{"title":"Relation entre toxicité et formes libres de quelques metaux traces","authors":"J Pommery, M Imbenotte, F Erb","doi":"10.1016/0143-148X(85)90028-X","DOIUrl":null,"url":null,"abstract":"<div><p>The toxicity of trace metals, as free species or in complexed form with humic acids, has been studied by means of a medium-term daphnia test. Four parameters relative to sublethal effects and two lethal criteria were determined over a 30-day period. The toxicity due to metal concentrations—cadmium, 5 μg litre<sup>−1</sup>; copper, 15 μg litre<sup>−1</sup> and zinc, 50 μg litre<sup>−1</sup>—was significantly established.</p><p>Free metal concentrations were determined by differential pulse anodic stripping voltammetry and correlated with toxic effects. Comparison of the equations of the regression lines revealed that the effect of humic acids is not restricted to a pure detoxication by complexation. Their presence modifies the toxic behaviour of free metals, as confirmed by the evaluation of the 30-day LC<sub>50</sub>.</p></div>","PeriodicalId":100484,"journal":{"name":"Environmental Pollution Series B, Chemical and Physical","volume":"9 2","pages":"Pages 127-136"},"PeriodicalIF":0.0000,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0143-148X(85)90028-X","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Pollution Series B, Chemical and Physical","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0143148X8590028X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
The toxicity of trace metals, as free species or in complexed form with humic acids, has been studied by means of a medium-term daphnia test. Four parameters relative to sublethal effects and two lethal criteria were determined over a 30-day period. The toxicity due to metal concentrations—cadmium, 5 μg litre−1; copper, 15 μg litre−1 and zinc, 50 μg litre−1—was significantly established.
Free metal concentrations were determined by differential pulse anodic stripping voltammetry and correlated with toxic effects. Comparison of the equations of the regression lines revealed that the effect of humic acids is not restricted to a pure detoxication by complexation. Their presence modifies the toxic behaviour of free metals, as confirmed by the evaluation of the 30-day LC50.
通过中期水蚤试验研究了游离态或与腐植酸络合态微量金属的毒性。在30天内确定了与亚致死效应有关的四个参数和两个致死标准。金属浓度的毒性——镉，5 μg升−1;铜15 μg l - 1和锌50 μg l - 1显著建立。用差分脉冲阳极溶出伏安法测定游离金属浓度，并与中毒效应相关。对回归线方程的比较表明，腐植酸的作用并不局限于单纯的络合解毒。它们的存在改变了游离金属的毒性行为，30天LC50的评估证实了这一点。
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
