Suchergebnisse

The decree enacted in 1982 prohibiting the use of tributyltin (TBT) in anti-fouling paints for vessels less than 25 metres in length and submerged structures has not completely removed from the marine environment this biocidal product which is a high risk to biotope. It is permanently fixed to tanks and sediments and is likely to be released into water during civil engineering works, such as dredging. The results of an analytical study carried out during the dredging of the port of Audenge show that the technique used, based on oxidation and exposure to light of the sludge by means of a series of settling ponds, allows effective decontamination of the discharges. ; International audience The legislation introduced in 1982, prohibiting the use of tributyltin (TBT)-containing paints on vessels under 25 meters lengths, did not totally eliminate this biocide, toxic to aquatic life, in marine environment. TBT, preferably absorbed on finest particles in mud and sediments, is a potential source of contamination during civil engineering works such as dredgings. The results of an analytical study, realised during the dredging of the port of Audenge, has pointed out that the sludge treatment process, including both air oxidation and light exposure, minimizes organotin contents of the water effluent. ; The decree enacted in 1982 prohibiting the use of tributyltin (TBT) in anti-fouling paints for vessels less than 25 metres in length and submerged structures has not completely removed from the marine environment this biocidal product which is a high risk to biotope. It is permanently fixed to tanks and sediments and is likely to be released into water during civil engineering works, such as dredging. The results of an analytical study carried out during the dredging of the port of Audenge show that the technique used, based on oxidation and exposure to light of the sludge by means of a series of settling ponds, allows effective decontamination of the discharges. ; L'arrêté promulgué en 1982 interdisant l'utilisation du ...

International audience ; The legislation introduced in 1982, prohibiting the use of tributyltin (TBT)-containing paints on vessels under 25 meters lengths, did not totally eliminate this biocide, toxic to aquatic life, in marine environment. TBT, preferably absorbed on finest particles in mud and sediments, is a potential source of contamination during civil engineering works such as dredgings. The results of an analytical study, realised during the dredging of the port of Audenge, has pointed out that the sludge treatment process, including both air oxidation and light exposure, minimizes organotin contents of the water effluent. ; L'arrêté promulgué en 1982 interdisant l'utilisation du tributylétain (TBT) dans les peintures antisalissures pour les bateaux de moins de 25 mètres et les structures immergées n'a pas fait totalement disparaître du milieu marin ce biocide à haut risque pour le biotope. Durablement fixé aux vases et aux sédiments, il est susceptible d'être libéré dans l'eau au cours de travaux de génie civil, tels que les dragages. Les résultats d'une étude analytique effectuée au cours du dragage du port d'Audenge montrent que la technique employée, basée sur une oxydation et une exposition à la lumière des boues au moyen d'une série de bassins de décantation, permet de réaliser une décontamination efficace des rejets.