More and more antibiotics that are difficult to biodegrade have been detected in water environments threatening ecosystems and human health.Therefore,it is urgent to develop efficient water treatment methods to degrad...More and more antibiotics that are difficult to biodegrade have been detected in water environments threatening ecosystems and human health.Therefore,it is urgent to develop efficient water treatment methods to degrade antibiotics.In this work,Co-Fe Prussian blue analogues(PBAs)with different molar ratios were synthesized for peroxymonosulfate(PMS)activation to degrade sulfacetamide(SAM,10 mg/L).By increasing Co molar ratio,the PMS activation capability and electrochemical properties of PBAs were enhanced.Due to its excellent reactivity(degradation efficiency of 84.2%and mineralization efficiency of 52.79%),cost benefit(electrical energy per order,0.01019 k Wh/L)and lower metal leaching([Co]=0.259 mg/L,[Fe]=0.128 mg/L),PBA-1,the as-prepared catalyst with a molar ratio of cobalt to iron of 1:1,was selected for further study.The radical scavenging experiments and an electron paramagnetic resonance(EPR)trapping experiments were performed and revealed that PBA-1 addition was required to produced·OH and SO_(4)^(·-)from PMS activation.Accordingly,we proposed a PMS activation mechanism and SAM decomposition pathways for PBA-1/PMS reaction system.Besides,a PBA-1@polyvinylidene fluoride(PVDF)catalytic membrane was further prepared to expand the application potential of PBA nanoparticles.The PBA-1@PVDF catalytic membrane was highly effective and exhibited a great reusability;thus,it could be considered for applications in actual water treatment processes.展开更多
New series of Ag, Cd(II), Ce(III), Co(II), Cr(III), Fe(III), Ni(II) and Pb(II) complexes with (E)-N-(4-(2- hydroxybenzylideneamino) phenylsulfonyl) {S.S} have been synthesized. These compounds have been characterized ...New series of Ag, Cd(II), Ce(III), Co(II), Cr(III), Fe(III), Ni(II) and Pb(II) complexes with (E)-N-(4-(2- hydroxybenzylideneamino) phenylsulfonyl) {S.S} have been synthesized. These compounds have been characterized by different physico-chemical techniques like, melting point, elemental analysis, FT-IR, UV spectroscopy, <sup>1</sup>H NMR spectroscopy, conductance measurements, magnetic susceptibility and mass spectral analysis. The metal ions concentrations have been determined using inductively coupled plasma mass spectrometry (ICP-MS). Spectroscopic studies suggest coordination most of complexes in a regular octahedral arrangement in 2L:1M molar ratio by two N azomethine and two OH phenolic from Schiff base {S.S} in the form of [ML<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>], M metal, L ligand {S.S}. Complexes have been screened for their antibacterial {Gram negative bacteria (Escherichia coli and Pseudomonas aeruginosa)}, {Gram positive bacteria (Bacillus subtilis and Sterptococcus pneumoniae)} and antifungal (Aspergillus fumigates and Candida albicans) showing promising antimicrobial biological activity.展开更多
基金funded by National Natural Science Foundation of China(No.51978319)Outstanding Youth Foundation of Gansu Province(No.20JR10RA651)+2 种基金Natural Science Foundation of Xinjiang Uygur Autonomous Region(No.2022D01C333)Science and Technology Project of Yili Kazak Autonomous Prefecture in 2022(No.YZ2022Y003)Research and Innovation Team Cultivation Program of Yili Normal University(No.CXZK2021004)。
文摘More and more antibiotics that are difficult to biodegrade have been detected in water environments threatening ecosystems and human health.Therefore,it is urgent to develop efficient water treatment methods to degrade antibiotics.In this work,Co-Fe Prussian blue analogues(PBAs)with different molar ratios were synthesized for peroxymonosulfate(PMS)activation to degrade sulfacetamide(SAM,10 mg/L).By increasing Co molar ratio,the PMS activation capability and electrochemical properties of PBAs were enhanced.Due to its excellent reactivity(degradation efficiency of 84.2%and mineralization efficiency of 52.79%),cost benefit(electrical energy per order,0.01019 k Wh/L)and lower metal leaching([Co]=0.259 mg/L,[Fe]=0.128 mg/L),PBA-1,the as-prepared catalyst with a molar ratio of cobalt to iron of 1:1,was selected for further study.The radical scavenging experiments and an electron paramagnetic resonance(EPR)trapping experiments were performed and revealed that PBA-1 addition was required to produced·OH and SO_(4)^(·-)from PMS activation.Accordingly,we proposed a PMS activation mechanism and SAM decomposition pathways for PBA-1/PMS reaction system.Besides,a PBA-1@polyvinylidene fluoride(PVDF)catalytic membrane was further prepared to expand the application potential of PBA nanoparticles.The PBA-1@PVDF catalytic membrane was highly effective and exhibited a great reusability;thus,it could be considered for applications in actual water treatment processes.
文摘New series of Ag, Cd(II), Ce(III), Co(II), Cr(III), Fe(III), Ni(II) and Pb(II) complexes with (E)-N-(4-(2- hydroxybenzylideneamino) phenylsulfonyl) {S.S} have been synthesized. These compounds have been characterized by different physico-chemical techniques like, melting point, elemental analysis, FT-IR, UV spectroscopy, <sup>1</sup>H NMR spectroscopy, conductance measurements, magnetic susceptibility and mass spectral analysis. The metal ions concentrations have been determined using inductively coupled plasma mass spectrometry (ICP-MS). Spectroscopic studies suggest coordination most of complexes in a regular octahedral arrangement in 2L:1M molar ratio by two N azomethine and two OH phenolic from Schiff base {S.S} in the form of [ML<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>], M metal, L ligand {S.S}. Complexes have been screened for their antibacterial {Gram negative bacteria (Escherichia coli and Pseudomonas aeruginosa)}, {Gram positive bacteria (Bacillus subtilis and Sterptococcus pneumoniae)} and antifungal (Aspergillus fumigates and Candida albicans) showing promising antimicrobial biological activity.
