|Table of Contents|

Effects of Lomefloxacin Hydrochloride Input Modes on Denitrification Process in Water(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2022年第01期
Page:
78-90
Research Field:
水资源与水文地质
Publishing date:

Info

Title:
Effects of Lomefloxacin Hydrochloride Input Modes on Denitrification Process in Water
Author(s):
YANG Mei-ping1; 2;  HE Jiang-tao1; 2*;  ZOU Hua1; 2;  DENG Lu1; 2;  ZHANG Jin-gang1; 2
(1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China; 2. Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China)
Keywords:
water environment;  denitrification;  input mode;  lomefloxacin hydrochloride;  microbial number;  microbial activity;  microbial community;  ARGs
PACS:
X52; X703
DOI:
10.19814/j.jese.2021.09043
Abstract:
To investigate the effects of antibiotic input modes on denitrification process in the environment, lomefloxacin hydrochloride(LOM)was selected as representative antibiotic, and nano-emulsified vegetable oil was used as carbon source to carry out denitrification simulation experiments. Different combination methods of LOM concentrations(200 ng·L-1 and 2 mg·L-1)and input modes(once- and twice-input)were used in the experiment. The results show that the inhibition on NO-3-N reduction in high-concentration system is higher than that in low-concentration system with the same input mode. Under the same concentration and different input modes, the inhibitory effect of once-input system on NO-3-N reduction is stronger than that of twice-input system, with longer half-lives and lower maximum reduction rate. In addition, the influence of input modes is more obvious in high concentration condition. The relative inhibition rate of high-concentration system on NO-3-N reduction is about 25.9% higher than that of low-concentration system. Also, the number, activity and richness of microorganisms confirm that once-input system have a greater impact than twice-input system under the high concentration condition. But there are no obviously response of microorganisms at low concentration condition. Furthermore, the changes of microbial community and ARGs are not significantly related to input modes, which are believed to be related to the delayed response of microbial community and ARGs. From the primary study, it is believed that the difference of denitrification process caused by the different input modes of antibiotics in soil and water environment could not be ignored, especially under the condition of high concentration.

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Last Update: 2022-02-25