作者: Takashi Tomiyasu , Ayako Nagano , Norinobu Yonehara , Hayao Sakamoto , Rifardi
DOI: 10.1016/S0048-9697(00)00502-7
关键词: MERCURE 、 Contamination 、 Effluent 、 Environmental science 、 Bay 、 Minamata disease 、 Hydrology 、 Mercury (element) 、 Pollution 、 Geologic Sediments
摘要: Mercury-contaminated effluent was discharged into Minamata Bay from a chemical plant over 20-year period until 1965 (from 1958 to 1959, River), causing disease. In an effort characterize the extent of contamination in Yatsushiro Sea, vertical and horizontal distributions mercury sediment were investigated. Sediment sampled at 62 locations southern part sea 4 6 March 1996. lower layers long cores sediment, total amount relatively uniform low concentration. We interpret these values represent background concentration absent anthropogenic influence. The value thus estimated for Sea 0.059 +/- 0.013 mg kg(-1) (mean S.D., n = 51). highest each sample ranged 0.086 3.46 (mean, 0.57 kg(-1)). higher obtained stations near River (the sources pollution). Concentrations decreased with distance source. An inspection profiles suggested that deposited had not been fixed but transported, despite 30 years having past since last discharge contaminated effluent. At nine stations, extractable inorganic organic concentrations determined differentially. Inorganic is predominant species comprising approximately 1% total.