Photodegradation of mercaptopyridine-N-oxide biocides
Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide d...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Neihof, R. A. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1979 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag New York Inc. 1979 |
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| Übergeordnetes Werk: |
Enthalten in: Archives of environmental contamination and toxicology - Springer-Verlag, 1973, 8(1979), 3 vom: Mai, Seite 355-368 |
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| Übergeordnetes Werk: |
volume:8 ; year:1979 ; number:3 ; month:05 ; pages:355-368 |
| Links: |
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| DOI / URN: |
10.1007/BF01056251 |
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| Katalog-ID: |
OLC2070674673 |
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| 520 | |a Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. | ||
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| 700 | 1 | |a Patouillet, C. |4 aut | |
| 700 | 1 | |a Hannan, P. J. |4 aut | |
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10.1007/BF01056251 doi (DE-627)OLC2070674673 (DE-He213)BF01056251-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Neihof, R. A. verfasserin aut Photodegradation of mercaptopyridine-N-oxide biocides 1979 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1979 Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. Photolysis Biocide Storage Tank Butylamine Photodegradation Rate Bailey, C. A. aut Patouillet, C. aut Hannan, P. J. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 8(1979), 3 vom: Mai, Seite 355-368 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:8 year:1979 number:3 month:05 pages:355-368 https://doi.org/10.1007/BF01056251 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_70 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4313 GBV_ILN_4319 AR 8 1979 3 05 355-368 |
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10.1007/BF01056251 doi (DE-627)OLC2070674673 (DE-He213)BF01056251-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Neihof, R. A. verfasserin aut Photodegradation of mercaptopyridine-N-oxide biocides 1979 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1979 Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. Photolysis Biocide Storage Tank Butylamine Photodegradation Rate Bailey, C. A. aut Patouillet, C. aut Hannan, P. J. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 8(1979), 3 vom: Mai, Seite 355-368 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:8 year:1979 number:3 month:05 pages:355-368 https://doi.org/10.1007/BF01056251 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_70 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4313 GBV_ILN_4319 AR 8 1979 3 05 355-368 |
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10.1007/BF01056251 doi (DE-627)OLC2070674673 (DE-He213)BF01056251-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Neihof, R. A. verfasserin aut Photodegradation of mercaptopyridine-N-oxide biocides 1979 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1979 Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. Photolysis Biocide Storage Tank Butylamine Photodegradation Rate Bailey, C. A. aut Patouillet, C. aut Hannan, P. J. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 8(1979), 3 vom: Mai, Seite 355-368 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:8 year:1979 number:3 month:05 pages:355-368 https://doi.org/10.1007/BF01056251 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_70 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4313 GBV_ILN_4319 AR 8 1979 3 05 355-368 |
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10.1007/BF01056251 doi (DE-627)OLC2070674673 (DE-He213)BF01056251-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Neihof, R. A. verfasserin aut Photodegradation of mercaptopyridine-N-oxide biocides 1979 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1979 Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. Photolysis Biocide Storage Tank Butylamine Photodegradation Rate Bailey, C. A. aut Patouillet, C. aut Hannan, P. J. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 8(1979), 3 vom: Mai, Seite 355-368 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:8 year:1979 number:3 month:05 pages:355-368 https://doi.org/10.1007/BF01056251 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_70 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4313 GBV_ILN_4319 AR 8 1979 3 05 355-368 |
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10.1007/BF01056251 doi (DE-627)OLC2070674673 (DE-He213)BF01056251-p DE-627 ger DE-627 rakwb eng 333.7 610 VZ Neihof, R. A. verfasserin aut Photodegradation of mercaptopyridine-N-oxide biocides 1979 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag New York Inc. 1979 Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. Photolysis Biocide Storage Tank Butylamine Photodegradation Rate Bailey, C. A. aut Patouillet, C. aut Hannan, P. J. aut Enthalten in Archives of environmental contamination and toxicology Springer-Verlag, 1973 8(1979), 3 vom: Mai, Seite 355-368 (DE-627)129397725 (DE-600)185986-9 (DE-576)01478100X 0090-4341 nnns volume:8 year:1979 number:3 month:05 pages:355-368 https://doi.org/10.1007/BF01056251 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW GBV_ILN_11 GBV_ILN_21 GBV_ILN_22 GBV_ILN_70 GBV_ILN_252 GBV_ILN_601 GBV_ILN_2018 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4103 GBV_ILN_4219 GBV_ILN_4313 GBV_ILN_4319 AR 8 1979 3 05 355-368 |
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Enthalten in Archives of environmental contamination and toxicology 8(1979), 3 vom: Mai, Seite 355-368 volume:8 year:1979 number:3 month:05 pages:355-368 |
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photodegradation of mercaptopyridine-n-oxide biocides |
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Photodegradation of mercaptopyridine-N-oxide biocides |
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Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. © Springer-Verlag New York Inc. 1979 |
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Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. © Springer-Verlag New York Inc. 1979 |
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Abstract Mercaptopyridine-N-oxide biocides in dilute aqueous solution underwent rapid reductions in toxicity on exposure to sunlight, according to bioassays with marine algae and bacteria. After 5 to 10 h exposure at 100 ppm of the parent compound, a tertiary butylamine derivative or the disulfide dimer, ten-fold increases in bioassay concentrations were necessary to equal the toxicities of the unirradiated solutions. Ultraviolet spectral measurements indicated that pyridine-N-oxide 2-sulfonic acid was an early photolytic intermediate. This compound and other possible photo-products were much less toxic than the original biocides and were also susceptible to further light-induced degradation and toxicity loss. Another photodegradation pathway led to an insoluble product. Estimates of early photolysis rates from ultraviolet spectral measurements indicated that temperature, pH, and salinity, within normal environmental limits, were not important variables. Wavelengths of 320–355 nm were effective in producing photodegradation, and exposure under 24 cm of seawater had no effect on the photodegradation rate. In the absence of oxygen, toxicity loss rates of sunlight-exposed biocides were less than one-tenth of those in oxygenated water. In aqueous solutions, biocides exposed to air in the dark underwent relatively slow oxidative changes. The mercaptopyridine-N-oxide class of biocides has a potential use in controlling microbial growth in the dark for long periods and then degrading rapidly to non-toxic products when discharged into sunlit natural waters. Prevention of microbial contamination in shipboard fuel storage tanks may be a possible application for these compounds. © Springer-Verlag New York Inc. 1979 |
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