• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Nuclear Atlantic Conference >Acute Toxicity over Ceriodaphnia silvestrii and Daphnia magna: Bioassays with Water Samples from a Dam under the influence of Uranium Mine and with Manganese
【24h】

Acute Toxicity over Ceriodaphnia silvestrii and Daphnia magna: Bioassays with Water Samples from a Dam under the influence of Uranium Mine and with Manganese

机译：Ceriodaphnia silvestrii和Daphnia magna的急性毒性：生物测定与铀矿和锰的影响下的水样

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

摘要

Treated effluents from uranium mine with acid mine drainage can impact receiving water bodies. AMD is relevant from the environmental view due to the large volume of effluents generated, known to affect aquatic biota. Studies show that one of the main problems of treated effluents released by UTM/INB on the catchment basin of Ribeirao das Antas is associated to high Mn values in water samples. In this context, acute 48-h toxicity tests with Mn were conducted with Ceriodaphnia silvestrii and Daphnia magna to determine the No Observed Effect Concentration (NOEC) and the Observed Effect Concentration (OEC) in laboratory bioassays and to verify the potential toxicity of the Mn in face of concentrations found in water samples from the Antas Dam, which receives treated effluents from UTM/INB. In this study, preliminary results of acute toxicity for C. silvestrii indicated OEC values between 9.0 and 10.0 mg Mn/L and NOEC < 3.0 mg Mn/L. For D. magna, OEC and NOEC concentrations were ≥ 30 mg Mn/L and ≤ 80 mg Mn/L, respectively. It was verified that Mn concentrations determined in environmental samples registered the highest value at 1.75 mg Mn/L, below the OEC concentrations recorded for both species. Since manganese occurs in the composition of the effluent that may contain other stable and radioactive elements, complementary ecotoxicological tests must be conducted, aiming at the assessment of synergistic and antagonistic effects of the chemical mixture that makes up the radioactive effluents that are treated and released at the Antas Dam. Such bioassays are underway in the Radioecology Laboratory at LAPOC/CNEN.
机译：用酸矿排水从铀矿化处理的污水可能会影响接受水体。由于产生的污水量大量产生，AMD与环境视图相关，已知会影响水生生物群。研究表明，UTM / INB在Ribeiroao Das Antas的集水区盆地上释放的处理过水物的主要问题与水样中的高MN值相关。在这种情况下，用Ceriodaphnia Silvestrii和Daphnia Magna进行急性48小时毒性试验，以确定实验室生物测定中未观察到的效果浓度（NOEC）和观察到的效果浓度（OEC），并验证MN的潜在毒性面对来自Antas Dam的水样中的浓度，从UTM / INB接收处理过的流出物。在该研究中，C.Silvestrii的急性毒性的初步结果表明了9.0-0.0mg MN / L和NOEC <3.0mg MN / L之间的OEC值。对于D. MAGNA，OEC和NOEC浓度分别≥30mgmM/ l和≤80mgmn / l。验证了在环境样品中测定的Mn浓度登记的最高值为1.75mg MN / L，低于对两种物种记录的OEC浓度。由于锰发生在可能含有其他稳定和放射性元件的流出物的组成中，必须进行互补的生态毒理学测试，旨在评估化学混合物的协同和拮抗作用，该化学混合物构成了处理和释放的放射性流出物安塔斯大坝。在Lapoc / Cnen的射读实验室正在进行这种生物测定。

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