Development of Chitosan Membranes Containing Photosensitizer for Water Disinfection

Authors

  • Janice Rodrigues Perussi

Keywords:

chitosan; membrane; photosensitizer; disinfection

Abstract

Chitosan membranes with a photosensitizer incorporated were developed for the photoinactivation of bacteria in drinking water. The photosensitizers incorporated into chitosan membranes were methylene blue, rose Bengal and two porphyrins: 5,10,15,20-tetrakis(p-aminophenyl)- porphyrin (p-TAPP) and meso-tetrakis(4-N-metylpyridyl)- porphyrin (TMPyP). Evaluation of photoactivity against Escherichia coli suspensions (1ױ07 cells mL-1) showed that both porphyrins had a considerable bactericidal effect under irradiation at 590 nm (2 log reduction in 120 min for p-TAPP and 4 log reduction in 140 min for TMPyP) or 452 nm (2 log reduction for p-TAPP and 4 log reduction for TMPyP in 120 min). Therefore photoinactivation was most effective for TMPyP when blue light was used, leading to a greater reduction in cell count in a shorter period. These results suggest that photoinactivation is effective with either porphyrin incorporated in a polymeric support and that this system has potential to eliminate microbial contaminants in water.

How to Cite

Janice Rodrigues Perussi. (2017). Development of Chitosan Membranes Containing Photosensitizer for Water Disinfection. Global Journal of Science Frontier Research, 17(C2), 5–12. Retrieved from https://journalofscience.org/index.php/GJSFR/article/view/1981

Development of Chitosan Membranes Containing Photosensitizer for Water Disinfection

Published

2017-05-15