National Institute for Research and Development on Marine Geology and Geoecology (GeoEcoMar), 23-25 Dimitrie Onciul, 024053, Bucharest, Romania.
Chemical and Biochemical Engineering Department, University Politehnica of Bucharest, 1-3 Gheorghe Polizu, 011061, Bucharest, Romania.
Environ Monit Assess. 2020 Nov 5;192(12):749. doi: 10.1007/s10661-020-08698-0.
Forty-three surface sediment samples were collected in September 2019 from Tasaul Lake (Black Sea coast, Romania) to examine the metal distribution patterns, assess the level of metal contamination, and identify the pollutant sources. The determined mean metal concentrations were as follows: Al 49,772 mg/kg, Zn 84.40 mg/kg, Cr 83.70 mg/kg, V 76.45 mg/kg, Ni 42.53 mg/kg, Cu 34.27 mg/kg, Pb 26.30 mg/kg, As 12.49 mg/kg, and Hg 0.06 mg/kg. The metals in the surface sediments of Tasaul Lake displayed moderate spatial variation, with higher metal concentrations mainly occurring in the south and southeast (As, Pb, and Hg), southwest (Cu and Zn), and west of the lake (Cr, Ni, and V). Heavy metal contamination in sediments is assessed using pollution indices such as enrichment factor, contamination factor, and pollution load index. The highest CFs and EFs were determined for As (moderate to high pollution), followed by Pb (low to moderate pollution). The Cu, Zn, and Hg pollution indices showed values corresponding to low pollution levels, while Ni, Cr, and V presented the lowest indices, suggesting unpolluted sediments. Multivariate statistical analyses were performed to identify the origin of the analyzed heavy metals. Cr was predominantly sourced from lithogenic components, Ni and V originated from both natural and anthropogenic sources, and As, Cu, Zn, Pb, and Hg showed mainly anthropogenic sources such as agricultural runoff, domestic and industrial wastewater discharges, and quarrying activities.
2019 年 9 月，从罗马尼亚黑海沿岸的塔苏尔湖采集了 43 个表层沉积物样本，以研究金属的分布模式、评估金属污染程度并识别污染源。测定的金属平均浓度如下：Al 49772mg/kg、Zn 84.40mg/kg、Cr 83.70mg/kg、V 76.45mg/kg、Ni 42.53mg/kg、Cu 34.27mg/kg、Pb 26.30mg/kg、As 12.49mg/kg 和 Hg 0.06mg/kg。塔苏尔湖表层沉积物中的金属具有中等的空间变异性，较高的金属浓度主要分布在南部和东南部（As、Pb 和 Hg）、西南部（Cu 和 Zn）和湖的西部（Cr、Ni 和 V）。使用富集因子、污染因子和污染负荷指数等污染指数评估沉积物中的重金属污染情况。As 的 CFs 和 EFs 最高（中至高污染），其次是 Pb（低至中污染）。Cu、Zn 和 Hg 的污染指数表明处于低污染水平，而 Ni、Cr 和 V 的污染指数最低，表明沉积物未受污染。进行了多元统计分析以确定分析重金属的来源。Cr 主要来源于岩石成分，Ni 和 V 来源于自然和人为来源，而 As、Cu、Zn、Pb 和 Hg 主要来源于农业径流、生活和工业废水排放以及采石活动等人为来源。
