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首页> 外文期刊>Journal of great lakes research >Mercury Concentrations in Water, Sediment, and Biota from Lake Victoria, East Africa
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Mercury Concentrations in Water, Sediment, and Biota from Lake Victoria, East Africa

机译：东非维多利亚湖中水，沉积物和生物区中的汞含量

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Lake Victoria, East Africa, is the site of the world's most productive freshwater fishery. Mercury in muscle tissue of the 2+ and 3+ year old Nile perch (Lates niloticus), presently the largest constituent of the fishery, was 90 to 250 ng /g wet weight. This is similar to the range of mercury in fish muscle reported for the commercial fish of the Laurentian Great Lakes (140 to 320 ng/g). The average total mercury in the water column (7.5 ng Hg/L; n = 14) was at the upper range normally defined for uncontaminated water (< 10 ng Hg/L). The average mercury concentration in the solid phase of the top 10 cm of sediments was 220 ng Hg/g close to that found in the surface sediments of the Laurentian Great Lakes. Methylmercury measured in the surface water near a variety of wetland vegetation was low with the possible exception of water collected near the roots of the water hyacinth, Eichhornia crassipes. Although the levels of mercury in fish are within the accepted guidelines of the FAO/WHO, the people living in the vicinity of the lake are likely to consume a greater quantity of fish than those living some distance away from the lake. It is important to educate the consumers of the fish from Lake Victoria about any potential risks and to monitor the fish mercury levels.
机译：东非维多利亚湖是世界上生产力最高的淡水渔业的所在地。 2+和3+岁的尼罗河鲈（Lates niloticus）的肌肉组织中的汞（目前是渔业的最大组成部分）的湿重为90至250 ng / g。这与劳伦式五大湖的商品鱼所报告的鱼肉中汞的含量范围相似（140至320 ng / g）。水柱中的平均总汞量（7.5 ng Hg / L； n = 14）在正常范围内的上限，即未受污染的水（<10 ng Hg / L）。顶部10厘米沉积物固相中的平均汞浓度接近Laurentian大湖表层沉积物中的平均汞浓度220 ng Hg / g。在各种湿地植被附近的地表水中测得的甲基汞含量很低，可能是在凤眼兰凤眼莲根部附近收集的水除外。尽管鱼中的汞含量在粮农组织/世卫组织公认的准则之内，但生活在湖泊附近的人比远离湖泊的人食用的鱼类数量可能更多。对维多利亚湖鱼的消费者进行任何潜在风险的教育，并监测鱼的汞含量，这一点很重要。

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