WANGAn-jun,LINZhi-quan,SUNShao-fang,et al.Performance and Mechanism of Cu(Ⅱ)/Na2SO3 System for Sulfamethoxazole Degradation[J].China Water & Wastewater,2023,39(7):95-101.
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Performance and Mechanism of Cu(Ⅱ)/Na2SO3 System for Sulfamethoxazole Degradation

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第7期 Page: 95-101 Column: Date of publication: 2023-04-01
Author(s):
WANG　An-jun1;  LIN　Zhi-quan1;  SUN　Shao-fang1;  LI　Peng-yuan1;  GAO　Ming-chang2;  QIU　Li-ping3; 4
（1. School of Civil Engineering and Architecture， University of Jinan， Jinan 250022， China； 2. School of Conservancy and Environment， University of Jinan， Jinan 250022， China； 3. Shandong Province Engineering Technology Research Center for Water Purification Functional Material， Jinan 250022， China； 4. School of Municipal and Environmental Engineering， Shandong Jianzhu University， Jinan 250101， China）
Keywords:
Cu(Ⅱ);  Na2SO3;  sulfamethoxazole;  sulfate radical;  hydroxyl radical
Abstract:
Sulfamethoxazole (SMZ) was degraded by Cu(Ⅱ) catalyzed Na2SO3, and the degradation efficiency and mechanism were explored. The optimum reaction conditions of Cu(Ⅱ)/Na2SO3 system for SMZ degradation were as follows: pH of 7, initial SMZ concentration of 0.3 mg/L, Cu2+ concentration of 0.10 mmol/L, Na2SO3 concentration of 0.50 mmol/L and temperature of 25 ℃, and the degradation rate of SMZ reached 61.3% after 60 min reaction under these conditions. The results of electron paramagnetic resonance (EPR) and alcohol inhibitor experiments showed that ·OH and SO4·- were the main active substances in Cu(Ⅱ)/Na2SO3 system for SMZ degradation, and their contribution rates were 31.6% and 64.8%, respectively. Although the background ions such as chloride ion (Cl-) and bicarbonate ion (HCO3-) inhibited the degradation of SMZ to some extent, the Cu(Ⅱ)/Na2SO3 system still had a good performance for SMZ degradation in actual water bodies.
Last Update: 2023-04-01