Degradation of the tri-n-butyltin species in water

Maguire, R. James; Carey, John H.; Hale, Elizabeth J.

doi:10.1021/jf00119a035

Cited by 161 publications

(55 citation statements)

References 11 publications

(14 reference statements)

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“…The biodegradation of organotin compounds, such as degradation by bacteria (Harinoa et al, 1997;Inoue et al, 2000), has been studied in detail. The abiotic degradation mainly includes the gamma irradiation (Allen et al, 1987) and photolysis (Maguire et al, 1983;Blunden, 1983;Mailhot et al, 1999). Some investigations have been conducted to study the process of photodegradation of organotin compounds because photolysis is an important process for organotin compounds in the environment.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions

Zhai

Liu

et al. 2008

Chemosphere

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The photodegradation of methyltins, as environmental pollutants, has scarcely been studied so far because of the shortage of rapid and sensitive speciation methods, even though they have very simple structures. The photodegradation of monomethyltin trichloride (MMT), dimethyltin dichloride (DMT) and trimethyltin chloride (TMT) was studied with our new developed HPLC-FPD hyphenated system, which enables rapid and sensitive detection of methyltins. The half-life times and kinetic rate constants of their degradation at different pH were calculated. The results suggest that MMT, DMT and TMT can be degraded under the UV irradiation rapidly at different pH, with a degradation rate sequence of TMT < DMT < MMT. An unknown intermediary product, which is more stable and has higher concentration at pH 8 for MMT and DMT, of methyltin photodegradation was detected for the first time. This unknown intermediary product was identified as methyloltin with electrospray mass spectrometry, and the possible mechanism was proposed based on the intermediary product. The effects of some environmental parameters such as salinity and humic acid on the degradation rate of methyltins were also investigated. Results suggest that salinity and humic acid have strong effect on their degradation, especially for TMT, which was almost never degraded in the solutions containing NaCl and humic acid.

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Section: Introductionmentioning

confidence: 99%

Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions

Zhai

Liu

et al. 2008

Chemosphere

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“…Since all the oyster taken in summer in this study were wild and those in other seasons were farmed, the seasonal change in oyster may be related to the fact whether it is wild or farmed. Otherwise, as organotin compounds have strong affinity for lipids (Maguire et al 1983;Tsuda et al 1986), the seasonal changes of organotin compounds may be due to the seasonal changes of lipids concentrations in edible portions in fish and shellfish. The reason for the seasonal change seems to be different from one species to another.…”

Section: Discussionmentioning

confidence: 99%

“…It has been studied that triorganotin compounds are metabolized in the microsomal monooxygenase system into diorganotin, monoorganotin compounds and inorganic tin (Kimmel et al 1977). They are also degraded in an aquatic environment (Soderquist and Crosby 1980;Maguire et al 1983). It will be therefore worthwhile to investigate the correlations among organotin compounds.…”

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confidence: 99%

Simultaneous Determination of Organotin Compounds in Fish and Shellfish by Gas Chromatography with a Flame Photometric Detector.

Tsunoda

1993

Tohoku J. Exp. Med.

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In the present study the levels of the organotin compounds were determined in fish and shellfish which were purchased from retail markets in Niigata, Japan. The concentrations of dibutyltin (DBT), tributyltin (TBT), diphenyltin (DPT) and triphenyltin (TPT) compounds were separately determined by FPD-gas chromatography. Eight species (yellowtail, tuna, cuttlefish, olive flounder, northern shrimp, cinnamon flounder, Japanese sea bass and oyster) were studied and five samples of each species were analyzed in each season, which meant 40 samples in one season, and 160 in total. Among the compounds of interest, DBT, TBT and TPT were detected. The highest concentrations detected were 0.674,ug/g for DBT, 0.669,ug/g for TBT and 0.186 1ug/g for TPT. DBT was detected as much as TBT, however, its concentration was not correlated with that of TBT. Seasonal changes of the mean value of the concentration of DBT and TBT were observed. In some species, such as yellowtail and Japanese sea bass, combined contaminations of these organotin compounds were also evident. This study is the first step to elucidate possible health hazards by environmental pollution of organotin compounds on human beings.

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“…La dégradation des tributyl et triméthylé-tains en milieu aqueux est cependant plus rapide que celle des dérivés disubstitués et les mécanismes réac-tionnels sont encore mal connus. La demi-vie du TBT dans l'eau varie en fonction des conditions de milieu, de pH, de température, de turbidité et d'éclairement (5). La dégradation est plus rapide dans les eaux de mer chargées de matières en suspension.…”

Section: Etain Organiqueunclassified

L'étain et les organoétains dans l'environnement

Anger¹

2001

Ann Toxicol Anal.

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RÉSUMÉL'étain sous forme minérale ou organique connaît de nombreuses applications industrielles. Sa présence dans l'environnement est essentiellement d'origine anthropogénique. Toutes les formes minérales et organiques de l'étain y sont présentes aussi bien les produits issus de la biodégradation des organoétains que ceux résultant de la biométhylation de l'étain minéral. Si les sels minéraux de l'étain sont considé-rés comme peu toxiques pour les mammifères, il n 'en est pas de même pour les composés organiques qui interfèrent avec de nombreux mécanismes biochimiques intracellulaires. L'écotoxicologie de l'étain et des organoétains est une pré-occupation relativement récente liée essentiellement à la dispersion des dérivés trialkylés et triarylés dans Venvironnement aquatique par suite de leur utilisation dans les peintures marines « antisalissures » ou en agriculture. Ces composés, fortement lipophiles, sont susceptibles de s'accumuler dans les chaînes alimentaires. L'examen des données disponibles pour les animaux aquatiques montre des effets significatifs sur la croissance et la reproduction des organismes phyto et zooplanctoniques pour des concentrations dans l'eau inférieures au pg/l. Il ne semble pourtant pas qu'il y ait actuellement des risques particuliers pour la santé humaine par le biais de l'ingestion de crustacés ou de poissons contaminés. Des dispositions législatives ont été prises interdisant notamment l'utilisation des peintures marines antisalissures pour les bateaux de longueur inférieure à 25 mètres. Elles impliquent donc une surveillance analytique basée sur la spéciation de l'étain après extraction du milieu, dérivation et concentration, grâce aux méthodes chromatographiques séparatives couplées aux systèmes de détection modernes (spectrométrie de masse, émission atomique). SUMMARYTin in the mineral or organic form knows many industrial applications. Its presence in the environment is essentially of anthropogenic origin. All forms of mineral and organic tin are present as well stemming products of the organotin biodegradation as those resulting from the biométhylation of mineral tin. If mineral salts of tin are considered as poorly toxic for mammals, it is not the same for organic compounds that interfere with many biochemical intracellular mechanisms. Tin and organotin ecotoxicology is a relatively recent preoccupation linked essentially to the dispersion of the trialkyl and triaryl derivatives in the aquatic environment as a result of their utilization in marine antifouling paints or in agriculture. These strongly lipophilic compounds are susceptible to accumulate in food chains. Available data for aquatic animals show significant effects on the growth and the reproduction of phyto and zooplanktonic organisms, for water levels less than 1 pg/1. Nevertheless it does not seem that there are currently particular risks for the human health when ingesting crustaceans or contaminated fish. Legislative dispositions have been taken forbiding notably antifouling paints for inferior length boats t...

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Degradation of the tri-n-butyltin species in water

Cited by 161 publications

References 11 publications

Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions

Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions

Simultaneous Determination of Organotin Compounds in Fish and Shellfish by Gas Chromatography with a Flame Photometric Detector.

L'étain et les organoétains dans l'environnement

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