ORIGINAL RESEARCH
Adsorption and Hydrolysis Characteristics
of Antibiotics in the Hyporheic Zone
of Zaohe-Weihe River, China
| 1 | Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Ministry of Education, Chang’an University,
Xi’an 710054, China |
| 2 | School of Water and Environment, Chang’an University, Xi’an 710054, China |
| 3 | China United Northwest Institute for Engineering Design and Research Co., Ltd., Xi’an 710077, China |
CORRESPONDING AUTHOR
Shengke Yang
Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang’an University, Xi’an 710054, P. R. China, Yanta District No.126, Chang’an University, Xi'an , 710064, Xi'an, China
Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang’an University, Xi’an 710054, P. R. China, Yanta District No.126, Chang’an University, Xi'an , 710064, Xi'an, China
Submission date: 2021-10-21
Final revision date: 2021-12-28
Acceptance date: 2022-01-20
Online publication date: 2022-05-20
Publication date: 2022-07-12
Pol. J. Environ. Stud. 2022;31(4):3893–3908
KEYWORDS
TOPICS
ABSTRACT
To reveal the attenuation characteristics of antibiotics in completely different physical and chemical
environments formed when surface water and groundwater complement each other, this paper selected
the hyporheic zone of Zaohe-Weihe rivers as the study area, explored the adsorption and hydrolysis
behavior of oxytetracycline (OTC), norfloxacin (NOR) and sulfamethoxazole (SMZ) by simulating
the hyporheic zone. Results showed that the maximum adsorption capacity of the three antibiotics
on sediment was SMZ (1008.14 mg/kg)>OTC (430.03 mg/kg)>NOR (128.47 mg/kg). The adsorption
processes all were consistent with the Freundlich model. The hydrolysis rate of the three antibiotics in
surface water was 2-10 times that in groundwater. In surface water, the half-lives of the three antibiotics
were OTC (9.75 d)>SMZ (11.2 d)>NOR (14.2 d), respectively. In groundwater, the half-lives were OTC
(14.78 d)>NOR (63.59 d)>SMZ (117.48 d), respectively. The hydrolysis rate of the three antibiotics under
alkaline conditions was significantly greater than acidic and neutral conditions. High temperature and
the adding of sediment or clay were conducive to the hydrolysis of antibiotics.
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