Bactericidal activities of tri- and penta-iodinated resins against Legionella pneumophila
| Autor: | G. N. Sanden, B. S. Fields, W. E. Morrill, J.C. Feeley, J. M. Barbaree |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Chromatography biology Chemistry Elution Ecological Modeling Disinfectant chemistry.chemical_element Iodine biology.organism_classification Total dissolved solids Pollution Amperometric titration Legionella pneumophila Environmental chemistry Organic matter Waste Management and Disposal Bacteria Water Science and Technology Civil and Structural Engineering |
| Zdroj: | Water Research. 26:365-370 |
| ISSN: | 0043-1354 |
| Popis: | Quaternary-ammonium-anion-exchange resins binding tri-iodides or penta-iodides were tested for their ability to disinfect water containing Legionella pneumophila . Results indicate that the iodinated resins are stable demand-release disinfectants. No residual iodine was detected by amperometric titration in the eluate from tri-iodinated or washed penta-iodinated resins. When an aqueous suspension containing 2.7 × 10 9 cfu of L. pneumophila per ml was passed through tri-iodinated resins, less than 0.004% were recovered. No viable cells were detected by direct plating from a suspension of 2.3 x 10 9 cfu per ml eluted through penta-iodinated resins (>99.99999% viability reduction). This disinfectant was less effective if legionellae were ingested by Tetrahymena pyriformis before exposure. Penta-iodinated resins were also less active at 4°C, when tested with water designed to inhibit halogen disinfectants and waters containing high concentrations of organic matter or total dissolved solids. Further study of penta-iodinated resins as a disinfectant of potable water containing L. pneumophila is warranted. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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