...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of the Brazilian Chemical Society >Total and methyl mercury in different species of molluscs from two estuaries in Rio de Janeiro State
【24h】

Total and methyl mercury in different species of molluscs from two estuaries in Rio de Janeiro State

机译：里约热内卢州两个河口不同软体动物物种的总汞和甲基汞

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The paper assesses methyl and total mercury concentrations in three mollusc species (Perna perna - common mussel, Crassostrea rhizophorae - mangrove oyster, Anomalocardia brasiliana - clam) from two estuaries in Rio de Janeiro State, both impacted by organic matter and heavy metals. Mussels showed higher capacity to accumulate mercury compared to the other mollusc species (oyster, clam). A significant difference was observed between mercury concentration in the female mussel organisms and in males (81 ± 1 μg kg-1 dry wt. and 70 ± 5 μg kg-1 dry wt. respectively) with similar total shell length. No significant difference was observed among the % MeHg in the female (64%) and male (63%) mussel organisms. Even though the feeding habits of the molluscs are similar; mussels presented higher mercury and methylmercury concentrations in their soft tissues (76 ± 7 μg kg-1 dry wt. and 48 ± 5 μg kg-1 dry wt.) than oysters (19 ± 4 μg kg-1 dry wt. and 6 ± 1 μg kg-1 dry wt.). This is possible related to their capacity to select particle size and the composition of the ingested food they assimilate, and also reflects the greater ability of mussels to concentrate and excrete methylmercury and also to reflect their environmental conditions.
机译：该论文评估了里约热内卢州两个河口的三个软体动物物种（Perna佩纳-普通贻贝，Crassostrea rhizophorae-红树林牡蛎，巴西异常动物-蛤）的甲基和总汞浓度，这两个物种均受到有机物质和重金属的影响。与其他软体动物（牡蛎，蛤）相比，贻贝具有更高的积累汞的能力。在总壳长相似的情况下，雌性贻贝生物和雄性贻贝中的汞浓度之间存在显着差异（分别为81±1μgkg-1干重和70±5μgkg-1干重）。在雌性（64％）和雄性（63％）贻贝生物中，％MeHg之间没有观察到显着差异。即使软体动物的摄食习性是相似的;贻贝在其软组织中的汞和甲基汞浓度（76±7μgkg-1干重和48±5μgkg-1干重）比牡蛎（19±4μgkg-1干重和6± 1μgkg-1干重。这可能与它们选择颗粒大小的能力以及它们所吸收的摄取食物的成分有关，并且还反映出贻贝具有更高的浓缩和排泄甲基汞的能力，还可以反映其环境条件。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号