Due to the rapid development of China's economy and the rapid progress of science and technology in recent years, especially in China's industrial field, the level of environmental protection production techno...Due to the rapid development of China's economy and the rapid progress of science and technology in recent years, especially in China's industrial field, the level of environmental protection production technology and operation process determines and affects the quality of China's future production and living environment. In actual production and operation, due to the strict requirements of various production processes and technologies, a large amount of polluted industrial wastewater may be formed, which is difficult to be completely oxidized and degraded. In addition, there are also some persistent organic heavy metal pollutants with high industrial concentration, which makes our environmental protection work more difficult and has also attracted great attention from the leaders of relevant technicians. As the long-term chemical and biological treatment of organic wastewater in the past inevitably brings many environmental restrictions, how to effectively, properly, timely and efficiently treat these industrial wastewater to meet the objective needs of environmental discharge and water quality management has become the most important technical work in our country. Therefore, there is an urgent need for an environment-friendly sewage treatment method with good pollutant treatment effect and relatively large pollution cost saving and investment. Studies by relevant departments abroad have found that the catalytic biological oxidation degradation method can indeed achieve environmental protection, which is a key work objective. The mechanism mainly lies in improving the biocatalytic decomposition effect of the catalyst itself and enhancing the reduction rate of the bio-oxidation degradation reaction products. In order to effectively treat various volatile organic polymer pollutants with high concentration and difficult natural degradation and utilization, it can be combined with various wastewater and sludge treatment processes used in the past in China, such as biocatalytic treatment, chemical sludge flocculation precipitation, and then directly applied to the resource treatment project of organic wastewater pollutants, enabling China to better treat various industrial wastewater.展开更多
The Fe203-CeO2-Bi203/-A1203 catalyst, a novel environmental-friendly material, was used to investigate the catalytic wet air oxidation （CWAO） of cationic red GTL under mild operating conditions in a batch reactor. T...The Fe203-CeO2-Bi203/-A1203 catalyst, a novel environmental-friendly material, was used to investigate the catalytic wet air oxidation （CWAO） of cationic red GTL under mild operating conditions in a batch reactor. The catalyst was prepared by wet impregnation, and characterized by special surface area （BET measurement）, X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. The Fe203-CeO2-]]i203/qt-A1203 catalyst exhibited good catalytic activity and stability in the CWAO under atmosphere pressure. The effect of the reaction conditions （catalyst loading, degradation temperature, solution concentration and initial solution pH value） was studied. The result showed that the decolorization efficiency of cationic red GTL was improved with increasing the initial solution pH value and the degradation temperature. The apparent activation energy for the reaction was 79 kJ. mo1-1. Hydroperoxy radicals （HO2.） and superoxide radicals （O2-） appeared as the main reactive species upon the CWAO of cationic red GTL.展开更多
文摘Due to the rapid development of China's economy and the rapid progress of science and technology in recent years, especially in China's industrial field, the level of environmental protection production technology and operation process determines and affects the quality of China's future production and living environment. In actual production and operation, due to the strict requirements of various production processes and technologies, a large amount of polluted industrial wastewater may be formed, which is difficult to be completely oxidized and degraded. In addition, there are also some persistent organic heavy metal pollutants with high industrial concentration, which makes our environmental protection work more difficult and has also attracted great attention from the leaders of relevant technicians. As the long-term chemical and biological treatment of organic wastewater in the past inevitably brings many environmental restrictions, how to effectively, properly, timely and efficiently treat these industrial wastewater to meet the objective needs of environmental discharge and water quality management has become the most important technical work in our country. Therefore, there is an urgent need for an environment-friendly sewage treatment method with good pollutant treatment effect and relatively large pollution cost saving and investment. Studies by relevant departments abroad have found that the catalytic biological oxidation degradation method can indeed achieve environmental protection, which is a key work objective. The mechanism mainly lies in improving the biocatalytic decomposition effect of the catalyst itself and enhancing the reduction rate of the bio-oxidation degradation reaction products. In order to effectively treat various volatile organic polymer pollutants with high concentration and difficult natural degradation and utilization, it can be combined with various wastewater and sludge treatment processes used in the past in China, such as biocatalytic treatment, chemical sludge flocculation precipitation, and then directly applied to the resource treatment project of organic wastewater pollutants, enabling China to better treat various industrial wastewater.
文摘The Fe203-CeO2-Bi203/-A1203 catalyst, a novel environmental-friendly material, was used to investigate the catalytic wet air oxidation （CWAO） of cationic red GTL under mild operating conditions in a batch reactor. The catalyst was prepared by wet impregnation, and characterized by special surface area （BET measurement）, X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. The Fe203-CeO2-]]i203/qt-A1203 catalyst exhibited good catalytic activity and stability in the CWAO under atmosphere pressure. The effect of the reaction conditions （catalyst loading, degradation temperature, solution concentration and initial solution pH value） was studied. The result showed that the decolorization efficiency of cationic red GTL was improved with increasing the initial solution pH value and the degradation temperature. The apparent activation energy for the reaction was 79 kJ. mo1-1. Hydroperoxy radicals （HO2.） and superoxide radicals （O2-） appeared as the main reactive species upon the CWAO of cationic red GTL.
