Barlak Melahat Semin, Cengiz Ibrahim, Degermenci Nejdet, Yildiz Ergun
Department of Civil and Environmental Engineering Colorado State University Fort Collins CO 80523 USA.
Faculty of Applied Science Department of Emergency Aid and Disaster Management Atatürk University Erzurum 25400 Türkiye.
Glob Chall. 2025 Jul 2;9(8):e00085. doi: 10.1002/gch2.202500085. eCollection 2025 Aug.
In this study, phenol removal by ozonation under strong alkaline conditions in a continuously operated jet loop reactor (JLR) is investigated. The effects of inlet ozone gas concentration, hydraulic retention time (HRT), and influent phenol concentration on phenol, chemical oxygen demand (COD), and total organic carbon (TOC) removal in the JLR effluent are evaluated. When the inlet ozone gas concentration is 17.5 gO m, the steady-state phenol, COD, and TOC removal efficiencies are determined as 97.8%, 61.1%, and 32.2%, respectively. When the inlet ozone concentration increases from 17.5 to 56.5 gO m, phenol is not detected in the JLR effluent. The system operates at different HRTs, and the highest removal efficiency at steady-state is obtained at 8 h HRT. While phenol is completely removed at this HRT, COD and TOC removals are 76.8% and 48.2%, respectively. An increase in phenol concentration in the JLR influent leads to a reduction in the phenol, COD, and TOC removal efficiencies in the steady-state effluent.
在本研究中，对连续运行的喷射环流反应器（JLR）中强碱性条件下臭氧氧化去除苯酚的过程进行了研究。评估了入口臭氧气体浓度、水力停留时间（HRT）和进水苯酚浓度对JLR流出物中苯酚、化学需氧量（COD）和总有机碳（TOC）去除率的影响。当入口臭氧气体浓度为17.5 gO₃/m³时，稳态下苯酚、COD和TOC的去除效率分别确定为97.8%、61.1%和32.2%。当入口臭氧浓度从17.5 gO₃/m³增加到56.5 gO₃/m³时，JLR流出物中未检测到苯酚。该系统在不同的HRT下运行，在HRT为8 h时获得稳态下的最高去除效率。在此HRT下苯酚被完全去除，而COD和TOC的去除率分别为76.8%和48.2%。JLR进水苯酚浓度的增加导致稳态流出物中苯酚、COD和TOC去除效率的降低。
