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首页> 外文期刊>Environmental toxicology and chemistry >EFFECTS OF SELECTED BIOCIDES USED IN THE DISINFECTION OF COOLING TOWERS ON TOXICITY AND BIOACCUMULATION IN ARTEMIA LARVAE
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EFFECTS OF SELECTED BIOCIDES USED IN THE DISINFECTION OF COOLING TOWERS ON TOXICITY AND BIOACCUMULATION IN ARTEMIA LARVAE

机译：冷却塔消毒中使用的精选杀生物剂对半衰期幼虫的毒性和生物累积的影响

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This paper reports the acute toxicity of three biocides used in the disinfection of cooling towers, tetrakis(hydroxymethyl) phosphonium chloride (THPC), trichloroisocyanuric acid (TCIC), and sodium bromide (NaBr), on Artemia larvae, their effect on the phototactic response of this organism, and the potential of bioaccumulation in this species. The 24-h median lethal concentration (LC50) values for these biocides with respect to 24-, 48-, and 72-h-old Artemia, determined by static bioassays, showed the following rank order of toxicity: THPC < TCIC < NaBr. An age-dependent increase in sensitivity was seen for each compound. All three biocides reduced the phototactic response of 24-h-old Artemia larvae in 24-h static bioassays; the median inhibitory concentration ratios obtained were 30 to 40 times lower than their respective 24-h LC50 values. The results suggest that phototaxis bioassays could provide the speed and simplicity required for screening many potential pollutants for harmful effects. The bioconcentration factors obtained for Artemia larvae exposed to 10% LC50 for 168 h in renewal assays were 93.75, 1.67, and 0.23 for THPC, TCIC, and NaBr, respectively. This shows these biocides pose no bioaccumulation risk in this organism, although the value of 93.75 obtained for THPC is close to the threshold above which such a risk is considered to exist.
机译：本文报告了冷却塔消毒中使用的三种杀菌剂，四（羟甲基）氯化chloride（THPC），三氯异氰尿酸（TCIC）和溴化钠（NaBr）对卤虫幼虫的急性毒性，以及它们对光战术反应的影响。生物体的生物多样性，以及该物种生物蓄积的潜力。通过静态生物测定确定的这些杀生物剂相对于24、48和72 h卤虫的24 h致死浓度（LC50）值显示出以下毒性等级：THPC

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