Inactivation effect of pressurized carbon dioxide on bacteriophage Qβ and ΦX174 as a novel disinfectant for water treatment  

作　　者：Huy Thanh Vo Tsuyoshi Imai Truc Thanh Ho Masahiko Sekine Ariyo Kanno Takaya Higuchi Koichi Yamamoto Hidenori Yamamoto 

机构地区：[1]Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai,Yamaguchi 755-8611, Japan [2]Faculty of Urban Engineering, Central University of Construction,Tuy Hoa, Phu Yen, 56000, Vietnam

出　　处：《Journal of Environmental Sciences》2014年第6期1301-1306,共6页环境科学学报（英文版）

基　　金：supported by a cooperation agreement between Yamaguchi University and the Ministry of Education & Training (Vietnam)

摘　　要：The inactivation effects of pressurized CO2 against bacteriophage Qβ and ФX 174 were investigated under the pressure of 0.3-0.9 MPa, initial concentration of 107-109 PFU/mL, and temperature of 17.8℃-27.2℃. The optimum conditions were found to be 0.7 MPa and an exposure time of 25 min. Under identical treatment conditions, a greater than 3.3-log reduction in bacteriophage Qβ was achieved by CO2, while a nearly 3.0 log reduction was observed for phage ФX174. The viricidal effects of N2O （an inactivation gas with similar characteristics to CO2）, normal acid （HC1）, and CO2 treatment with phosphate buffered saline affirmed the chemical nature of CO2 treatment. The pumping cycle, depressurization rate, and release of intracellular substances caused by CO2 were its viricidal mechanisms. The results indicate that CO2 has the potential for use as a disinfectant without forming disinfection by-products.The inactivation effects of pressurized CO2 against bacteriophage Qβ and ФX 174 were investigated under the pressure of 0.3-0.9 MPa, initial concentration of 107-109 PFU/mL, and temperature of 17.8℃-27.2℃. The optimum conditions were found to be 0.7 MPa and an exposure time of 25 min. Under identical treatment conditions, a greater than 3.3-log reduction in bacteriophage Qβ was achieved by CO2, while a nearly 3.0 log reduction was observed for phage ФX174. The viricidal effects of N2O （an inactivation gas with similar characteristics to CO2）, normal acid （HC1）, and CO2 treatment with phosphate buffered saline affirmed the chemical nature of CO2 treatment. The pumping cycle, depressurization rate, and release of intracellular substances caused by CO2 were its viricidal mechanisms. The results indicate that CO2 has the potential for use as a disinfectant without forming disinfection by-products.

关 键 词：bacteriophage Qβ bacteriophage ФX174 pressurized CO2 viricidal effect microbubbles water disinfection 

分 类 号：X703[环境科学与工程—环境工程]