This study investigated practical and simultaneous removal of cesium (Cs, initial concentration of 5 mg/L) and strontium (Sr, initial concentration of 5 mg/L) using a photosynthetic bacterium, Rhodobacter sphaeroides ...This study investigated practical and simultaneous removal of cesium (Cs, initial concentration of 5 mg/L) and strontium (Sr, initial concentration of 5 mg/L) using a photosynthetic bacterium, Rhodobacter sphaeroides SSI, immobilized on recovery-type porous ceramic made from glass waste. When 4 - 8 pieces /L of SSI immobilized ceramic were added to synthetic sewage wastewater containing glucose, almost 100% of Cs and 57% - 61% removal of Sr was observed after 3 day’s aeration treatment. The high potassium (K) concentration in wastewater suppressed Cs removal, but did not affect Sr removal. Other substrates such as lactic, acetic, and propionic acids were useful for Cs and Sr removal. But, removal efficiencies were lower than about 50%. When the practical outdoor removal experiment carried out using1 m3 vessel, almost 100% of Cs and 51% of Sr were removed like a laboratory experiment after 3 day’s aerobic treatment. After treatment, the SSI immobilized ceramic was recovered easily from water using an electromagnet. This SSI immobilized ceramic seem to remove radioactive Cs and Sr from water environments of Fukushima,Japan.展开更多
Severe fever with thrombocytopenia syndrome(SFTS),a tick-borne infectious disease with high mortality,is diagnosed by the serological testing of serum samples from patients in the acute and convalescent phases and/or ...Severe fever with thrombocytopenia syndrome(SFTS),a tick-borne infectious disease with high mortality,is diagnosed by the serological testing of serum samples from patients in the acute and convalescent phases and/or by direct detection of the SFTS virus(SFTSV).Conventionally,heat and UV treatments have been used to inactivate the viruses present in serum samples before performing the serological assays.Here,we examined the inactivation conditions optimal for SFTSV-containing serum samples to ensure the safety of laboratory workers while maintaining the accuracy of serological assay results simultaneously.Heating human serum samples spiked with SFTSV to 60C for 30 min or exposing them to UV irradiation for 30 min,reduced the infectious virus titer below the limit of detection.SFTSV in sera from patients in the acute phase of SFTS was completely inactivated by heating to 60C for 30 min,followed by UV irradiation for 10 min.This inactivation procedure had minimal impact on the performance of SFTSV antibody detection tests.The data provided herein can serve as a guide for laboratory workers and researchers working with SFTS serological tests.展开更多
文摘This study investigated practical and simultaneous removal of cesium (Cs, initial concentration of 5 mg/L) and strontium (Sr, initial concentration of 5 mg/L) using a photosynthetic bacterium, Rhodobacter sphaeroides SSI, immobilized on recovery-type porous ceramic made from glass waste. When 4 - 8 pieces /L of SSI immobilized ceramic were added to synthetic sewage wastewater containing glucose, almost 100% of Cs and 57% - 61% removal of Sr was observed after 3 day’s aeration treatment. The high potassium (K) concentration in wastewater suppressed Cs removal, but did not affect Sr removal. Other substrates such as lactic, acetic, and propionic acids were useful for Cs and Sr removal. But, removal efficiencies were lower than about 50%. When the practical outdoor removal experiment carried out using1 m3 vessel, almost 100% of Cs and 51% of Sr were removed like a laboratory experiment after 3 day’s aerobic treatment. After treatment, the SSI immobilized ceramic was recovered easily from water using an electromagnet. This SSI immobilized ceramic seem to remove radioactive Cs and Sr from water environments of Fukushima,Japan.
基金This work was supported in part by a grant from the Japan Agency for Medical Research and Development(AMED)(#JP19fk0108070,JP19fk0108081,and JP19fk0108072).
文摘Severe fever with thrombocytopenia syndrome(SFTS),a tick-borne infectious disease with high mortality,is diagnosed by the serological testing of serum samples from patients in the acute and convalescent phases and/or by direct detection of the SFTS virus(SFTSV).Conventionally,heat and UV treatments have been used to inactivate the viruses present in serum samples before performing the serological assays.Here,we examined the inactivation conditions optimal for SFTSV-containing serum samples to ensure the safety of laboratory workers while maintaining the accuracy of serological assay results simultaneously.Heating human serum samples spiked with SFTSV to 60C for 30 min or exposing them to UV irradiation for 30 min,reduced the infectious virus titer below the limit of detection.SFTSV in sera from patients in the acute phase of SFTS was completely inactivated by heating to 60C for 30 min,followed by UV irradiation for 10 min.This inactivation procedure had minimal impact on the performance of SFTSV antibody detection tests.The data provided herein can serve as a guide for laboratory workers and researchers working with SFTS serological tests.
