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Contribution of Azolla filiculoides to hydrazine elimination from water
Wetlands Ecology and Management ( IF 1.8 ) Pub Date : 2020-04-25 , DOI: 10.1007/s11273-020-09722-3
Reza Eimoori , Jafar Zolala , Hamid Pourmohiabadi , Ebrahim Noroozian , Hakimeh Mansouri

In this research we report the significant effect of the floating water fern Azolla filiculoides on the elimination of hydrazine (N2H4) from water, which is a remarkable role for an aquatic plant. Hydrazine is a highly toxic compound for human health and biodiversity with wide industrial applications. In search of a practical way for hydrazine removal from an industrial wastewater, we studied the possible ability of certain aquatic lower plants to consume hydrazine. In greenhouse experiments, algal samples including Cladophora glomerata, Cosmarium sp. and Chlorella sp. did not show a significant effect on the rate of hydrazine elimination from water. However, A. filiculoides showed considerable growth when using hydrazine as the sole source of nitrogen. It was able to tolerate up to 4 mg/l hydrazine in the nutrient solution. During more than one month at the scale of 1/1000, Azolla removed hydrazine from boiler blowdown in the real conditions of a combined-cycle power plant. To our knowledge, this is the first observation of hydrazine consumption by a eukaryotic structure. Although we have discussed some possibilities, the exact mechanism of the process remains to be uncovered. On the other hand, considering the well-known abilities for bioremediation of a large number of contaminants from water, Azolla would be able to work as part of a cost effective system for remediation of hydrazine along with many other pollutants from different kinds of contaminated water. However, using Azolla in a hydrazine remediation system needs detailed feasibility studies to take various considerations into account.

中文翻译:

满江红消除水中肼的贡献。

在这项研究中,我们报告了漂浮的水蕨类固氮藻对从水中消除肼(N 2 H 4)的显著作用,这对于水生植物具有显着的作用。肼是一种对人体健康和生物多样性有高毒性的化合物,具有广泛的工业应用。为了寻找从工业废水中去除肼的实用方法,我们研究了某些水生低等植物消耗肼的可能能力。在温室实验中,藻类样品包括球根藻(Cladophora glomerata)Co(Cosmarium sp。)。和小球藻属。对肼从水中的去除速率没有显着影响。然而,当使用肼作为唯一的氮源时,拟南芥显示出相当大的生长。它能够耐受营养液中高达4 mg / l的肼。在一个月的1/1000规模内,Azolla在联合循环电厂的实际条件下从锅炉排污中去除了肼。据我们所知,这是首次通过真核结构观察到肼的消耗。尽管我们已经讨论了一些可能性,但是该过程的确切机制仍有待发现。另一方面,考虑到众所周知的对水中大量污染物进行生物修复的能力,Azolla将能够作为一种经济高效的系统的一部分,用于修复肼以及来自不同类型污水的许多其他污染物。但是,在肼修复系统中使用Azolla需要进行详细的可行性研究,以考虑各种因素。
更新日期:2020-04-25
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