...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >INFLUENCE OF WATER CHEMISTRY ON THE ACUTE TOXICITY OF COPPER AND ZINC TO THE CLADOCERAN CERIODAPHNIA CF DUBIA
【24h】

INFLUENCE OF WATER CHEMISTRY ON THE ACUTE TOXICITY OF COPPER AND ZINC TO THE CLADOCERAN CERIODAPHNIA CF DUBIA

机译：水化学对铜和锌对中华绒螯蟹CF迪拜急性毒性的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study determined the influence of key water chemistry parameters (pH, alkalinity, dissolved organic carbon [DOC], and hardness) on the aqueous speciation of copper and zinc and its relationship to the acute toxicity of these metals to the cladoceran Ceriodaphnia cf dubia. Immobilization tests were performed for 48-h in synthetic or natural waters buffered at various pH values from 5.5 to 8.4 (other chemical parameters held constant). The toxicity of copper to C. cf dubia decreased fivefold with increasing pH, whereas the toxicity of zinc increased fivefold with increasing pH. The effect of DOC on copper and zinc toxicity to C. cf dubia was determined using natural fulvic acid in the synthetic water. Increasing DOC was found to decrease linearly the toxicity of copper, with the mean effect concentration of copper that immobilized 50% of the cladocerans (EC50) value 45 times higher at 10 mg/L, relative to 0.1 mg/L DOC at pH 6.5. In contrast, the addition of 10 mg/L DOC only resulted in a very small (1.3-fold) reduction in the toxicity of zinc to C. cf dubia. Copper toxicity to C. cf dubia generally did not vary as a function of hardness, whereas zinc toxicity was reduced by a factor of only two, with an increase in water hardness from 44 to 374 mg CaCO_3/L. Increasing bicarbonate alkalinity of synthetic waters (30-125 mg/L as CaCO_3) decreased the toxicity of copper up to fivefold, which mainly could be attributed to the formation of copper-carbonate complexes, in addition to a pH effect. The toxicity of copper added to a range of natural waters with varying DOC content, pH, and hardness was consistent with the toxicity predicted using the data obtained from the synthetic waters.
机译：这项研究确定了关键的水化学参数（pH，碱度，溶解的有机碳[DOC]和硬度）对铜和锌的水形态的影响以及与这些金属对锁骨角eri Ceriodaphnia cf dubia的急性毒性的关系。在合成水或天然水中缓冲pH为5.5至8.4（其他化学参数保持不变）的环境中进行了48小时的固定化测试。铜对C. cf胫骨的毒性随着pH的增加而降低了五倍，而锌的毒性随着pH的增加而增加了五倍。使用天然黄腐酸在合成水中测定DOC对铜和锌对杜氏梭菌毒性的影响。已发现增加DOC线性降低了铜的毒性，在pH值为6.5时，固定在10 mg / L的claderceran（EC50）值的50％的铜的平均作用浓度高出45倍，相对于0.1 mg / L DOC。相比之下，添加10 mg / L DOC仅导致锌对C. cf dubia的毒性降低非常小（1.3倍）。铜对杜鹃的毒性一般不随硬度变化，而锌的毒性仅降低2倍，水硬度从44 mg CaCO_3 / L增加至374 mg。合成水的碳酸氢盐碱度增加（CaCO_3为30-125 mg / L）将铜的毒性降低了五倍，这主要归因于pH值影响形成碳酸铜铜配合物。添加到一系列具有不同DOC含量，pH和硬度的天然水中的铜的毒性与使用从合成水获得的数据预测的毒性一致。

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