Department of Environmental Engineering and Management, L.N. Gumilyov Eurasian National University, Satpayev Street 2, Nur-Sultan 010000, Kazakhstan.
Department of the UNESCO Chair for Sustainable Development, Al-Farabi Kazakh National University, Al-Farabi 71, Almaty 050040, Kazakhstan.
Molecules. 2022 Feb 2;27(3):1014. doi: 10.3390/molecules27031014.
Electrochemical methods have been increasingly gaining popularity in the field of wastewater treatment. However, the performance of these methods can be highly affected by the polarity direction as determined by the electrodes arrangement (anode to cathode or cathode to anode); as well as the characteristics of the wastewater to be treated as determined by the type of wastewater. The presented research work investigated the relationship between polarity direction and the removal of pollutants from poultry slaughterhouse wastewater using titanium and aluminium electrode materials. In the first case, the wastewater was exposed to the Ti (anode)-Al (cathode) combination, whereas in the second case the wastewater was subjected to the Al (anode)-Ti (cathode) arrangement. The two cases were designed to see if the polarity direction of the chosen electrode materials affected the removal of pollutants. The removal efficiencies were computed as a ratio of the remaining concentration in the treated effluent to the concentration before treatment. It was observed that the production processes generate highly fluctuating wastewater in terms of pollution loading; for instance, 422 to 5340 Pt-Co (minimum to maximum) were recorded from color, 126 to 2264 mg/L were recorded from total dissolved solids, and 358 to 5998 mg/L from chemical oxygen demand. Also, the research results after 40 min of retention time showed that both electrode arrangements achieved relatively high removal efficiencies; Whereby, the aluminium to titanium polarity achieved up to 100% removal efficiency from turbidity while the titanium to aluminium polarity achieved a maximum of 99.95% removal efficiency from turbidty. Also, a similar phenomenon was observed from total dissolved solids; whereby, on average 0 mg/L was achieved when the wastewater was purified using the aluminium to titanium arrangement, while on average 2 mg/L was achieved from the titanium to aluminium arrangement. A little higher removal efficiency discrepancy was observed from ammonia; whereby, the aluminium to titanium arrangement outperformed the titanium to aluminium arrangement with average removal efficiencies of 82.27% and 64.11%, respectively.
电化学方法在废水处理领域越来越受欢迎。然而，这些方法的性能可能会受到电极排列方向（阳极到阴极或阴极到阳极）以及待处理废水特性（废水类型）的极大影响。本研究工作调查了极性方向与使用钛和铝电极材料从家禽屠宰废水中去除污染物之间的关系。在第一种情况下，废水暴露于 Ti（阳极）-Al（阴极）组合，而在第二种情况下，废水受到 Al（阳极）-Ti（阴极）排列的影响。这两种情况旨在观察所选电极材料的极性方向是否会影响污染物的去除。去除效率是通过处理后废水中的剩余浓度与处理前浓度的比值计算得出的。结果表明，生产过程会产生高度波动的废水，就污染负荷而言；例如，颜色从 422 到 5340Pt-Co（最小到最大），总溶解固体从 126 到 2264mg/L，化学需氧量从 358 到 5998mg/L。此外，在 40 分钟保留时间后的研究结果表明，两种电极排列都实现了相对较高的去除效率；其中，铝对钛的极性实现了高达 100%的浊度去除效率，而钛对铝的极性实现了浊度去除效率的最大值 99.95%。同样，从总溶解固体中也观察到了类似的现象；其中，当废水使用铝对钛排列进行净化时，平均达到 0mg/L，而当废水使用钛对铝排列进行净化时，平均达到 2mg/L。从氨中观察到稍微更高的去除效率差异；其中，铝对钛的排列的去除效率分别为 82.27%和 64.11%，优于钛对铝的排列。
