Many waterborne diseases are related with viruses,and COVID-19 worldwide has raised the concern of virus security in water into the public horizon.Compared to other conventional water treatment processes,membrane tech...Many waterborne diseases are related with viruses,and COVID-19 worldwide has raised the concern of virus security in water into the public horizon.Compared to other conventional water treatment processes,membrane technology can achieve satisfactory virus removal with fewer chemicals,and prevent the outbreaks of viruses to a maximal extent.Researchers developed new modification methods to improve membrane performance.This review focused on the membrane modifications that enhance the performance in virus removal.The characteristics of viruses and their removal by membrane filtration were briefly generalized,and membrane modifications were systematically discussed through different virus removal mechanisms,including size exclusion,hydrophilic and hydrophobic interactions,electronic interactions,and inactivation.Advanced functional materials for membrane modification were summarized based on their nature.Furthermore,it is suggested that membranes should be enhanced through different mechanisms mainly based on their ranks of pore size.The current review provided theoretical support regarding membrane modifications in the enhancement of virus removal and avenues for practical application.展开更多
We have developed a new nanofilter using a carbon nanotube-silver composite material that is capable of efficiently removing waterborne viruses and bacteria.The nanofilter was subjected to plasma surface treatment to ...We have developed a new nanofilter using a carbon nanotube-silver composite material that is capable of efficiently removing waterborne viruses and bacteria.The nanofilter was subjected to plasma surface treatment to enhance its flow rate,which was improved by approximately 62%.Nanoscale pores were obtained by fabricating a carbon nanotube network and using nanoparticle fixation technology for the removal of viruses.The pore size of the nanofilter was approximately 38 nm and the measured flow rate ranged from 21.0 to 97.2 L/（min·m^2）under a pressure of 1–6 kgf/cm^2 when the amount of loaded carbon nanotube-silver composite was 1.0 mg/cm^2.The nanofilter was tested against Polio-,Noro-,and Coxsackie viruses using a sensitive real-time polymerase chain reaction assay to detect the presence of viral particles within the outflow.No trace of viruses was found to flow through the nanofilter with carbon nanotube-silver composite loaded above 0.8 mg/cm^2.Moreover,the surface of the filter has antibacterial properties to prevent bacterial clogging due to the presence of 20-nm silver nanoparticles,which were synthesized on the carbon nanotube surface.展开更多
基金supported by the National Natural Science Foundation of China(No.52070058)the Heilongjiang Touyan Innovation Team Program(No.HIT-SE-01)+1 种基金the State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology)(No.2021TS17)the Natural Science Foundation of Heilongjiang Province(No.YQ2020E020).
文摘Many waterborne diseases are related with viruses,and COVID-19 worldwide has raised the concern of virus security in water into the public horizon.Compared to other conventional water treatment processes,membrane technology can achieve satisfactory virus removal with fewer chemicals,and prevent the outbreaks of viruses to a maximal extent.Researchers developed new modification methods to improve membrane performance.This review focused on the membrane modifications that enhance the performance in virus removal.The characteristics of viruses and their removal by membrane filtration were briefly generalized,and membrane modifications were systematically discussed through different virus removal mechanisms,including size exclusion,hydrophilic and hydrophobic interactions,electronic interactions,and inactivation.Advanced functional materials for membrane modification were summarized based on their nature.Furthermore,it is suggested that membranes should be enhanced through different mechanisms mainly based on their ranks of pore size.The current review provided theoretical support regarding membrane modifications in the enhancement of virus removal and avenues for practical application.
文摘We have developed a new nanofilter using a carbon nanotube-silver composite material that is capable of efficiently removing waterborne viruses and bacteria.The nanofilter was subjected to plasma surface treatment to enhance its flow rate,which was improved by approximately 62%.Nanoscale pores were obtained by fabricating a carbon nanotube network and using nanoparticle fixation technology for the removal of viruses.The pore size of the nanofilter was approximately 38 nm and the measured flow rate ranged from 21.0 to 97.2 L/（min·m^2）under a pressure of 1–6 kgf/cm^2 when the amount of loaded carbon nanotube-silver composite was 1.0 mg/cm^2.The nanofilter was tested against Polio-,Noro-,and Coxsackie viruses using a sensitive real-time polymerase chain reaction assay to detect the presence of viral particles within the outflow.No trace of viruses was found to flow through the nanofilter with carbon nanotube-silver composite loaded above 0.8 mg/cm^2.Moreover,the surface of the filter has antibacterial properties to prevent bacterial clogging due to the presence of 20-nm silver nanoparticles,which were synthesized on the carbon nanotube surface.
