微塑料
地表水
微生物
粪肠球菌
环境科学
压电
灭菌(经济)
水流
细菌
环境化学
微生物学
环境工程
化学
材料科学
生物
复合材料
经济
外汇市场
货币经济学
金黄色葡萄球菌
遗传学
外汇
作者
Shenyu Lan,Xiwang Ke,Zhi Li,Lei Mai,Mingshan Zhu,Eddy Y. Zeng
出处
期刊:ACS ES&T water
[American Chemical Society]
日期:2022-01-12
卷期号:2 (2): 367-375
被引量:30
标识
DOI:10.1021/acsestwater.1c00411
摘要
The presence of microplastics in the aquatic environment, as a vector for colonization and proliferation of harmful microorganisms, brings a great challenge for water disinfection. This study investigates piezoelectric inactivation of Gram-negative bacteria Escherichia coli (E. coli) and Gram-positive bacteria Enterococcus faecalis (E. faecalis) on the surface of microplastics under water flow by using molybdenum disulfide as piezoelectric material. The piezoelectric sterilization capacity was evaluated by comparing different polymer types and sizes of microplastics, in which 4.5 log10 CFU mL–1 E. coli cells were reduced for 50 μm PVC particles at a water flow speed of 80 rpm in 20 min. Piezoelectric disinfection was dependent on water flow rates and treatment time and was feasible in riverine water containing authentic microplastics and in a spiral reactor that simulated natural water flow. Reactive oxygen species were generated via water flowing over the piezoelectric material, resulting in the inactivation of bacteria on the surface of microplastics. This study highlighted the great potential of water flow as a "green" source of energy and elucidated a new opportunity of piezoelectric disinfection in aqueous media containing microplastics.
科研通智能强力驱动
Strongly Powered by AbleSci AI