Ferrous chelate absorption is deemed a promising method for NO removal from flue gas, but the key problem is the difficulty to regenerate the absorption solution, i.e. the complexes of FeII(EDTA)NO and FeIII(EDTA) in ...Ferrous chelate absorption is deemed a promising method for NO removal from flue gas, but the key problem is the difficulty to regenerate the absorption solution, i.e. the complexes of FeII(EDTA)NO and FeIII(EDTA) in the solution. Two bacterial strains isolated recently from the sludge of the denitrification step of a municipal wastewater treatment plant could be applied effectively to regenerate the absorbent were Pseudomonas sp. and klebsiella trevisan sp. Pseudomonas sp. exhibited high reduction ability on FeII(EDTA)NO and the klebsiella trevisan sp. was more suitable for FeIII(EDTA) re-duction.展开更多
A new modified glassy carbon electrode(GCE)with grafted polymer(GP)/SiO_(2)nanoparticles(SiO_(2)NPs)were prepared using mechanical attachment method to produce a new sensor in cyclic voltammetric technique.The new wor...A new modified glassy carbon electrode(GCE)with grafted polymer(GP)/SiO_(2)nanoparticles(SiO_(2)NPs)were prepared using mechanical attachment method to produce a new sensor in cyclic voltammetric technique.The new working electrode GP/SiO_(2)NPs/GCE was characterized by a standard solution of 1 mM K_(4)[Fe(CN)_(6)]with 1 M K_(2)HPO_(4) as an electrolyte to study the redox current peaks of FeⅡ/FeⅢions at different concentrations such as scan rate,pH,determination of diffusion coefficient(D_(f)),reliability and stability of the modified GCE.It was found that the new modified electrode enhanced the redox current peaks of FeⅡ/FeⅢfrom 12μA to 20μA and-5μA to-15μA for oxidation and reduction peaks in GCE,repectevely.So,the current ratio(Ipa/Ipc)for the new modified electrode was 1,and the potential peak separation(ΔEpa-c)was 100 mV,which indicated good electrochemical properties as an irreversible electrode and heterogeneous reaction.Good reliability and stability of modified GCE was obseved with low detection limit.Scanning electron microscopy(SEM)and atomic force microscopy(AFM)analysis of the nano-deposit was also studied.展开更多
文摘Ferrous chelate absorption is deemed a promising method for NO removal from flue gas, but the key problem is the difficulty to regenerate the absorption solution, i.e. the complexes of FeII(EDTA)NO and FeIII(EDTA) in the solution. Two bacterial strains isolated recently from the sludge of the denitrification step of a municipal wastewater treatment plant could be applied effectively to regenerate the absorbent were Pseudomonas sp. and klebsiella trevisan sp. Pseudomonas sp. exhibited high reduction ability on FeII(EDTA)NO and the klebsiella trevisan sp. was more suitable for FeIII(EDTA) re-duction.
文摘A new modified glassy carbon electrode(GCE)with grafted polymer(GP)/SiO_(2)nanoparticles(SiO_(2)NPs)were prepared using mechanical attachment method to produce a new sensor in cyclic voltammetric technique.The new working electrode GP/SiO_(2)NPs/GCE was characterized by a standard solution of 1 mM K_(4)[Fe(CN)_(6)]with 1 M K_(2)HPO_(4) as an electrolyte to study the redox current peaks of FeⅡ/FeⅢions at different concentrations such as scan rate,pH,determination of diffusion coefficient(D_(f)),reliability and stability of the modified GCE.It was found that the new modified electrode enhanced the redox current peaks of FeⅡ/FeⅢfrom 12μA to 20μA and-5μA to-15μA for oxidation and reduction peaks in GCE,repectevely.So,the current ratio(Ipa/Ipc)for the new modified electrode was 1,and the potential peak separation(ΔEpa-c)was 100 mV,which indicated good electrochemical properties as an irreversible electrode and heterogeneous reaction.Good reliability and stability of modified GCE was obseved with low detection limit.Scanning electron microscopy(SEM)and atomic force microscopy(AFM)analysis of the nano-deposit was also studied.
