期刊名称：EQA - International Journal of Environmental Quality
印刷版ISSN：2281-4485
出版年度：2010
卷号：3
期号：3
页码：33-40
DOI：10.6092/issn.2281-4485/3789
语种：English
出版社：Alma Mater Studiorum - University of Bologna
摘要：Previous research on mercury (Hg) showed strong contamination of the Piallassa Baiona (P.B.) lagoon, near Ravenna. The lagoon received between 100 and 200 tons of Hg generated by an acetaldehyde factory in 1957-1977. In this study, the Hg cycling at the sediment-water interface in the P.B. lagoon was investigated by means of an in situ benthic chamber. The 8-h integrated flux of the methylated form was extremely low and estimated to be only 7% of the result obtained for a summer experiment performed in a similar Hg-contaminated environment (Grado lagoon). Conversely, the in situ flux of Hg accounted for a comparable amount to that observed in the Grado lagoon, although Hg contents in its sediments are almost 50% lower than in P.B. lagoon. Hg mobilization and sequestration in the system, limiting its bioavailability despite the high contents of metal buried in the bottom sediments, seem related to extremely anoxic conditions.
其他摘要：Previous research on mercury (Hg) showed strong contamination of the Piallassa Baiona (P.B.) lagoon, near Ravenna. The lagoon received between 100 and 200 tons of Hg generated by an acetaldehyde factory in 1957-1977. In this study, the Hg cycling at the sediment-water interface in the P.B. lagoon was investigated by means of an in situ benthic chamber. The 8-h integrated flux of the methylated form was extremely low and estimated to be only 7% of the result obtained for a summer experiment performed in a similar Hg-contaminated environment (Grado lagoon). Conversely, the in situ flux of Hg accounted for a comparable amount to that observed in the Grado lagoon, although Hg contents in its sediments are almost 50% lower than in P.B. lagoon. Hg mobilization and sequestration in the system, limiting its bioavailability despite the high contents of metal buried in the bottom sediments, seem related to extremely anoxic conditions.
