Photodynamic Action against Wastewater Microorganisms and Chemical Pollutants: An Effective Approach with Low Environmental Impact

摘要: Wastewater (WW) from urban and industrial activities is often contaminated with microorganisms chemical pollutants. To reduce the concentration of in WW to levels comparable those found natural waters, sewage effluent usually subjected disinfection chlorine, ozone, or ultraviolet light, which may lead formation toxic products contribute selection resistant genes. Moreover, changing patterns infectious diseases emerging multidrug microbial strains entail development new technologies for decontamination. Microbial photodynamic inactivation (PDI) photosensitizers, oxygen, visible light has demonstrated be effective via photogeneration reactive oxygen species able induce damage at external structures level. The promising results PDI suggest that this principle can applied treatment inactivate but also photodegrade aim study was assess applicability decontamination secondarily treated WW. evaluate efficiency bacterial WW, experiments were done both phosphate buffer saline (PBS) filtered bioluminescent Escherichia coli, using small large volumes potential native bacteria (E. coli Enterococcus) present tested assays without adding performed. It if same protocol phototransformation phenol. cationic porphyrin 5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin tetra-iodide (Tetra-Py+-Me) shown against groups representing Gram-negative Gram-positive used as microbiological parameters instigate water quality even showing power photooxidate organic compounds. As photosensitizer when immobilized on solid matrixes easily removed, recovered, reused, an effective, less-expensive, easy-applicable, environmentally friendly technology treat inactivating degrading contaminants time.