Catalytic ozonation is regarded as a promising technology in the advanced treatment of refractory organic wastewater.Packed-bed reactors are widely used in practical applications due to simple structures,installation ...Catalytic ozonation is regarded as a promising technology in the advanced treatment of refractory organic wastewater.Packed-bed reactors are widely used in practical applications due to simple structures,installation and operation.However,mass transfer of packed-bed reactors is relatively restrained and amplified deviations usually occurred in scale-up application.Herein,a multi-scale packed-bed model of catalytic ozonation was established to guide pilot tests.First,a laboratory-scale test was conducted to obtain kinetic parameters needed for modeling.Then,a multi-scale packed-bed model was developed to research the effects of water distribution structure,catalyst particle size,and hydraulic retention time(HRT)on catalytic ozonation.It was found that the performance of packed bed reactor was increased with evenly distributed water inlet,HRT of 60 min,and catalyst diameter of about 3-7 mm.Last,an optimized reactor was manufactured and a pilot-scale test was conducted to treat kitchen wastewater using catalytic ozonation process.In the pilot-scale test with an ozone dosage of 50 mg/L and HRT of 60 min,the packed-bed reactor filled with catalysts I was able to reduce chemical oxygen demand(COD)from 117 to 59 mg/L.The performance of the catalytic ozonation process in the packed-bed reactor for the advanced treatment of actual kitchen wastewater was investigated via both multi-scale simulation and pilot-scale tests in this study,which provided a practical method for optimizing the reactors of treating refractory organic wastewater.展开更多
Background: Cervical cancer is a highly aggressive cancer that seriously affects the physical and mental health and quality of life of women,especially for women in developing countries. Therefore, cervical cancer has...Background: Cervical cancer is a highly aggressive cancer that seriously affects the physical and mental health and quality of life of women,especially for women in developing countries. Therefore, cervical cancer has always been the focus of research, and in recent years, various studies on cervical cancer have emerged one after another.Methods: Our study aimed to illustrate the development trends in cervical cancer research in China from 2013 to 2022 and compare the findings with studies in other parts of the world during the same period by using bibliometric analysis and the Science Citation Index Expanded. Literature data were analyzed and visualized by using Cite Space and VOSviewer.Results: The results show that the number of articles on cervical cancer has increased in recent years, among which articles on the pathogenesis and epidemiological characteristics of cervical cancer account for the majority. The research in China has developed rapidly in recent years, but there is still a certain gap compared with other developed countries.Conclusion: Bibliometric and visualization analyses offer a unique and objective perspective in the field of cervical cancer and may assist scholars in identifying new research directions.展开更多
基金supported by the“Explorer 100”cluster system of Tsinghua HPC Platform.
文摘Catalytic ozonation is regarded as a promising technology in the advanced treatment of refractory organic wastewater.Packed-bed reactors are widely used in practical applications due to simple structures,installation and operation.However,mass transfer of packed-bed reactors is relatively restrained and amplified deviations usually occurred in scale-up application.Herein,a multi-scale packed-bed model of catalytic ozonation was established to guide pilot tests.First,a laboratory-scale test was conducted to obtain kinetic parameters needed for modeling.Then,a multi-scale packed-bed model was developed to research the effects of water distribution structure,catalyst particle size,and hydraulic retention time(HRT)on catalytic ozonation.It was found that the performance of packed bed reactor was increased with evenly distributed water inlet,HRT of 60 min,and catalyst diameter of about 3-7 mm.Last,an optimized reactor was manufactured and a pilot-scale test was conducted to treat kitchen wastewater using catalytic ozonation process.In the pilot-scale test with an ozone dosage of 50 mg/L and HRT of 60 min,the packed-bed reactor filled with catalysts I was able to reduce chemical oxygen demand(COD)from 117 to 59 mg/L.The performance of the catalytic ozonation process in the packed-bed reactor for the advanced treatment of actual kitchen wastewater was investigated via both multi-scale simulation and pilot-scale tests in this study,which provided a practical method for optimizing the reactors of treating refractory organic wastewater.
文摘Background: Cervical cancer is a highly aggressive cancer that seriously affects the physical and mental health and quality of life of women,especially for women in developing countries. Therefore, cervical cancer has always been the focus of research, and in recent years, various studies on cervical cancer have emerged one after another.Methods: Our study aimed to illustrate the development trends in cervical cancer research in China from 2013 to 2022 and compare the findings with studies in other parts of the world during the same period by using bibliometric analysis and the Science Citation Index Expanded. Literature data were analyzed and visualized by using Cite Space and VOSviewer.Results: The results show that the number of articles on cervical cancer has increased in recent years, among which articles on the pathogenesis and epidemiological characteristics of cervical cancer account for the majority. The research in China has developed rapidly in recent years, but there is still a certain gap compared with other developed countries.Conclusion: Bibliometric and visualization analyses offer a unique and objective perspective in the field of cervical cancer and may assist scholars in identifying new research directions.
