期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 460, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2023.132388
关键词
Antibiotic resistance genes; Pathogenic bacteria; Magnetic biochar/quaternary phosphonium; salt; Leafy vegetable
Antibiotic resistance genes (ARGs) and human pathogenic bacteria (HPB) in leafy vegetable pose a potential risk to public health. Traditional disinfection technologies and a new technology called MBQ spraying are effective in reducing the presence of ARGs and HPB in soil and on the leaf surface.
Antibiotic resistance genes (ARGs) and human pathogenic bacteria (HPB) in leafy vegetable is a matter of concern as they can be transferred from soil, atmosphere, and foliar sprays, and poses a potential risk to public health. While traditional disinfection technologies are effective in reducing the presence of ARGs and HPB in soil. A new technology, foliar spraying with magnetic biochar/quaternary ammonium salt (MBQ), was demonstrated and applied to the leaf surface. High-throughput quantitative PCR targeting 96 valid ARGs and 16 S rRNA sequencing were used to assess its efficacy in reducing ARGs and HPB. The results showed that spraying MBQ reduced 97.0 & PLUSMN; 0.81% of high-risk ARGs, associated with seven classes of antibiotic resistance in pakchoi leaves within two weeks. Water washing could further reduce high-risk ARGs from pakchoi leaves by 19.8% 24.6%. The relative abundance of HPB closely related to numerous ARGs was reduced by 15.2 & PLUSMN; 0.23% with MBQ application. Overall, this study identified the potential risk of ARGs from leafy vegetables and clarified the significant implications of MBQ application for human health as it offers a promising strategy for reducing ARGs and HPB in leafy vegetables.
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