Monitoring of fish and human exposure to mercury due to gold mining in the Lake Victoria goldfields, Tanzania
Monitoring of fish and human exposure to mercury due to gold mining in the Lake Victoria goldfields, Tanzania
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DOI：
10.1016/0048-9697(96)05178-9
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发表时间：
1996-11-18
影响因子：
9.8
通讯作者：
Akagi, H
中科院分区：
文献类型：
--
作者：
Ikingura, JR;Akagi, H
对坦桑尼亚维多利亚湖金矿区Nungwe湾地区环境和人类汞接触情况的监测显示，鱼类（范围：1.8-16.9 ppb，平均值：7.0 ppb）和人发（范围：156-5433 ppb，平均值：947 ppb）中的汞浓度较低，代表背景水平。金矿开采并未导致环境中可用于水生食物链生物模拟的甲基汞显著增加。在汞齐化和汞合金燃烧过程中经常接触汞蒸气的金矿工人的尿汞水平（平均值：241 ng/ml）明显高于非汞职业暴露的一般矿山人群（平均值：2.6 ng/ml）。矿山工作的轮换减少了金矿工人的汞接触水平，从而降低了中毒风险。Nungwe湾渔村居民的尿汞和头发汞含量最低。这与Nungwe湾居民食用的鱼中汞含量低的情况相一致。
Monitoring of environmental and human exposure to mercury in the Nungwe Bay area of the Lake Victoria goldfields, Tanzania, has revealed low mercury concentrations in fish (range: 1.8-16.9 ppb, mean: 7.0 ppb) and human hair (range: 156-5433 ppb, mean: 947 ppb) that represent background levels. Gold mining has not produced a significant increase in environmental methylmercury that is available for bioaccummulation in aquatic food chains. Urinary mercury levels in gold mine workers frequently exposed to Hg vapour in amalgamation and burning of amalgam were significantly higher (mean: 241 ng/ml) than those in the general mine population not occupational exposed to Hg (mean: 2.6 ng/ml). Rotation of mine duties reduced Hg exposure levels and hence the risk of intoxication in the gold mine workers. The lowest urinary and hair mercury levels were found in the Nungwe Bay fishing village population. This was consistent with the low mercury content of fish consumed by the inhabitants of the Nungwe Bay.