Vidal Jorge, Villegas Loreto, Peralta-Hernández Juan M, Salazar González Ricardo
a Department of Materials Chemistry, Laboratory of Environmental Electrochemistry, LEQMA, Faculty of Chemistry and Biology , Santiago , Chile.
b Department of Environmental Sciences , Faculty of Chemistry and Biology, Santiago, University of Santiago of Chile, USACH , Correo , Santiago , Chile.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2016;51(4):289-96. doi: 10.1080/10934529.2015.1109385. Epub 2016 Jan 8.
Application of an electrocoagulation process (EC) for the elimination of AB194 textile dye from synthetic and textile wastewater (effluent) contaminated with AB194 dye, was carried out using aluminum anodes at two different initial pH values. Tafel studies in the presence and absence of the dye were performed. The aluminum species formed during the electrolysis were quantified by atomic absorption, and the flocs formed in the process were analyzed by HPLC-MS. Complete removal of AB194 from 1.0 L of solution was achieved applying low densities current at initial pH values of 4.0 and 8.0. The removal of AB194 by EC was possible with a short electrolysis time, removing practically 100% of the total organic carbon content and chemical oxygen demand. The final result was completely discolored water lacking dye and organic matter. An effluent contaminated with 126 mg L(-1) AB194 dye from a Chilean textile industry was also treated by EC under optimized experimental conditions, yielding discolored water and considerably decreasing the presence of organic compounds (dye + dyeing additives), with very low concentrations of dissolved Al(3+). Analysis of flocs showed the presence of the original dye without changes in its chemical structure.
采用铝阳极，在两个不同的初始pH值下，应用电凝聚法（EC）去除受AB194染料污染的合成废水和纺织废水中的AB194纺织染料。在有染料和无染料存在的情况下进行了塔菲尔研究。通过原子吸收法定量分析电解过程中形成的铝物种，并用高效液相色谱-质谱联用仪（HPLC-MS）分析该过程中形成的絮凝物。在初始pH值为4.0和8.0时，通过施加低密度电流实现了从1.0 L溶液中完全去除AB194。通过电凝聚法去除AB194只需较短的电解时间，实际上能去除100%的总有机碳含量和化学需氧量。最终得到的是完全脱色且不含染料和有机物的水。在优化的实验条件下，采用电凝聚法对来自智利某纺织工业的含有126 mg L(-1) AB194染料的废水进行处理，得到了脱色的水，并显著降低了有机化合物（染料+染色添加剂）的含量，溶解的Al(3+)浓度极低。对絮凝物的分析表明存在原始染料，但其化学结构未发生变化。
