Starling Maria Clara V M, Castro Luiz Augusto S, Marcelino Rafaela B P, Leão Mônica M D, Amorim Camila C
Department of Sanitary and Environmental Engineering, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Minas Gerais, 31270-901, Brazil.
Environ Sci Pollut Res Int. 2017 Mar;24(7):6222-6232. doi: 10.1007/s11356-016-6157-8. Epub 2016 Feb 11.
In this study, photo-Fenton systems using visible light sources with iron and ferrioxalate were tested for the DOC degradation and decolorization of textile wastewater. Textile wastewaters originated after the dyeing stage of dark-colored tissue in the textile industry, and the optimization of treatment processes was studied to produce water suitable for reuse. Dissolved organic carbon, absorbance, turbidity, anionic concentrations, carboxylic acids, and preliminary cost analysis were performed for the proposed treatments. Conventional photo-Fenton process achieved near 99 % DOC degradation rates and complete absorbance removal, and no carboxylic acids were found as products of degradation. Ferrioxalate photo-Fenton system achieved 82 % of DOC degradation and showed complete absorbance removal, and oxalic acid has been detected through HPLC analysis in the treated sample. In contrast, photo-peroxidation with UV light was proved effective only for absorbance removal, with DOC degradation efficiency near 50 %. Treated wastewater was compared with reclaimed water and had a similar quality, indicating that these processes can be effectively applied for textile wastewater reuse. The results of the preliminary cost analysis indicated costs of 0.91 to 1.07 US$ m for the conventional and ferrioxalate photo-Fenton systems, respectively. Graphical Abstract ᅟ.
在本研究中，测试了使用含铁和草酸铁的可见光源的光芬顿体系对纺织废水的溶解性有机碳（DOC）降解和脱色效果。纺织废水源自纺织工业中深色织物染色阶段之后，并且研究了处理工艺的优化以生产适合回用的水。对所提出的处理方法进行了溶解有机碳、吸光度、浊度、阴离子浓度、羧酸以及初步成本分析。传统光芬顿工艺实现了近99%的DOC降解率和完全的吸光度去除，并且未发现羧酸作为降解产物。草酸铁光芬顿体系实现了82%的DOC降解，并显示出完全的吸光度去除，通过高效液相色谱（HPLC）分析在处理后的样品中检测到了草酸。相比之下，紫外光光过氧化仅对吸光度去除有效，DOC降解效率接近50%。将处理后的废水与再生水进行比较，其水质相似，表明这些工艺可有效地应用于纺织废水回用。初步成本分析结果表明，传统光芬顿体系和草酸铁光芬顿体系的成本分别为每立方米0.91至1.07美元。图形摘要ᅟ。
