Abstract

The present work evaluated the degradation efficiency by photocatalysis and the removal by adsorption with a sequential combination of these processes for the treatment of a bicomponent mixture of methylene blue and remazol yellow gold RNL 150 dyes. A recirculation system made from post-consumer plastic box residues was applied, in addition with supports for the TiO P25, made with post-consumption aluminum seals. The UV_c/H₂O₂/TiO_2supp system showed a 93.15% degradation after 360 min in the preliminary study. After applying a factorial design 2³, a 100% color removal was reached in 210 min, for the adsorptive process in lemon peel activated with H₃PO₄ and HCl (1.6 g L⁻¹). The combined system, consisting of photocatalysis followed by adsorption as a polishing treatment, proved to be more efficient, promoting a degradation of 100% of the chromophor groups and 90.4% for the aromatic groups, in 105 min, a shorter time than either individual process. In addition, a textile effluent subjected to the combined system promoted degradation/removal of 60% (254 nm) and 82% (663 nm) for the evaluated wavelengths.

摘要

目前的工作评估了光催化降解效率和吸附去除效率，这些过程的顺序组合用于处理亚甲蓝和雷马唑黄金 RNL 150 染料的双组分混合物。应用了由消费后塑料盒残留物制成的再循环系统，此外还有由消费后铝密封制成的 TiO P25 支撑。在初步研究中，UV _c /H ₂ O ₂ /TiO 2 _supp系统在 360 分钟后显示出 93.15% 的降解。应用因子设计 2 ^{3 后}，对于用 H ₃ PO ₄激活的柠檬皮中的吸附过程，在 210 分钟内达到 100% 的颜色去除和 HCl (1.6 g L ^-1 )。由光催化和作为抛光处理的吸附组成的组合系统被证明更有效，在 105 分钟内促进 100% 的发色团降解和 90.4% 的芳香基团降解，比任何一个单独的过程都更短的时间. 此外，经过组合系统处理的纺织废水促进了所评估波长的 60% (254 nm) 和 82% (663 nm) 的降解/去除。