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Removal of tetracycline by ultraviolet/sodium percarbonate (UV/SPC) advanced oxidation process in water
被引:11
作者:
Zhao, Liangyu
[1
]
Zhao, Yang-Guo
[1
,2
]
Jin, Chunji
[1
,2
]
Yang, Dexiang
[1
]
Zhang, Yanan
[1
]
Progress, Mupindu
[1
]
机构:
[1] Ocean Univ China, Coll Environm Sci & Engn, Shandong Prov Key Lab Marine Environm & Geol Engn, Qingdao 266100, Peoples R China
[2] Ocean Univ China, Key Lab Marine Environm Sci & Ecol, Minist Educ, Qingdao 266100, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Ultraviolet;
Sodium percarbonate;
Tetracycline;
Free radical;
Degradation rate;
HUMIC-ACID;
DEGRADATION;
KINETICS;
OXYTETRACYCLINE;
NITRATE;
PEROXYMONOSULFATE;
SULFAMETHOXAZOLE;
ANTIBIOTICS;
ACTIVATION;
PERSULFATE;
D O I:
10.1016/j.envres.2024.118260
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
Tetracycline (TC) was widely used and frequently detected in various water bodies, where the presence of TC posed a significant threat to the health of aquatic organisms. Furthermore, antibiotics were hardly degraded by biological treatment. Thus, in order to enhance the removal of TC, we proposed the use of a novel ultraviolet/ sodium percarbonate (UV/SPC) advanced oxidation process and initiated an in-depth study. The study investigated the influence of oxidant dosage, initial pH, UV intensity, and TC concentration on the removal of TC. The results demonstrated that the UV/SPC system efficiently removed TC, with removal efficiency increasing as the SPC concentration increased. Within the pH range of 3-11, TC degradation exhibited minimal variation, indicating the UV/SPC system's strong adaptability to pH variations. The research on the impact of the water matrix on TC removal revealed that HCO3- had an inhibitory effect on TC degradation, while NO3- promoted TC degradation. Additionally, the presence of free radical species (center dot OH, center dot CO3- , center dot O2- ) were detected and rate constants for the secondary reactions (k center dot OH,TC = 6.3 x 109 L mol- 1 center dot s- 1, k center dot CO3-,TC = 3.4 x 108 L mol- 1 center dot s- 1) were calculated, indicating that center dot OH exhibited a stronger oxidative performance compared to center dot CO3- . This study did not only present a novel strategy via UV/SPC to remove TC but also uncovered the unique role of center dot CO3- for contaminant removal.
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页数:11
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