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首页> 外文期刊>Analytical Sciences >Heavy-Metal Pollution and Its State in Algae in Kakehashi River and Godani River at the Foot of Ogoya Mine, Ishikawa Prefecture
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Heavy-Metal Pollution and Its State in Algae in Kakehashi River and Godani River at the Foot of Ogoya Mine, Ishikawa Prefecture

机译：石川县大谷屋山脚下的喀什桥河和高谷河藻类中的重金属污染及其状况

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Alga as Achnanthes minutissima among diatoms is a widely adaptable taxon on the state of an aquatic environment. In this study, it was found that diatom had a specific tolerance to heavy metals (Cu, Zn, Pb, and Cd etc.) in river water samples, because the diatom assemblage consisted of almost only Achnanthes minutissima in Kakehashi river and Godani river, which were polluted with waste water from Ogoya copper mine. The relationship between the concentrations of heavy metals (Cu, Zn, Pb and Cd) in river water and the attached substances (algae and silt etc.) and the relative abundances of diatom taxa were investigated in detail. The results indicated that the higher is the concentration of heavy metals in the river environment, the higher is only the relative abundances of Achnanthes minutissima. Thus, the taxon can be used as a bioindicator of heavy metal pollution. The relative rates of toxic chemical forms of copper in algae were 61 - 92% in the attached substances and 49 - 70% in the sediment on the river bed, respectively. Therefore, it was found that diatom as Achnanthes minutissima had a tolerance to heavy metals in river water, being able to live in such an environment. Since the water treated with calcium hydroxide from the deposition reservoir of Ogoya mine enters in Godani river, the river is polluted by heavy metals (Cu, Zn, Pb and Cd etc.). From the viewpoint of both biological and chemical analyses, Godani river is still polluted with heavy metals, because their concentrations in the river samples were very high. On the other hand, in Kakehashi river, the concentrations of heavy metals were very low and the distributions of some diatoms appeared in an unpolluted Nishimata river were observed. Therefore, Kakehashi river seems to be considerably recovered from heavy-metal pollution after closing the Ogoya mine.
机译：藻类作为硅藻中的Achnanthes minutissima是一种在水生环境方面广泛适用的分类单元。在这项研究中，我们发现硅藻对河水样品中的重金属（铜，锌，铅和镉等）具有特定的耐受性，因为硅藻的组合物几乎只由喀什哈希河和戈达尼河中的Achnanthes minutissima组成，它们被名古屋铜矿的废水污染了。详细研究了河水中重金属（铜，锌，铅和镉）的浓度与附着物（藻类和淤泥等）之间的关系以及硅藻类群的相对丰度。结果表明，河流环境中的重金属含量越高，仅Achnanthes minutissima的相对丰度就越高。因此，该分类单元可用作重金属污染的生物指示剂。藻类中铜的有毒化学形式的相对比率在附着物质中分别为61-92％，在河床沉积物中的相对比率为49-70％。因此，发现硅藻作为Achnanthes minutissima具有对河水中重金属的耐受性，能够生活在这样的环境中。由于来自Ogoya矿床沉积库的氢氧化钙处理过的水进入Godani河，因此该河被重金属（Cu，Zn，Pb和Cd等）污染。从生物学和化学分析的角度来看，戈达尼河仍然被重金属污染，因为它们在河流样品中的浓度非常高。另一方面，在Kakehashi河中，重金属的浓度很低，并且在未污染的Nishimata河中观察到一些硅藻的分布。因此，关掉名古屋矿山之后，似乎可以从重金属污染中大大地恢复出Kakehashi河。

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