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Combination of bacitracin-based flocculant and surface enhanced Raman scattering labels for flocculation, identification and sterilization of multiple bacteria in water treatment
Zhang, Shixin; Tang, Xiaomin; Zheng, Huaili; Wang, Dongsheng; Xie, Zongli; Ding, Wei; Zheng, Xinyu
2021-04-05
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume407Pages:-
AbstractBacteria, especially antibiotic-resistant bacteria, in water threaten public health in countries. Simultaneous flocculation, sterilization and identification of bacteria are great challenge in water treatment. Herein we presented a three-in-one compound through combining a novel Bacitracin-based flocculant (B-g-PAMDAC) and surface enhanced Raman scattering (SERS) labels, the modified Au@AgNPs using graphene oxide (GO) and 4-mercaptophenylboronic acid (4-MPBA). B-g-PAMDAC with bactericidal groups and microblock structure was synthesized via copolymerization and self-assembly. Its functional groups and microblock structure contributed to the excellent performance in flocculation of bacteria. 4-MPBA as bacterial capture bound to the bacterial cell membrane and contributed to recognition of bacteria in flocculation. Bacteria aggregating around Au@AgNPs resulted in abundant hot spots and strong Raman signals. SERS labels obviously improved the sensitivity, accuracy and stability of bacteria identification even at low bacterial concentration of 1 x 10(3) CFU mL(-1). They presented distinct fingerprints of bacteria, Escherichia coli, Pseudomonas aeruginosa, Bacillus cereus and Enterococcus faecalis, in Raman mappings. Bacitracin improved sterilization efficiency of B-g-PAMDAC in four bacteria treatment in terms of sterilization rate and time. beta-galactosidase and respiratory activity of bacteria revealed sterilization mechanism of B-g-PAMDAC that changed permeability of cell membrane before it reduced the respiration activity of bacteria and ruptured cell wall.
Department环境水质学国家重点实验室
KeywordFlocculation SERS labels Fingerprint peak Identification Sterilization mechanism
WOS Research AreaEngineering, Environmental ; Environmental Sciences
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45920
Collection环境水质学国家重点实验室
Affiliation1.Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, State Minist Educ, Chongqing 400045, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
3.CSIRO Mfg, Private Bag 10, Clayton, Vic 3169, Australia
4.Chongqing Technol & Business Univ, Chongqing Key Lab Catalysis & New Environm Mat, Coll Environm & Resources, Chongqin
Recommended Citation
GB/T 7714
Zhang, Shixin,Tang, Xiaomin,Zheng, Huaili,et al. Combination of bacitracin-based flocculant and surface enhanced Raman scattering labels for flocculation, identification and sterilization of multiple bacteria in water treatment[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,407:-.
APA Zhang, Shixin.,Tang, Xiaomin.,Zheng, Huaili.,Wang, Dongsheng.,Xie, Zongli.,...&Zheng, Xinyu.(2021).Combination of bacitracin-based flocculant and surface enhanced Raman scattering labels for flocculation, identification and sterilization of multiple bacteria in water treatment.JOURNAL OF HAZARDOUS MATERIALS,407,-.
MLA Zhang, Shixin,et al."Combination of bacitracin-based flocculant and surface enhanced Raman scattering labels for flocculation, identification and sterilization of multiple bacteria in water treatment".JOURNAL OF HAZARDOUS MATERIALS 407(2021):-.
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