Optimized treatment conditions for textile wastewater reuse using photocatalytic processes under UV and visible light sources
Optimized treatment conditions for textile wastewater reuse using photocatalytic processes under UV and visible light sources
复制标题
使用紫外和可见光源下的光催化工艺优化纺织废水回用处理条件
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
C. Amorim
中科院分区：
文献类型：
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作者：
M. C. Starling;L. A. Castro;R. B. Marcelino;M. M. Leão;C. Amorim
摘要本研究以可见光为光源，以铁和草酸铁为氧化剂，研究了光-Fenton体系对纺织废水中DOC的降解和脱色。纺织工业中深色薄纸染色后产生的纺织废水，通过优化处理工艺，得到了适合于回用的废水。溶解有机碳，吸光度，浊度，阴离子浓度，羧酸，和初步的成本分析进行了拟议的处理。传统的光Fenton法对DOC的降解率接近99%，吸收完全去除，降解产物中没有羧酸类物质。草酸铁光-Fenton体系对DOC的降解率达到82%，并表现出完全的吸光度去除，通过HPLC分析，在处理后的样品中检测到草酸。相反，光氧化与紫外线被证明是有效的吸收去除，DOC降解效率接近50%。处理后的废水与再生水相比，具有相似的质量，表明这些工艺可以有效地应用于纺织废水回用。初步成本分析的结果表明，常规和草酸铁光芬顿系统的成本分别为0.91至1.07美元/m3。
图形摘要
AbstractIn 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−3 for the conventional and ferrioxalate photo-Fenton systems, respectively.
Graphical Abstractᅟ