de Oliveira Isadora Schwingel, Viana Lilian, Verona Cenira, Fallavena Vera Lúcia Vargas, Azevedo Carla Maria Nunes, Pires Marçal
Faculty of Chemistry, Pontifical Catholic University of Rio Grande do Sul, Av. Ipiranga 6681, 90619-900, Porto Alegre, RS, Brazil.
J Hazard Mater. 2007 Jul 31;146(3):564-8. doi: 10.1016/j.jhazmat.2007.04.057. Epub 2007 Apr 20.
Advanced oxidation processes are an emerging option to treatment of the painting industry effluents. The aim of this study was to compare the effectiveness of the Fenton and photo-Fenton processes in chemical oxygen demand (COD), total organic carbon (TOC) and phenolic compounds removal from wastewaters generated during alkydic resins manufacture. The optimized treatment conditions are the following: pH 3.0, 15.15x10(-3)molL(-1) FeSO(4) and 0.30molL(-1) H(2)O(2) for a reaction time of 6h. photo-Fenton experiments were carried out in the presence of sunlight or artificial radiation and complementary additions of H(2)O(2) were made for all experiments. The best results were obtained with photo-Fenton process assisted with solar radiation, with reductions of 99.5 and 99.1% of COD and TOC levels, respectively. Fenton and photo-Fenton (with artificial irradiation) processes presented lower but not insignificant removals, within 60-80% reduction for both COD and TOC. In addition, an excellent removal (95%) of total phenols was obtained using photo-Fenton process assisted with artificial irradiation. This study demonstrated that the use of photo-Fenton process on alkydic resins wastewater treatment is very promising especially when solar light is used.
高级氧化工艺是处理涂料工业废水的一种新兴方法。本研究的目的是比较芬顿法和光芬顿法在去除醇酸树脂制造过程中产生的废水中化学需氧量（COD）、总有机碳（TOC）和酚类化合物方面的效果。优化后的处理条件如下：pH值为3.0，FeSO₄浓度为15.15×10⁻³mol/L，H₂O₂浓度为0.30mol/L，反应时间为6小时。光芬顿实验在阳光或人工辐射条件下进行，所有实验均补充添加H₂O₂。在太阳辐射辅助的光芬顿工艺中获得了最佳结果，COD和TOC水平分别降低了99.5%和99.1%。芬顿法和（人工辐照的）光芬顿法去除率较低但并非微不足道，COD和TOC的去除率均在60 - 80%之间。此外，在人工辐照辅助的光芬顿工艺中，总酚的去除率高达95%。本研究表明，光芬顿工艺用于醇酸树脂废水处理非常有前景，尤其是在使用太阳光的情况下。
