In this study, magnesium and coconut shell carbon (CSC) were prepared by a ball milled process and used for water disinfection with adsorbing tiny amounts of copper(II). Dissolved oxygen (DO) was reduced to hydrogen p...In this study, magnesium and coconut shell carbon (CSC) were prepared by a ball milled process and used for water disinfection with adsorbing tiny amounts of copper(II). Dissolved oxygen (DO) was reduced to hydrogen peroxide (H_(2)O_(2)) via a two-electron pathway by Mg corrosion. Cu(II) in the wastewater will be enriched on the CSC surface and efficiently catalyzes H2O2 for inactivating E. coli. The results show that E. coli with an initial concentration of approximately 106 CFU/mL was under the detection limit (<4 CFU/mL) within 15 min. All of the Cu(II) could be adsorbed by the composite and catalyzed H2O2 to different active species. The quenching experiments, electron spin resonance (ESR) capture measurements and the UV-vis spectroscopy detection confirmed the present of the hydroxyl radicals (·OH), superoxide radicals (·O_(2)^(-)) and Cu(III). Different with tradition Fenton like process, Cu(III), rather than radicals, played the major role during the Mg-CSC/Cu(II) process. In addition to the cellular membrane damage, most of the bacterial genomic DNA was also be degraded and the bacterial reactivation was avoided. The Mg-CSC/Cu(II) process also showed a satisfied disinfection performance in real wastewater treatment. Overall, this study provides a new strategy for water disinfection.展开更多
In the version of the article originally published in the volume 62,issue 10,2019 of Sci.China Mater,(page 1470-1478,https://doi.org/10.1007/s40843-019-9437-9),wrong images of Figs 3 and 4 were used.The corrected vers...In the version of the article originally published in the volume 62,issue 10,2019 of Sci.China Mater,(page 1470-1478,https://doi.org/10.1007/s40843-019-9437-9),wrong images of Figs 3 and 4 were used.The corrected version appears below:the units of the x-axes in Fig.3h,the inset of Fig.4a,and Fig.4b,d should be h,s,s,and s,respectively.展开更多
基金the National Natural Science Foundation of China (No. 22006016)the Key Project of Fujian Provincial Department of Science and Technology (Nos. 2021Y0009 and 2019Y0010)the Natural Science Foundation of Fujian Province, China (No. 2021J011026).
文摘In this study, magnesium and coconut shell carbon (CSC) were prepared by a ball milled process and used for water disinfection with adsorbing tiny amounts of copper(II). Dissolved oxygen (DO) was reduced to hydrogen peroxide (H_(2)O_(2)) via a two-electron pathway by Mg corrosion. Cu(II) in the wastewater will be enriched on the CSC surface and efficiently catalyzes H2O2 for inactivating E. coli. The results show that E. coli with an initial concentration of approximately 106 CFU/mL was under the detection limit (<4 CFU/mL) within 15 min. All of the Cu(II) could be adsorbed by the composite and catalyzed H2O2 to different active species. The quenching experiments, electron spin resonance (ESR) capture measurements and the UV-vis spectroscopy detection confirmed the present of the hydroxyl radicals (·OH), superoxide radicals (·O_(2)^(-)) and Cu(III). Different with tradition Fenton like process, Cu(III), rather than radicals, played the major role during the Mg-CSC/Cu(II) process. In addition to the cellular membrane damage, most of the bacterial genomic DNA was also be degraded and the bacterial reactivation was avoided. The Mg-CSC/Cu(II) process also showed a satisfied disinfection performance in real wastewater treatment. Overall, this study provides a new strategy for water disinfection.
基金mainly supported by the National Key Research and Development Program of China(2017YFA0205700)the National Natural Science Foundation of China(NSFC,61774133 and 6147409)Partial support from the NSFC for Innovative Research Groups(61721005)
文摘In the version of the article originally published in the volume 62,issue 10,2019 of Sci.China Mater,(page 1470-1478,https://doi.org/10.1007/s40843-019-9437-9),wrong images of Figs 3 and 4 were used.The corrected version appears below:the units of the x-axes in Fig.3h,the inset of Fig.4a,and Fig.4b,d should be h,s,s,and s,respectively.
