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Biomonitoring of Mercury, Cadmium and Selenium in Fish and the Population of Puerto Nariño, at the Southern Corner of the Colombian Amazon
Archives of Environmental Contamination and Toxicology ( IF 4 ) Pub Date : 2020-10-07 , DOI: 10.1007/s00244-020-00761-8
Maria Alcala-Orozco , Karina Caballero-Gallardo , Jesus Olivero-Verbel

Heavy metals threaten communities near biodiversity hotspots, as their protein sources come from the environment. This study assessed Hg, Cd, and Se concentrations in fish, as well as the magnitude of exposure and hematological conditions of adult citizens from Puerto Nariño (Colombian Amazon). Among fish samples, greater Hg concentrations were found in higher trophic level species, including Rhaphiodon vulpinus (880 ± 130 ng/g) and Pseudoplatystoma tigrinum (920 ± 87 ng/g). These species presented the highest hazard quotients and lowest Se:Hg molar ratios among those studied, showing their consumption represents a health risk to consumers. Moreover, some samples of Mylossoma duriventre and Prochilodus magdalenae had Cd levels greater than the regulated limit (100 ng/g). The average total Hg (T-Hg) concentrations in human hair and blood were 5.31 µg/g and 13.7 µg/L, respectively. All hair samples exceeded the 1.0 μg/g threshold set by the USEPA, whereas 93% of the volunteers had T-Hg blood levels greater than 5 μg/L, suggesting elevated exposure. The mean Cd level was 3.1 µg/L, with 21% of samples surpassing 5 µg/L, value at which mitigating actions should be taken. Eighty-four percent of participants presented Se deficiencies (<100 μg/L). There was a significant association between fish consumption and T-Hg in hair (ρ = 0.323; p = 0.032) and blood (ρ = 0.381; p = 0.011). In this last matrix, Se correlated with Cd content, whereas lymphocytes were inversely linked to Hg concentrations. The results of this study show that there is extensive exposure to Hg in fish, the consumption of which may promote detrimental impacts on hematology parameters within the community.



中文翻译:

在哥伦比亚亚马逊河南角的鱼类和纳里尼奥港人口中的汞,镉和硒的生物监测

重金属威胁着生物多样性热点附近的社区,因为它们的蛋白质来源来自环境。这项研究评估了鱼类的汞,镉和硒浓度,以及纳里尼奥港(哥伦比亚亚马逊河)成年公民的暴露程度和血液学状况。在鱼类样品中,在较高营养级别的物种中发现了较高的汞含量,其中包括Rhaphiodon vulpinus(880±130 ng / g)和Pseudoplatystoma tigrinum(920±87 ng / g)。在所研究的物种中,这些物种呈现出最高的危险商和最低的Se:Hg摩尔比,表明它们的食用对消费者构成健康风险。此外,杜鹃花Mylossomamagdalenae的一些样本 镉含量超过规定的限值(100 ng / g)。人发和血液中的平均总Hg(T-Hg)浓度分别为5.31 µg / g和13.7 µg / L。所有头发样本均超过了USEPA设定的1.0μg/ g阈值,而93%的志愿者的T-Hg血液水平高于5μg/ L,表明暴露水平升高。镉的平均含量为3.1 µg / L,其中21%的样品超过5 µg / L,应采取缓解措施。84%的参与者表示硒缺乏(<100μg/ L)。鱼的摄入量与头发中的T-Hg(ρ  = 0.323; p  = 0.032)和血液(ρ  = 0.381; p = 0.011)。在最后一个矩阵中,硒与镉含量相关,而淋巴细胞与汞浓度成反比。这项研究的结果表明,鱼类中汞的暴露量很大,其摄入可能会加剧对社区内血液学参数的有害影响。

更新日期:2020-10-07
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