Removal of antibiotics and control of disinfection byproducts formation with VUV/UV/NaClO system
WANG Ying-ying1, LIU Ya1, MA De-fang1, SHI Wei-ye1,2, GAO Bao-yu1
1. School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China; 2. No. 1 Institute of Geology and Mineral Resources of Shandong Province, Ji' nan 250014, China
Abstract：This study investigates the removal efficiency of sulfamethoxazole (SMX) and the formation of haloacetic acids (HAAs) during disinfection using the VUV/UV/NaClO process. The impact of various factors, including the light source, co-existing anions, and dissolved organic matter were examined. Anions (bromine ion, sulphate), low concentrations (£3mg/L, as TOC) of polysaccharides and proteins had limited effects on SMX degradation. However, at a high protein concentration (30mg/L, as TOC), the efficiency of SMX degradation decreased from 100% to 53.5%. Additionally, as the humic acid concentration increased from 0to 30mg/L, while SMX could still be completely degraded after 30minutes, the degradation rate and mineralization percentage decreased by 68% and 43.9%, respectively. The presence of bromine ions and humic acid significantly promoted the formation of HAAs. Compared to UV/NaClO, the VUV/UV/NaClO process exhibited similar SMX degradation performance but increased the mineralization percentage by 44%. Furthermore, it reduced the production and the toxicity risk value (TRV) of HAAs by 98% and 96.5%, respectively. In conclusion, the VUV/UV/NaClO process shows promise as an improved water disinfection method compared to UV/NaClO. It has significant potential for applications in wastewater reclamation.
王营营, 刘娅, 马德方, 史伟业, 高宝玉. VUV/UV/NaClO去除水中抗生素并控制消毒副产物[J]. 中国环境科学, 2023, 43(S1): 88-94.
WANG Ying-ying, LIU Ya, MA De-fang, SHI Wei-ye, GAO Bao-yu. Removal of antibiotics and control of disinfection byproducts formation with VUV/UV/NaClO system. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(S1): 88-94.
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