Nawaz Muhammad Imran, Yi Chengwu, Zafar Abdul Mannan, Yi Rongjie, Abbas Babar, Sulemana Husseini, Wu Chundu
School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
Civil and Environmental Engineering Department, United Arab Emirates University, AlAin, 15551, United Arab Emirates; Biotechnology Research Center, Technology Innovation Institute, Masdar, 9639, Abu Dhabi, United Arab Emirates.
Environ Res. 2023 Nov 15;237(Pt 2):117015. doi: 10.1016/j.envres.2023.117015. Epub 2023 Aug 29.
Aniline is a priority pollutant that is unfavorable to the environment and human health due to its carcinogenic and mutagenic nature. The performance of the dielectric barrier discharge reactor was examined based on the aniline degradation efficiency. Different parameters were studied and optimized to treat various wastewater conditions. Role of active species for aniline degradation was investigated by the addition of inhibitors and promoters. The optimum conditions were 20 mg/L initial concentration, 1.8 kV applied voltage, 4 L/min gas flow rate and a pH of 8.82. It was observed that 87% of aniline was degraded in 60 min of dielectric barrier discharge treatment at optimum conditions. UV-Vis spectra showed gradual increase in the treatment efficiency of aniline with the propagation of treatment time. Mineralization of AN was confirmed by TOC measurement and a decrease in pH during the process. To elicit the aniline degradation route, HPLC and LC-MS techniques were used to detect the intermediates and byproducts. It was identified that aniline degraded into different organic byproducts and was dissociated into carbon dioxide and water. Comparison of the current system with existing advanced oxidation processes showed that DBD has a remarkable potential for the elimination of organic pollutants.
苯胺是一种优先污染物，因其具有致癌和致突变性，对环境和人类健康不利。基于苯胺降解效率对介质阻挡放电反应器的性能进行了考察。研究并优化了不同参数以处理各种废水条件。通过添加抑制剂和促进剂研究了活性物种在苯胺降解中的作用。最佳条件为初始浓度20mg/L、施加电压1.8kV、气体流速4L/min和pH值8.82。观察到在最佳条件下进行60分钟的介质阻挡放电处理后，87%的苯胺被降解。紫外可见光谱表明，随着处理时间的延长，苯胺的处理效率逐渐提高。通过总有机碳测量和过程中pH值的降低证实了苯胺的矿化。为了确定苯胺的降解途径，采用高效液相色谱和液相色谱-质谱技术检测中间体和副产物。结果表明，苯胺降解为不同的有机副产物，并分解为二氧化碳和水。将当前系统与现有的高级氧化工艺进行比较表明，介质阻挡放电在消除有机污染物方面具有显著潜力。
