Effects of peracetic acid and monochloramine on the inactivation of Naegleria lovaniensis
Biocidal activities of monochloramine and peracetic acid were studied on cysts of Naegleria lovaniensis. Until recently the most commonly used biocide to disinfect cooling water systems was hypochlorite. Owing to its negative impact on the aquatic environment, ecologically less harmful alternatives...
| Veröffentlicht in: | Water science and technology : a journal of the International Association on Water Pollution Research. - 1986. - 47(2003), 3 vom: 21., Seite 167-71 |
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| Weitere Verfasser: | , , , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2003
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| Zugriff auf das übergeordnete Werk: | Water science and technology : a journal of the International Association on Water Pollution Research |
| Schlagworte: | Journal Article Chloramines Disinfectants Peracetic Acid I6KPI2E1HD chloramine KW8K411A1P |
| Zusammenfassung: | Biocidal activities of monochloramine and peracetic acid were studied on cysts of Naegleria lovaniensis. Until recently the most commonly used biocide to disinfect cooling water systems was hypochlorite. Owing to its negative impact on the aquatic environment, ecologically less harmful alternatives have been sought. As the biocidal activity of monochloramine and peracetic acid makes them good candidates for inactivation of pathogenic Naegleria species, these biocides were tested against Naegleria lovaniensis, a relative of the pathogen Naegleria fowleri, as an alternative treatment to hypochlorite. Under laboratory conditions the biocidal activity of hypochlorite was 8- 10x stronger than that of the two investigated substances. Hypochlorite, at a concentration of 0.5 mg/L, killed 100% Naegleria lovaniensis after 1 h exposure (25 degrees C, pH 7.3- 7.4). To achieve similar results with monochloramine and peracetic acid, 3.94 mg/L or 5.33 mg/L had to be used respectively (25 degrees C, pH 8). It was known that the in situ biota of the biofilm, along with any organic material in the water column, had a negative impact on the efficiency of the biocides. There are, however, indications that the relative efficacy of monochloramine and peracetic acid was quite good under such conditions when compared with hypochlorite |
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| Beschreibung: | Date Completed 28.05.2003 Date Revised 24.11.2016 published: Print Citation Status MEDLINE |
| ISSN: | 0273-1223 |