Int J Phytoremediation. 2014;16(7-12):1228-40. doi: 10.1080/15226514.2013.821454.
Contamination of water resources by mine effluents is a serious environmental problem. In a old coal mine, in the north of Portugal (São Pedro da Cova, Gondoma),forty years after the activity has ended, a neutral mine drainage, rich in iron (FE) it stills being produced and it is continuously released in local streams (Ribeiro de Murta e Rio Ferreira) and in surrounding lands. The species Lemna minor has been shown to be a good model for ecotoxicological studies and it also has the capacity to bioaccumulate metals. The work aimed test the potential of the species L. minor to remediate this mine effluent, through the bioaccumulation of Fe, under greenhouse experiments and, at the same time, evaluate the time required to the maximum removal of Fe. The results have shown that L. minor was able to grow and develop in the Fe-rich effluent and bioaccumulating this element. Throughout the 21 days of testing it was found that there was a meaningful increase in the biomass of L. minor both in the contaminated and in the non-contaminated waters. It was also found that bioaccumulation of Fe (iron) occurred mainly during the first 7 days of testing. It was found that L. minor has potential for the bioremediation of effluents rich in iron.
矿废水污染水资源是一个严重的环境问题。在葡萄牙北部（São Pedro da Cova，Gondoma）的一个老煤矿，在活动结束四十年后，仍在产生中性矿排水，富含铁（FE），并持续释放到当地溪流（Ribeiro de Murta e Rio Ferreira）和周边地区。浮萍被证明是生态毒理学研究的良好模型，它也具有金属生物累积的能力。本工作旨在通过在温室实验下，利用浮萍对 Fe 的生物累积，测试该物种修复这种矿废水的潜力，并同时评估最大程度去除 Fe 所需的时间。结果表明，浮萍能够在富铁废水中生长和发育，并吸收这种元素。在 21 天的测试过程中，发现在污染和非污染水中，浮萍的生物量都有明显的增加。还发现，Fe（铁）的生物累积主要发生在测试的前 7 天。研究发现，浮萍具有富铁废水生物修复的潜力。
