University of Sousse, Laboratory of Energy and des Materials (LabEM): LR11ES34, Higher School of Science and Technology of Hammam Sousse, Tunisia; Faculty of Sciences of Monastir (Monastir University), Tunisia.
Faculty of Sciences of Monastir (Monastir University), Tunisia.
Chemosphere. 2020 Jun;249:126480. doi: 10.1016/j.chemosphere.2020.126480. Epub 2020 Mar 18.
Anodic oxidation process is considered as an effective solution for the treatment of refractory effluents. Its performance is strongly depending on the stability of the anodes used during the process. For this reason, we aim to enhance the stability of the SS/PbO anodes electrodeposited by pulsed current while studying their performance for the anodic oxidation of methylene blue and industrial textile wastewater. The basic idea deals with the possibility to replace the expensive alternatives used for reinforcing the steadiness of the anodes during the anodic oxidation by a simple method based on coupling electrochemical oxidation with biosorption by vegetable material (Luffa cylindrica). The performance of the coupling process was optimized based on its performance in colored and industrial wastewater depollution. Results confirmed the efficiency of the coupling process where 98.7 and 80.02% of methylene blue were removed, respectively, after 60 and 120 min for alternating and direct current. Otherwise, 62.84 and 46.87% of methylene blue were removed by anodic oxidation, respectively, after 120 and 180 min for alternating and direct current. The % COD obtained for the anodic oxidation and the coupling process reached 57.45, 33.61, 91.32 and 75.48% respectively for alternating and direct current. The use of alternating current for both processes has enhanced the speed and the efficiency. Atomic absorption analysis has confirmed that the rates obtained of Pb complied with those allowed by the Standards. LC/MS analysis allowed the identification of by-products generated and the germination tests proved the reuse of the treated water.
阳极氧化法被认为是处理难处理废水的有效方法。其性能强烈依赖于处理过程中使用的阳极的稳定性。出于这个原因，我们旨在通过脉冲电流增强 SS/PbO 阳极的稳定性，同时研究其对亚甲基蓝和工业纺织废水的阳极氧化性能。基本思路是研究是否有可能用一种简单的方法来取代在阳极氧化过程中用于增强阳极稳定性的昂贵替代品，这种方法基于将电化学氧化与植物材料（丝瓜络）的生物吸附相结合。根据有色和工业废水的净化效果，对耦合过程的性能进行了优化。结果证实了耦合过程的效率，在 60 和 120 分钟后，交替和直流电流下亚甲基蓝的去除率分别为 98.7%和 80.02%。此外，在 120 和 180 分钟后，交替和直流电流下阳极氧化对亚甲基蓝的去除率分别为 62.84%和 46.87%。对于阳极氧化和耦合过程，获得的 COD 去除率分别为 57.45%、33.61%、91.32%和 75.48%，对于交替和直流电流。这两个过程都使用交流电可以提高速度和效率。原子吸收分析证实，所获得的 Pb 速率符合标准允许的速率。LC/MS 分析允许鉴定生成的副产物，发芽试验证明了处理后水的再利用。
