Portal de Periódicos da CAPES

Antifouling biocides contamination in sediment of coastal waters from Japan

2010; University of Tokyo; Volume: 34; Issue: 1 Linguagem: Inglês

1349-3000

Hiroya Harino, Sayaka Eguchi, Takaomi Arai, Madoka Ohji, Yoshikazu Yamamoto, Nobuyuki Miyazaki,

Marine Ecology and Invasive Species

The contaminations by antifouling biocide in sediment from four coastal waters (the Port of Osaka, Maizuru Bay, Otsuchi Bay and Tanabe Bay) were surveyed. Highest concentrations of tributyiltin (TBT) and triphenyltin (TPT) were found in Tanabe Bay. Furthermore, the higher percentages of TBT for total butyltin (BT) and TPT for total phenyltin (PT) in this area were also observed in this bay, suggesting that a lot of organotin (OT) compound has been used for a long time. The concentrations of Sea Nine 211, Dichlofluanid, and M1 in four coastal waters of Japan were in the range of 0.10-12 m gk g 1 dw, 0.76-120 m gk g 1 dw, 0.1-1.0 m gk g 1 dw, � 0.08-4.7 m gk g 1 dw and � 0.18-1.3 m gk g 1 dw, respectively. To find the characteristic of alternative biocides in four coastal waters, the ratios of Diuron for Irgarol 1051 were calculated. The ratio of Diuron was high in the Port of Osaka (international trading Port) and the ratio of Diuron was low in Maizuru Bay and Otsuchi Bay (fishing Ports). Assessment of alternative biocides depended on their application in respective study area. Most alternative biocides cannot inhibit aquatic animals because most alternative biocides are chemical substances used as herbicides. To resolve this issue, alternative biocides containing copper oxide are found effective for animals. The contamination by copper was therefore surveyed in Otsuchi Bay and Maizuru Bay. Higher concentration of copper around shipyard in Otsuchi Bay suggests the copper contamination by antifouling paints.