TY - JOUR
T1 - Rice straw particles covered with Brevundimonas naejangsanensis DD1 cells can synergistically remove doxycycline from water using adsorption and biotransformation
AU - He, Ting
AU - Bao, Jianguo
AU - Leng, Yifei
AU - Kong, Shuqiong
AU - Du, Jiangkun
AU - Li, Xu
N1 - Funding Information:
The authors would like to thank the financial support from the National Natural Science Foundation of China ( 41373083 and 42077312 ), National Key R&D Program – International S&T Development ( 2021YFE0106600 ), and the National Science Foundation ( 1351676 and 1805990 ).
Funding Information:
The authors would like to thank the financial support from the National Natural Science Foundation of China (41373083 and 42077312), National Key R&D Program ? International S&T Development (2021YFE0106600), and the National Science Foundation (1351676 and 1805990).
Publisher Copyright:
© 2021
PY - 2022/3
Y1 - 2022/3
N2 - Doxycycline (DC) is a second generation tetracycline antibiotic and its occurrence in the aquatic environment due to the discharge of municipal and agricultural wastes has called for technologies to effectively remove DC from water. The objective of the study was to characterize the synergistic benefits of adsorption and biotransformation in removing DC from water using rice straw particles (RSPs) covered with DC degrading bacteria, Brevundimonas naejangsanensis strain DD1. First, optimal experimental conditions were identified for individual processes, i.e., hydrolysis, adsorption, and biotransformation, in terms of their performance of removing DC from water. Then, synergistic effects between adsorption and biotransformation were demonstrated by adding DD1-covered RSPs (DD1-RSPs) to DC-containing solution. Results suggest that DC was quickly adsorbed onto RSPs and the adsorbed DC was subsequently biotransformed by the DD1 cells on RSPs. The adsorption of DC to DD1-RSPs can be well described using the pseudo-second-order kinetics and the Langmuir isotherm. The DD1 cells on RSPs converted DC to several biotransformation products through a series of demethylation, dehydration, decarbonylation, and deamination. This study demonstrated that adsorption and biotransformation could work synergistically to remove DC from water.
AB - Doxycycline (DC) is a second generation tetracycline antibiotic and its occurrence in the aquatic environment due to the discharge of municipal and agricultural wastes has called for technologies to effectively remove DC from water. The objective of the study was to characterize the synergistic benefits of adsorption and biotransformation in removing DC from water using rice straw particles (RSPs) covered with DC degrading bacteria, Brevundimonas naejangsanensis strain DD1. First, optimal experimental conditions were identified for individual processes, i.e., hydrolysis, adsorption, and biotransformation, in terms of their performance of removing DC from water. Then, synergistic effects between adsorption and biotransformation were demonstrated by adding DD1-covered RSPs (DD1-RSPs) to DC-containing solution. Results suggest that DC was quickly adsorbed onto RSPs and the adsorbed DC was subsequently biotransformed by the DD1 cells on RSPs. The adsorption of DC to DD1-RSPs can be well described using the pseudo-second-order kinetics and the Langmuir isotherm. The DD1 cells on RSPs converted DC to several biotransformation products through a series of demethylation, dehydration, decarbonylation, and deamination. This study demonstrated that adsorption and biotransformation could work synergistically to remove DC from water.
KW - Adsorption
KW - Biotransformation
KW - Doxycycline
KW - Rice straw particles
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U2 - 10.1016/j.chemosphere.2021.132828
DO - 10.1016/j.chemosphere.2021.132828
M3 - Article
C2 - 34762878
AN - SCOPUS:85118971840
SN - 0045-6535
VL - 291
JO - Chemosphere
JF - Chemosphere
M1 - 132828
ER -