Removal of tetracycline by denitrifying Mn(II)-oxidizing bacterium Pseudomonas sp. H117 and biomaterials (BMO and MBMO): Efficiency and mechanisms

被引：82
作者：
Bai, Yihan [1 ]
Su, Junfeng [1 ,2 ]
Wen, Qiong [1 ]
Li, GuoQing [1 ]
Xue, Lei [1 ]
Huang, Tinglin [1 ,2 ]
机构：
[1] Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Peoples R China
[2] Xian Univ Architecture & Technol, Shaanxi Key Lab Environm Engn, Xian 710055, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2020年 / 312卷
基金：
中国国家自然科学基金;
关键词：
Tetracycline; Denitrifying Mn(II)-oxidizing bacterium; Biomaterial; Mn(III) oxidative; Adsorption; MANGANESE-OXIDIZING BACTERIUM; ANTIBIOTICS; DEGRADATION; ADSORPTION; OXIDES; COMPOSITE; CIPROFLOXACIN; CONTAMINANTS; GROUNDWATER; ACTIVATION;
D O I：
10.1016/j.biortech.2020.123565
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Coexistence of multiple pollutants such as antibiotic, nitrate and heavy metal has received increasing attention resently. In this study, the functions of Pseudomonas sp.H117 on the removal of tetracycline(TC), nitrate and Mn (II), and biological materials (BMO(biogenic manganese oxides), MBMO(magnetic BMO)) on the removal of TC were investigated. Strain H117 showed higher TC removal efficiency of 68.86% (0.071 mg.L-1.h(-1)) within 96 h. Meanwhile, NO3-N and Mn(II) achieved high removal efficiency of 100% (0.211 mg.L-1.h(-1)) and 64.64% (0.265 mg.L-1.h(-1)), respectively. Furthermore, trapping experiments testified that Mn(III) intermediate formed during the biological manganese oxidation process, which contribute to the TC degradation. 91.29% and 96.63% of TC removal efficiency within 12 h were achieved by BMO and MBMO. Moreover, XPS, FTIR spectra, kinetics analysis and adsorption isotherms elucidated Mn(III) oxidation, chemical adsorption and ligand exchange reactions contribute to the removal of TC by biomaterials.
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页数：9
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