Complete removal of the characteristic septic/swampy odor from Huangpu River source water could only be achieved under an ozone dose as high as 4.0 mg/L in an ozone-biological activated carbon （O3- BAC） process, whi...Complete removal of the characteristic septic/swampy odor from Huangpu River source water could only be achieved under an ozone dose as high as 4.0 mg/L in an ozone-biological activated carbon （O3- BAC） process, which would lead to the production of high concentrations of carcinogenic bromate due to the high bromide content. This study investigated the possibility of simultaneous control of bromate and the septic/swampy odor by adding H2O2 prior to the O3-BAC process for the treatment of Huangpu River water. H2O2 addition could reduce the bromate concentration effectively at an H2O2/O3 （g/g） ratio of 0.5 or higher. At the same time, the septic/swampy odor removal was enhanced by the addition of H2O2, although optimization of the H2O2/O3 ratio was required for each ozone dose. At an ozone dose of 2.0 mg/L, the odor was removed completely at an H2O2/O3 ratio of 0.5. The results indicated that H2O2 application at a suitable dose could enhance the removal of the septic/swampy odor while suppressing the formation of bromate during ozonation of Huangpu River source water.展开更多
The relevance of the study is forensic expert activity in terms of forensic examinations have been so transformed that existing theoretical provisions do not already solve traditional problems in some fields;their sol...The relevance of the study is forensic expert activity in terms of forensic examinations have been so transformed that existing theoretical provisions do not already solve traditional problems in some fields;their solvation requires new approaches of both theoretical and practical nature.In this regard,the purpose of this study is to analyze the content of new innovative directions in forensic examinations,including criminalistic ones,and the possibility of their effective application in forensic expert activity.The methodological basis of the study is the dialectical method of scientific knowledge,which allowed the authors to consider the theoretical and scientific,and practical foundations of modem trends in forensic examinations,including criminalistic ones.It also helped to identify promising fields of examinations necessary for crime prevention.Therefore,authors singled out the following advanced fields:biometric and computer forensic analyses,polygraph,and odor and trace evidence analyses.The materials of the article are of practical value for forensic experts and criminologists,law enforcement agencies.展开更多
基金supported by the National Natural Science Foundation of China(No.50938007)the Funds for Major Science and Technology Program for Water Pollution Control and Treatment(No.2012ZX07403-002-02)the Shanghai Committee of Science and Technology Project(No.11XD1420500)
文摘Complete removal of the characteristic septic/swampy odor from Huangpu River source water could only be achieved under an ozone dose as high as 4.0 mg/L in an ozone-biological activated carbon （O3- BAC） process, which would lead to the production of high concentrations of carcinogenic bromate due to the high bromide content. This study investigated the possibility of simultaneous control of bromate and the septic/swampy odor by adding H2O2 prior to the O3-BAC process for the treatment of Huangpu River water. H2O2 addition could reduce the bromate concentration effectively at an H2O2/O3 （g/g） ratio of 0.5 or higher. At the same time, the septic/swampy odor removal was enhanced by the addition of H2O2, although optimization of the H2O2/O3 ratio was required for each ozone dose. At an ozone dose of 2.0 mg/L, the odor was removed completely at an H2O2/O3 ratio of 0.5. The results indicated that H2O2 application at a suitable dose could enhance the removal of the septic/swampy odor while suppressing the formation of bromate during ozonation of Huangpu River source water.
文摘The relevance of the study is forensic expert activity in terms of forensic examinations have been so transformed that existing theoretical provisions do not already solve traditional problems in some fields;their solvation requires new approaches of both theoretical and practical nature.In this regard,the purpose of this study is to analyze the content of new innovative directions in forensic examinations,including criminalistic ones,and the possibility of their effective application in forensic expert activity.The methodological basis of the study is the dialectical method of scientific knowledge,which allowed the authors to consider the theoretical and scientific,and practical foundations of modem trends in forensic examinations,including criminalistic ones.It also helped to identify promising fields of examinations necessary for crime prevention.Therefore,authors singled out the following advanced fields:biometric and computer forensic analyses,polygraph,and odor and trace evidence analyses.The materials of the article are of practical value for forensic experts and criminologists,law enforcement agencies.
