Department of Biology, "Alexandru Ioan Cuza" University of Iasi, Faculty of Biology, 700505 Iasi, Romania.
Department of Environmental Engineering and Management, "Gheorghe Asachi" Technical University of Iasi, 73, "Prof. Dr. D. Mangeron" Street, 700050 Iasi, Romania.
J Environ Health Sci Eng. 2015 Jan 25;13:5. doi: 10.1186/s40201-015-0161-7. eCollection 2015.
Heavy metals like Cu, Cd, Pb, Ni, Co and Cr can naturally be found almost all over this planet in various amounts. Urban activities such as heavy metal industry, traffic and waste can rapidly increase the metal concentrations in a fresh water ecosystem.
This study was done in natural conditions to capture as many aspects in heavy metals pollution and bioremediation of Nicolina River, Romania considered a stream model which is under anthropogenic pressure. Water, sediment and leaves samples of Typha latifolia L. were collected during October 2013 and analyzed in order to assess certain heavy metals (Cu, Cd, Pb, Ni, Co and Cr) from each sampling site using GF-HR-CS-AAS with platform. Heavy metals in significant concentrations in cattail samples were correlated with the water parameters to show the possibility to use the cattail leaves as indicators in heavy metals pollution with potential in bioremediation because they can be easily harvested in autumn and this species is spread worldwide.
The levels of metals concentrations in leaves were: Cu > Ni > Cr > Pb > Co knowing that copper is an essential element for plants. The sampling time was important to draw the river diagnosis for heavy metal pollution. The samples were collected, from river, after more than 60 days without rain same as a "human patient" prepared for blood test. Cobalt was considered the metal marker because it was an element with the lowest level of usage in the city. Compared with it only lead, cadmium and copper were used intensively in the industrial activities.
T. latifolia L. can be use as an indicator for the health of the studied stream and it was noticed that the heavy metals were not accumulated, although the metal uptake was influenced by sediments and water parameters. The alkalinity of the studied river acts as an inhibitor in the bioremediation process of cattail for cadmium and copper. Lead was uptake by leaves and the water parameters influenced it but it wasn't concentrated enough in leaves to propose this species in lead bioremediation process for Nicolina River.
铜、镉、铅、镍、钴和铬等重金属在这个星球上几乎无处不在，其含量也各不相同。重金属工业、交通和废物等城市活动会迅速增加淡水生态系统中的金属浓度。
本研究在自然条件下进行，以捕捉罗马尼亚尼科利纳河重金属污染和生物修复的多个方面，该河被视为受到人为压力的溪流模型。2013 年 10 月，采集了香蒲的水、沉积物和叶片样本，并用平台式 GF-HR-CS-AAS 分析了每个采样点的某些重金属（铜、镉、铅、镍、钴和铬）。与水参数相关的大型植物样本中的重金属含量表明，由于香蒲在秋季易于收获且分布广泛，因此该植物叶片可作为重金属污染的指示物，并具有生物修复的潜力。
叶片中的金属浓度水平为：铜>镍>铬>铅>钴，因为铜是植物的必需元素。采样时间对于河流重金属污染的诊断很重要。采集的样本是在河流中，在 60 多天没有降雨后，与为血液测试做好准备的“人类患者”一样。钴被认为是金属标志物，因为它是城市中使用量最低的元素。与钴相比，只有铅、镉和铜在工业活动中被大量使用。
香蒲可作为研究溪流健康状况的指示物，尽管重金属的吸收受到沉积物和水参数的影响，但重金属并未被积累。研究河流的碱性在香蒲对镉和铜的生物修复过程中起到了抑制作用。叶片吸收了铅，水参数也影响了铅的吸收，但叶片中铅的浓度不足以将该物种用于尼科利纳河的铅生物修复过程。
