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	An Environmentally Friendly Method for Testing Photocatalytic Inactivation of Cyanobacterial Propagation on a Hybrid Ag-TiO2 Photocatalyst under Solar Illumination
	Chang, Shu-Yu ; Huang, Winn-Jung ; Lu, Ben-Ren ; Fang, Guor-Cheng ; Chen, Yeah ; Chen, Hsiu-Lin ; Chang, Ming-Chin ; Hsu, Cheng-Feng
	2015
关键词	photocatalysis silver titanium dioxide cyanobacteria extracellular polymeric substances disinfection by-products ALGAL GROWTH-INHIBITION TITANIUM-DIOXIDE CRYPTOSPORIDIUM-PARVUM TIO2 PHOTOCATALYSIS ESCHERISCHIA-COLI WATER DISINFECTION LIGHT AG MICROORGANISMS
英文摘要	Cyanobacteria were inactivated under sunlight using mixed phase silver (Ag) and deposited titanium dioxide (TiO2) coated on the surface of diatomite (DM) as a hybrid photocatalyst (Ag-TiO2/DM). The endpoints of dose-response experiments were chlorophyll a, photosynthetic efficiency, and flow cytometry measurements. In vitro experiments revealed that axenic cultures of planktonic cyanobacteria lost their photosynthetic activity following photocatalyzed exposure to sunlight for more than 24 h. Nearly 92% of Microcystis aeruginosa cells lost their photosynthetic activity, and their cell morphology was severely damaged within 24 h of the reaction. Preliminary carbon-14 ((CO3-2)-C-14) results suggest that the complete inactivation of cyanobacteria arises from damage to cell wall components (peroxidation). A small concomitant increase in cell wall disorder and a consequent decrease in cell wall functional groups increase the cell wall fluidity prior to cell lysis. A high dosage of Ag-TiO2/DM during photocatalysis increased the concentration of extracellular polymeric substances (EPSs) in the Microcystis aeruginosa suspension by up to approximately 260%. However, photocatalytic treatment had a small effect on the disinfection by-product (DBP) precursor, as revealed by only a slight increase in the formation of trihalomethanes (THMs) and haloacetic acids (HAAs).; Ministry of Science and Technology, Taiwan [MOST 103-2221-E-241-003-MY2]; CPCI-S(ISTP); CPCI-SSH(ISSHP); 12; 15819-15833; 12
语种	英语
出处	Scientific Symposium Small Solution for Big Water-Related Problems Innovative Microarrays and Small Sensors to Cope with Water Quality and Food Security
DOI标识	10.3390/ijerph121215023
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/460238]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Chang, Shu-Yu,Huang, Winn-Jung,Lu, Ben-Ren,et al. An Environmentally Friendly Method for Testing Photocatalytic Inactivation of Cyanobacterial Propagation on a Hybrid Ag-TiO2 Photocatalyst under Solar Illumination. 2015-01-01.

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