Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran.
Department of Environmental Science and Engineering, Waste and Wastewater Research Center, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran.
Bull Environ Contam Toxicol. 2023 Oct 31;111(5):65. doi: 10.1007/s00128-023-03823-4.
This study was conducted to analyze Cu, Fe, and Pb contamination in sediments and also phytoremediation ability of bulrush (Typha Latifolia) and one-rowed water-cress (Nasturtium microphyllum) along the Jajrood River, Iran in 2022. In so doing, a total of 60 sediment and macrophyte samples were collected from four sites. The contents of the analyzed elements were determined using inductively coupled plasma-optical emission spectroscopy (ICP-OES). Also, the values of pollution index (PI), pollution load index (PLI), bioconcentration factor (BCF), bioaccumulation factor (BAF), transfer factor (TF) and metal accumulation index (MAI) were calculated. The results demonstrated that the average contents of Cu, Fe, and Pb were lower than those in the background, which presumably demonstrated natural sources of these metals. The greatest concentrations of analyzed elements for all the sediment and macrophyte samples were observed in specimens collected from S4 located at the end of the river, indicating the impact of anthropogenic entries from upstream areas on elemental accumulation in downstream section of the river. The values of PI reflected slight contamination. The higher BCF and lower translocation TF values of Fe and Pb in T. Latifolia and also Cu in N. microphyllum imply that these species could be suitable for their phytostabilization of above-mentioned elements from the sediment. This study provides evidenceas to the efficiency of T. Latifolia and N. microphyllum in bioremediation of Cu, Fe, and Pb in contaminated aquatic environments.
本研究于 2022 年分析了伊朗 Jajrood 河流域沉积物中的铜、铁和铅污染情况，以及香蒲（Typha Latifolia）和豆瓣菜（Nasturtium microphyllum）的植物修复能力。为此，从四个地点共采集了 60 个沉积物和大型植物样本。使用电感耦合等离子体-光学发射光谱法（ICP-OES）测定了分析元素的含量。此外，还计算了污染指数（PI）、污染负荷指数（PLI）、生物浓缩系数（BCF）、生物积累系数（BAF）、转移系数（TF）和金属积累指数（MAI）的值。结果表明，铜、铁和铅的平均含量低于背景值，这可能表明这些金属的来源是自然的。对于所有沉积物和大型植物样本，分析元素的最高浓度出现在位于河流末端的 S4 处采集的样本中，这表明上游地区人为活动的影响导致了河流下游段元素的积累。PI 值反映了轻微的污染。香蒲中铁和铅的较高 BCF 和较低 TF 值，以及豆瓣菜中铜的较高 BCF 和较低 TF 值，表明这些物种可能适合将上述元素从沉积物中固定下来。本研究为香蒲和豆瓣菜在受污染水生环境中对 Cu、Fe 和 Pb 的生物修复效率提供了证据。
