Spatial distribution of trace elements and ecotoxicity of bottom sediments in Rybnik reservoir, Silesian-Poland.
Spatial distribution of trace elements and ecotoxicity of bottom sediments in Rybnik reservoir, Silesian-Poland.
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DOI：
10.1007/s11356-016-6678-1
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发表时间：
2016-09
期刊：
影响因子：
--
通讯作者：
Koniarz T
中科院分区：
文献类型：
--
作者：
Baran A;Tarnawski M;Koniarz T
研究的目的是将化学分析和毒性生物测定结合起来，以评估与沉积物中存在的微量元素有关的环境风险。应用沉积物质量评价方法(SQGs)、潜在生态风险指数(PERI)、污染程度(Cd)和两种生物测定方法--底泥质量指南(SQGs)、潜在生态风险指数(PERI)和污染程度(Cd)--对底泥淋洗液进行细菌发光抑制试验和与介形类甲壳动物异形藻的直接接触试验，探讨了底泥中微量元素的生态意义。样本来自雷布尼克水库的50个站点。库区是以硬煤开采、电力工业、交通运输为主的产业集聚区。尽管沉积物中的金属含量差异很大，但沉积物中微量元素的空间分布非常相似。此外，个别微量元素对之间的强烈正相关性表明，它们可能来自相似的来源并一起移动。根据Mean PECQs，68%的样本是潜在无毒的，32%的样本是潜在有毒的。PERI值显示，70%的沉积物采样点表现出较低的金属污染生态风险，而24%的样本具有严重和严重的风险。根据我们的联合评估，我们认为沉积物样品中的镉和铜经常造成不利的生物效应。在Microtox试验中观察到的毒性反应比Ostracodoxkit试验中的更高。所有底泥样品对鱼腥藻均有毒杀作用，其中96%的样品有50%的有效率。对于不一致梭子藻，12%的沉积物是无毒的，44%的沉积物有效果百分比&50%。为了对金属污染的环境影响进行复杂的评估，应进行化学和生态毒理分析。
The aim of study was to integrate chemical analyses and toxicity bioassays in order to assess the environmental risk connected with the presence of trace elements in the sediments. This study examined the ecological significance of trace elements in bottom sediments by applying a set of complementary sediment quality assessment methods sediment quality guidelines (SQGs) (mean probable effect concentration quotient (PECQ)), potential ecological risk index (PERI), contamination degree (Cd) and two bioassays: the bacterial luminescence inhibition test with Vibrio fischeri on sediment elutriates and the direct contact test with the ostracod crustacean Heterocypris incongruens. The samples were collected from 50 stations of Rybnik reservoir. The reservoir is a region with enormous concentration of industry, mainly hard coal mining, electric power industry, and transportation. Despite the high diversity in metal concentration in the sediments, the spatial distribution of trace elements in the sediments was very similar. Moreover, the strong positive correlations between individual pairs of trace elements indicate that they may derive from a similar source and move together. According to mean PECQs, 68 % of the samples were potentially non-toxic and 32 % of the samples were potentially toxic. PERI values suggested that 70 % of the sediment sampling sites exhibited low ecological risk from metal pollution while 24 % of the samples had severe and serious risk. Based on our combined evaluation, we believe that Cd and Cu in the sediment samples frequently caused adverse biological effects. Higher toxic responses were observed in the Microtox test than in the Ostracodtoxkit test. All the sediment samples were found toxic to V. fischeri, and 96 % of the samples had effect percentages >50 %. For H. incongruens, 12 % of the sediments were not toxic and 44 % had effect percentages >50 %. In order to perform a complex assessment of the environmental impact of metal pollution, both chemical and ecotoxicological analysis should be carried out.
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影响因子：
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作者：
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作者：
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DOI：
10.1016/j.jrras.2015.02.011
发表时间：
2015-07-01
影响因子：
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