o:5229 The effect of water, sediment and soil samples potentially polluted by former mining activities from Moldova Noua Area (Romania) on the Growth of the Common Duckweed (Lemna Minor L.) : 10th International Online Conference Tourism and Sustainable Development, Timisoara, Romania, 5-7 May (2022) en Abstract: The abandoned mining dumps generated by the former copper mining activities from Moldova Nouă area represent a potential pollution threat to both human health and the environment. As the assessment of ecotoxicity is essential for the potentially polluted area, the common duckweed (Lemna minor) was used for the analysis of several sample types. Water, sediment, and soil samples were collected in October 2020, February, May and July 2021 from several sampling points, all in the area of Moldova Nouă. The effects on common duckweed of the collected samples were investigated with a growth inhibition assay which involved the exposure for 7 days of a total number of 10 duckweed fronds for each sample. The water samples were tested without diluting the samples, while the sediment and soil samples were diluted with culture media reaching a concentration of 1%. The effect of heavy metal concentration on ecotoxic effect was also assessed. None of the tested samples showed ecotoxic effects to duckweed, although some samples showed a slight reduction of green frond number. It was observed that Mn, Fe, cd, Zn and Pb affected the number of green fronds after exposure to the tested samples. Keywords: common duckweed, ecotoxicity, mining, Moldova Nouă, pollution, heavy metals. 91552100 134917129 2024-08-20T10:36:01.393Z 44 no 46 Bianca Boros West University of Timisoara, Department of Biology-Chemistry and Advanced Environmental Research Laboratories 0000-0003-4362-7615 Diana-Larisa Roman West University of Timisoara, Department of Biology-Chemistry person 0000-0001-5212-4628 Constantina Bianca Vulpe West University of Timisoara, Department of Biology-Chemistry person 0009-0004-9229-2529 Daniela Dascalu West University of Timisoara, Department of Biology-Chemistry and Advanced Environmental Research Laboratories person 0000-0002-0424-1245 Renata Kovačević Institut za rudarstvo i metalurgiju Bor person 60032521 0000-0003-4108-0855 Zoran Stevanović Institut za rudarstvo i metalurgiju Bor person 9619303 0000-0001-5317-6884 Vasile Ostafe West University of Timisoara, Department of Biology-Chemistry and Advanced Environmental Research Laboratories person 0000-0003-1352-1115 Adriana Isvoran West University of Timisoara, Department of Biology-Chemistry and Advanced Environmental Research Laboratories person 0000-0002-3068-2642 application/pdf 821038 https://unilib.phaidrabg.rs/o:5229 no yes 1 70 92000004 71A03 Programme of the 10th International conference on tourism and sustainable development Timişoara, May 6, 2022 2022