...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >Determination of Bioavailable Aluminum in Natural Waters in the Presence of Suspended Solids
【24h】

Determination of Bioavailable Aluminum in Natural Waters in the Presence of Suspended Solids

机译：悬浮固体存在下天然水中生物可利用铝的测定

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

Analyses of natural waters frequently show elevated levels of total aluminum (Al) attributable to acid extraction of Al from the total suspended solids (TSS) minerals. Hence, there is a need for an analytical method that measures only bioavailable Al. Natural waters high in TSS were collected to study the chronic effects of Al on Ceriodaphnia dubia. In the collected waters TSS ranged from 30 to 411 mg/L; total Al concentrations ranged from 2.0 to 44.8 mg/L. The TSS in natural waters inhibited reproduction of C. dubia up to 40% in comparison to the same filtered waters. This inhibition did not correlate with the concentration of TSS or total Al; it was attributed to nutritional deficiency and was prevented by increasing the food supply. To demonstrate that toxicity can be measured in natural waters, samples with elevated TSS were spiked with soluble Al, and survival and reproduction were measured in chronic studies performed at pH 6.3 and 8.0. To properly characterize the Al concentrations in the toxicity studies, a method was needed that could discriminate bioavailable Al from mineral forms of Al. An extraction method at pH 4 for bioavailable Al was developed and evaluated using C. dubia chronic toxicity studies in the presence of TSS. It is concluded that the proposed method is better able to discriminate chronic toxicity effects attributable to bioavailable Al from mineralized nontoxic forms of Al compared with existing methods using total or total recoverable Al (i.e., extraction at pH = 1.5). We propose that this new method be used when assessing the potential for Al in natural surface waters to cause toxicity. Environ Toxicol Chem 2019;38:1668-1681. (c) 2019 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals, Inc. on behalf of SETAC.
机译：天然水分的分析经常显示出可归因于酸提取的铝（Al）的升高水平，从总悬浮的固体（TSS）矿物质中。因此，需要一种分析方法，该方法仅测量生物可利用的Al。收集了TSS的天然水域，以研究Al对Ceriodaphnia Dubia的慢性效应。在收集的水域中，TSS的范围为30至411 mg / L;总浓度范围为2.0至44.8 mg / l。与相同过滤的水相比，天然水中的TSS抑制了高达40％的C. Dubia的繁殖。该抑制与TSS或TOTAL的浓度无关;它归因于营养缺乏，并通过增加食品供应来防止。为了证明可以在天然水中测量毒性，用可溶性Al掺入具有升高的TS的样品，并在pH6.3和8.0进行的慢性研究中测量存活和繁殖。为了适当地表征毒性研究中的铝浓度，需要一种可以从矿物形式区分生物可利用者的方法。在TSS存在下，使用C. Dubia慢性毒性研究开发和评估了生物可利用Al的pH 4的提取方法。得出结论是，与使用总可回收的Al（即pH <= 1.5的萃取）相比，该方法可以更好地能够从矿化无毒形式的矿化无毒形式的含有生物化无毒形式的慢性毒性效应。我们建议在评估天然表面水域中的Al潜力以引起毒性时使用这种新方法。环境毒素科学2019; 38：1668-1681。 （c）2019年作者。由Wiley期刊，Inc。代表Setac出版的环境毒理学和化学。

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