Abstract：
The aim of this study was to investigate the status of trace metals (As, Cr, Cu, Ni, Pb, Fe, and Zn) and health and carcinogenic risk associated then in the Ebolowa Municipal Lake (EML) basin. To this end, 21 water samples were collected from the EML and its two tributaries, Mfoumou and Bengo\'o, and analyzed by Quantofix method (nanocolors and visiocolor ECO) by using the MACHEREY-NAGEL photometer. The data were processed using multivariate statistics. The results showed that all the physicochemical parameters (pH, EC, and TDS), with the exception of TDS, comply with were within WHO limits. The distribution of trace metals at the three sites investigated was as follows: Zn (80-400 ± 1.58 µg/L) > Cu (50-150 ± 9.38 µg/L) > Fe (10-40 ± 0.71 µg/L) > Pb (1-20 ± 3.02 µg/L) > As (1-9 ± 0.44 µg/L) > Ni (1-9 ± 1.48 µg/L). However, the highest values were observed in the EML and the Mfoumou River, where Pb pollution was noted. Statistical analysis showed that anthropogenic inputs increase the presence of Cr, Cu, Pb, and Zn. Trace Metal Pollution Index values were below 15 at all sites, illustrating low levels of pollution. The trace metal evaluation index values for the Bengo\'o stream are pure (mean = 0.6), slightly affected in the Mfoumou stream (mean = 2.0), and moderately affected in the EML (mean = 2.2). The toxicity load index values illustrate that the waters studied are toxic. The non-carcinogenic (HI) and carcinogenic (CR) health risk index values suggest a risk linked to oral ingestion in the LME and Mfoumou watercourses. The latter appears to be the main source of allochthonous pollutant input to the EML.
摘要：
这项研究的目的是调查痕量金属(As，Cr,Cu,Ni,Pb,Fe,和Zn）以及与Ebolowa市政湖（EML）盆地相关的健康和致癌风险。为此,从EML及其两个支流中收集了21个水样，Mfoumou和Bengo\'o,并使用MACHEREY-NAGEL光度计通过Quantofix方法（纳米颜色和可见颜色ECO）进行分析。使用多变量统计对数据进行处理。结果表明,所有的理化参数(pH,EC,和TDS），除了TDS,符合世卫组织的规定。研究的三个地点的痕量金属分布如下：Zn（80-400±1.58µg/L）>Cu（50-150±9.38µg/L）>Fe（10-40±0.71µg/L）>Pb（1-20±3.02µg/L）>As（1-9±0.44µg/L）>Ni（1-9±1.48µg/L）。然而,在EML和Mfoumou河中观察到最高值，注意到铅污染。统计分析表明，人为输入增加了Cr的存在，Cu,Pb,和Zn。所有地点的痕量金属污染指数值均低于15,说明低水平的污染。本戈流的痕量金属评估指数值是纯的(平均值=0.6)，在Mfoumou流中受到轻微影响(平均值=2.0)，在EML中受到中度影响（平均值=2.2）。毒性负荷指数值表明所研究的水是有毒的。非致癌（HI）和致癌（CR）健康风险指数值表明与LME和Mfoumou水道中的口服摄入有关的风险。后者似乎是输入EML的外来污染物的主要来源。
