Comparison of Persulfate/UV-C and Peroxymonosulfate/UV-C Processes for COD and TOC Removal in Urban Wastewater Treatment

IF 0.5 4区化学 Q4 CHEMISTRY, ANALYTICAL

Journal of Water Chemistry and Technology Pub Date : 2023-08-15 DOI:10.3103/S1063455X23040069

Gül Kaykioğlu, Mir Servan Uçkan

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Abstract

In this study, PS/UV-C and PMS/UV-C processes were used for the removal of pollutants from domestic and industrial wastewater. The effects of initial oxidant concentration, initial pH value and reaction time on COD and TOC removal efficiencies were determined by laboratory-scale, batch experimental studies. In the results of the study, the highest removal efficiency was obtained with PS/UV-C process at 25 mM oxidant concentration, pH 7 and at the end of the reaction time of 60 min, and the COD and TOC removal efficiencies were found to be 90.5 and 90.8%, respectively. In the study, unit and specific electricity consumptions were also calculated in order to compare the costs of PS/UV-C and PMS/UV-C processes. The optimum removal efficiency for PS/UV-C was obtained at pH 7 and 25 mM PS concentration and at 60 min of reaction time. Unit electricity consumption (E_EO) values for COD and TOC parameters were calculated as 39.1 and 38.4 kWh/m³, respectively, and specific electricity consumption (E_EM) as 80.5 and 181.8 kWh/kg, respectively. As a result of the kinetic studies obtained f or COD removal in both PS/UV-C and PMS/UV-C applications, it was determined that the reaction was compatible with the second-order kinetic model. PS/UV-C reaction rate was obtained 2 times higher than PMS/UV-C. It has been determined that PS/UV-C process is a more suitable process in terms of removing COD and TOC compared to PMS/UVC in the treatment of this urban wastewater.

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过硫酸盐/UV-C和过氧单硫酸盐/UV-C工艺去除城市污水中COD和TOC的比较

研究了PS/UV-C和PMS/UV-C两种工艺对生活和工业废水中污染物的去除效果。通过实验室批量实验研究，确定了初始氧化剂浓度、初始pH值和反应时间对COD和TOC去除率的影响。研究结果表明，在氧化剂浓度为25 mM、pH为7、反应结束时间为60 min时，PS/UV-C工艺的去除率最高，COD去除率为90.5%，TOC去除率为90.8%。为了比较PS/UV-C和PMS/UV-C工艺的成本，本研究还计算了单位和比耗电量。在pH为7、PS浓度为25 mM、反应时间为60 min时，对PS/UV-C的去除率最高。计算出COD和TOC参数的单位电耗(EEO)分别为39.1和38.4 kWh/m3，比电耗(EEM)分别为80.5和181.8 kWh/kg。通过对PS/UV-C和PMS/UV-C应用中COD去除的动力学研究，确定了该反应符合二级动力学模型。PS/UV-C反应速率比PMS/UV-C反应速率高2倍。实验结果表明，PS/UV-C工艺在去除COD和TOC方面优于PMS/UVC工艺。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Water Chemistry and Technology CHEMISTRY, APPLIED-CHEMISTRY, ANALYTICAL

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Water Chemistry and Technology focuses on water and wastewater treatment, water pollution monitoring, water purification, and similar topics. The journal publishes original scientific theoretical and experimental articles in the following sections: new developments in the science of water; theoretical principles of water treatment and technology; physical chemistry of water treatment processes; analytical water chemistry; analysis of natural and waste waters; water treatment technology and demineralization of water; biological methods of water treatment; and also solicited critical reviews summarizing the latest findings. The journal welcomes manuscripts from all countries in the English or Ukrainian language. All manuscripts are peer-reviewed.