The occurrence of fluorosis in Gaomi City is among the highest regions in China.High fluoride groundwater occurrence in Quaternary sediments originated from the weathering residuals of Cretaceous volcano clastic rock....The occurrence of fluorosis in Gaomi City is among the highest regions in China.High fluoride groundwater occurrence in Quaternary sediments originated from the weathering residuals of Cretaceous volcano clastic rock. The origin of high fluoride groundwater in Gaomi City was summarized as the following 2 model: one is leaching and enrichment, the other one is evaporation and condensation in alkali condition. Based on the analysis of the local environment and the mechanism of fluoride enrichment,a method of “insitu dispelling' was proposed and confirmed through laboratory leaching test. This might be economical and feasible method for the removal of fluorine from the local strata.展开更多
An atmospheric cold plasma brush suitable for large area and low-temperature plasma-based sterilization is designed and used to treat enterococcus faecalis bacteria.The results show that the efficiency of the inactiva...An atmospheric cold plasma brush suitable for large area and low-temperature plasma-based sterilization is designed and used to treat enterococcus faecalis bacteria.The results show that the efficiency of the inactivation process by helium plasma is dependent on applied power and exposure time.After plasma treatments,the cell structure and morphology changes can be observed by scanning electron microscopy.Optical emission measurements indicate that reactive species such as O and OH play a significant role in the sterilization process.展开更多
文摘The occurrence of fluorosis in Gaomi City is among the highest regions in China.High fluoride groundwater occurrence in Quaternary sediments originated from the weathering residuals of Cretaceous volcano clastic rock. The origin of high fluoride groundwater in Gaomi City was summarized as the following 2 model: one is leaching and enrichment, the other one is evaporation and condensation in alkali condition. Based on the analysis of the local environment and the mechanism of fluoride enrichment,a method of “insitu dispelling' was proposed and confirmed through laboratory leaching test. This might be economical and feasible method for the removal of fluorine from the local strata.
基金Supported by the Young Scientists Fund of the National Natural Science Foundation of China under Grant No 11005151.
文摘An atmospheric cold plasma brush suitable for large area and low-temperature plasma-based sterilization is designed and used to treat enterococcus faecalis bacteria.The results show that the efficiency of the inactivation process by helium plasma is dependent on applied power and exposure time.After plasma treatments,the cell structure and morphology changes can be observed by scanning electron microscopy.Optical emission measurements indicate that reactive species such as O and OH play a significant role in the sterilization process.