Laboratory for Research on Advanced Processes for Water Treatment, Instituto de Ingeniería, Unidad Académica Juriquilla, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Campus UNAM Juriquilla, Querétaro 76230, Mexico.
J Environ Manage. 2013 Dec 15;131:66-73. doi: 10.1016/j.jenvman.2013.09.018. Epub 2013 Oct 18.
The aim of this study was to propose and to evaluate a strategy based on chemometric tools to improve the robustness of photo-Fenton processes during decolorization of mixtures of sulfonated azo dyes. The strategy consisted of three stages: quantification, reagent dose selection and robustness analysis. The partial least square method was used for the simultaneous quantification of acid orange 7, acid red 151, and acid blue 113, in a mixture, by using UV-visible spectra. Then, a central composite design was applied to set the best reagent dose (Fe(2+) and H2O2) to obtain a decolorization of 97% for each dye. The application of the strategy allowed to predict the concentration of each dye and to select the best reagent dose to decolorize mixtures of sulfonated dyes. Also with the application of the developed strategy, a reduction of peroxide from 33 to 65% was obtained and the undesirable reactions were reduced. It was observed that the variation of dye concentrations do not affected the percentage of decolorization.
本研究旨在提出并评估一种基于化学计量学工具的策略，以提高光芬顿工艺在混合磺化偶氮染料脱色过程中的稳健性。该策略包括三个阶段：定量、试剂剂量选择和稳健性分析。偏最小二乘法用于通过紫外-可见光谱同时定量混合物中的酸性橙 7、酸性红 151 和酸性蓝 113。然后，应用中心复合设计来确定最佳试剂剂量（Fe(2+)和 H2O2），以实现每种染料的脱色率达到 97%。该策略的应用允许预测每种染料的浓度并选择最佳试剂剂量来脱色磺化染料混合物。此外，通过应用所开发的策略，还可以将过氧化物的用量从 33%减少到 65%，并减少了不必要的反应。结果表明，染料浓度的变化不会影响脱色率。
