当前位置: X-MOL 学术Ecotoxicology. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Influence of feeding and organism age on the acute toxicity of sodium bromide to Artemia salina
Ecotoxicology ( IF 2.4 ) Pub Date : 2021-05-02 , DOI: 10.1007/s10646-021-02417-2
David A. Pillard , Kelly L. Tapp

Bromide is a common ion found in freshwater and marine systems. Although normally at relatively low concentrations, higher levels may occur in point-released wastewaters as well as nonpoint runoff from agricultural or industrial locations where bromide compounds are used as biocides and disinfectants. In this study, the potential toxicity of NaBr in a saltwater environment was studied using the brine shrimp, Artemia salina. The confounding factors of organism age at test initiation and pre-test feeding were included in the test design. Survival of brine shrimp nauplii in several NaBr treatments up to 11,000 mg Br/L (measured) was assessed after 24 h in both fed- and unfed-tests. In tests with unfed organisms, only the youngest (<24 h old) nauplii had acceptable control survival (≥90%), while control survival for all of the tests with fed organisms (<24 h old, <48 h old, <72 h old) was acceptable. There was also greater and more erratic mortality in the unfed tests. These data indicate feeding A. salina prior to initiating a short-term acute test improved performance. Not feeding the test organisms, especially in longer tests or when using >24 h old organisms, may result in excessive control mortality and an invalid test. These studies show that, when healthy organisms are used in the toxicity tests, 11,000 mg/L of Br (~14,200 mg/L NaBr) is not acutely toxic to Artemia salina.



中文翻译:

摄食和生物年龄对溴化钠对盐卤急性毒性的影响

溴化物是淡水和海洋系统中常见的离子。尽管通常浓度较低,但在将溴化物用作杀生物剂和消毒剂的农业或工业场所的点释放废水以及非点径流中,可能会出现更高的浓度。在这项研究中,使用卤水虾卤虫(Artemia salina)研究了NaBr在盐水环境中的潜在毒性。测试设计中包括测试开始和测试前喂养时生物体年龄的混杂因素。卤虫无节幼体成活率在几个溴化钠治疗高达11000毫克溴-喂食和不喂食测试均在24小时后评估/ L(测量值)。在未喂养生物的测试中,只有最年轻(<24 h)的无节幼体具有可接受的对照存活率(≥90%),而所有饲喂生物的测试(<24 h,<48 h,<72)的对照存活率均可接受。 h岁)是可以接受的。在未进食的测试中,死亡率也越来越高,越来越不稳定。这些数据表明,在开始短期急性试验前饲喂盐沼可以改善性能。不喂食测试生物,尤其是在较长的测试中或使用大于24小时的旧生物时,可能导致过多的对照死亡率和无效的测试。这些研究表明,当健康生物体的毒性试验中使用,11000毫克/溴L的- (〜14200毫克/升的NaBr)不剧毒到卤虫

更新日期:2021-05-03
down
wechat
bug