Adar E
Department of Environmental Engineering, Faculty of Engineering, Artvin Coruh University, Seyitler Campus, 08100 Artvin, Turkey.
Int J Environ Sci Technol (Tehran). 2021;18(2):483-498. doi: 10.1007/s13762-020-02986-5. Epub 2020 Oct 26.
Azo dyes commonly used in various industries have a stable and toxic structure. Wastewater containing AY17 dye as a model contaminant was investigated in terms of color and COD removal by both adsorption and persulfate oxidation activated with the PAC. In this study, the effects of temperature (25-50 °C), pH (3-10), persulfate concentration (1000-4000 mg/L), adsorbent dosage (0.1-0.5 g), reaction time (5-60 min), dye concentration (300-1000 mg/L) and NaCI concentration (0-1000 mg/L) on both color and COD removals from wastewater containing AY17 dye were examined. As a result of the study, it was seen that the dosage of adsorbent, pH and reaction time are important parameters in both systems. The use of the PAC as an adsorbent caused to shortening of the reaction time in the HPS system. It also showed that acidic and neutral pH values are more suitable for the removal of AY17 with both systems. Color and COD removal were determined as 100-88.4% and 100-96.6%, respectively, at optimum values obtained for the adsorption and HPS system. An experimental design was applied for various operating parameters in order to analyze experimental data. Models have been proposed for both color removal and COD removal estimates for both systems.
各行业常用的偶氮染料具有稳定且有毒的结构。以含AY17染料的废水作为模型污染物，研究了通过吸附以及用PAC活化过硫酸盐氧化来去除颜色和化学需氧量（COD）的情况。在本研究中，考察了温度（25 - 50°C）、pH值（3 - 10）、过硫酸盐浓度（1000 - 4000 mg/L）、吸附剂用量（0.1 - 0.5 g）、反应时间（5 - 60分钟）、染料浓度（300 - 1000 mg/L）和氯化钠浓度（0 - 1000 mg/L）对含AY17染料废水的颜色和COD去除的影响。研究结果表明，吸附剂用量、pH值和反应时间在两个系统中都是重要参数。使用PAC作为吸附剂使得过硫酸盐高级氧化（HPS）系统中的反应时间缩短。研究还表明，酸性和中性pH值更适合两个系统去除AY17。在吸附和HPS系统的最佳值下，颜色去除率和COD去除率分别确定为100% - 88.4%和100% - 96.6%。为了分析实验数据，对各种操作参数应用了实验设计。针对两个系统的颜色去除和COD去除估计都提出了模型。
