首页> 外文期刊>The Science of the Total Environment >Sublethal and chronic effects of reclaimed water on aquatic organisms. Looking for relationships between physico-chemical characterisation and toxic effects
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Sublethal and chronic effects of reclaimed water on aquatic organisms. Looking for relationships between physico-chemical characterisation and toxic effects

机译:再生水对水生生物的亚致死和慢性影响。寻找理化特性与毒性作用之间的关系

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The use of reclaimed water for irrigation and aquaculture purposes is generally considered a reliable alternative for sustainable water management in regions with water scarcity. Many organic compounds, generally called compounds of emerging concern (CECs), have been detected in reclaimed water, which implies continuous exposure for aquatic organisms. To date no quality criteria have been proposed for this group of compounds. This work aims to assess the acute, sublethal and chronic effects of reclaimed water using two representative organisms of the aquatic compartment; the green algaChlorella vulgarisand the microcrustaceanDaphnia magna. The study comprises the 72 h-algal growth inhibition test, theD. magnafeeding bioassay and theD. magnareproduction test. The results highlighted, for the selected characterised compounds, no differences in the concentrations between the different tertiary WWTP treatments, except for the particular case of carbamazepine. Considering seasonality, no differences were observed between the two different sample collection campaigns. The sublethal and chronic effects observed for these samples could not be explained by the lower concentrations found in the chemical characterisation. However, in the majority of cases, dilution of raw reclaimed water reduced the toxic effects of these samples. Several interactions among compounds can affect the mixture's toxicity. Canonical correlation analyses (CCA) were included to explore the potential relationships between the physico-chemical characterisation of reclaimed water and effects on aquatic organisms. The results corroborated the toxic effect of some pharmaceuticals, in particular beta-blockers and antibiotics, on the growth and yield of green algae, as well as inhibition of daphnia reproduction. Thus the CCA methods could help to elucidate the potential relationships between the physico-chemical characterisation and toxic effects by considering all the potential interactions.
机译:在缺水地区,将再生水用于灌溉和水产养殖通常被认为是可持续水管理的可靠选择。在再生水中发现了许多有机化合物,通常称为新兴关注的化合物(CEC),这意味着水生生物持续接触。迄今为止,尚未提出针对这组化合物的质量标准。这项工作的目的是利用水生隔间的两种代表性生物评估再生水的急性,亚致死和慢性影响;绿藻为小球藻和小甲壳纲水蚤。该研究包括72 h h藻类生长抑制试验theD。饲喂生物测定法和D.生产测试。结果突出显示,对于选定的特征化合物,除了卡马西平的特殊情况外,不同的三级WWTP处理之间的浓度没有差异。考虑到季节性,两个不同的样本收集活动之间没有发现差异。这些样品所观察到的亚致死和慢性影响无法用化学表征中发现的较低浓度来解释。但是,在大多数情况下,对原始再生水进行稀释会降低这些样品的毒性作用。化合物之间的几种相互作用会影响混合物的毒性。包括典型相关分析(CCA),以探讨再生水的物理化学特征与对水生生物的影响之间的潜在关系。结果证实了某些药物,特别是β-受体阻滞剂和抗生素对绿藻的生长和产量的毒性作用,以及对水蚤繁殖的抑制作用。因此,CCA方法可以通过考虑所有潜在的相互作用来帮助阐明理化特征与毒性作用之间的潜在关系。

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