何形状。在两种几何形状中评估了剂量、初始浓度、电功率和 H2O2 添加量：迷你 CPC（西林抛物面收集器）和垂直圆柱形，外部照射均与 LED UVA 耦合。在标准间歇式反应器中，0.3 g L-1 TiO2、40 min和15 ppm MB的初始浓度得到最佳降解效果。结果发现，最好的系统是 cpc 几何。此外，使用过氧化氢作为电子受体，用10 mM H 2 O 2 O 2 和 0.4 g TiO2/L 在 30 分钟内获得 97% 的降解率，还评估了 LED 的功率，发现 20 W m（-2） 是实现最佳 MB 降解的最佳操作条件，避免了氧化剂物种的复合。
展开▼
