Escuela Superior de Ingeniería y Arquitectura (ESIA), Unidad Ticoman, Instituto Politécnico Nacional (IPN), Calz. Ticomán 600, Delg. Gustavo A. Madero, C.P. 07340, Ciudad de México (CDMX), Mexico.
Tecnológico Nacional de México, Campus Comalcalco, Paraíso-Comalcalco km 2, RA. Occidente 3era, Sección. CP. 86650, Comalcalco, Tabasco, Mexico.
Chemosphere. 2023 Aug;332:138898. doi: 10.1016/j.chemosphere.2023.138898. Epub 2023 May 9.
Polycyclic aromatic hydrocarbons (PAHs) were assessed in sediments (n = 7) collected from the mouth of the Balsas River, Pacific Coast, Mexico. The total PAH levels ranged between 142.1 and 3944.07 μg kg in the summer and 137.65-3967.38 μg kg in the winter, probably reflecting the anthropogenic activities of the region. Calculation of the four analytical ratios of [Anthracene/(Anthracene + Phenanthrene)]: [Fluoranthene/(Fluoranthene + Pyrene)], [Fluoranthene/Pyrene: Fluoranthene/(Fluoranthene + Pyrene)], [Indeno [123-cd]Pyrene/(Indeno [123-cd]Pyrene + Benzo [ghi]Perylene)]: [Benzo [a]anthracene/(Benzo [a]Anthracene + Chrysene)], and [Anthracene/Phenanthrene]: [Fluoranthene/(Fluoranthene + Pyrene)] revealed a mixed PAH source, from petroleum and biomass combustion. Significant statistical correlations (r = 0.90) between the 4 and 5 ringed PAHs denote that adsorption is the principal mechanism for accumulation in sedimentary archives. Ecotoxicological indices (Mean Effect Range Medium Quotient and Mean Probable Effect Level Quotient) indicated moderate pollution with adverse biological impacts on ambient benthonic organisms. The calculations of Toxicity Equivalent Quotient and Mutagen Equivalent Quotient values proposed that the region is highly polluted by mutagenic and carcinogenic PAH compounds. The genotoxic evaluation of Lutjanus guttatus (Spotted rose snapper) presented significant DNA damage and discrepancies in Ethoxyresorufin-O-Deethylase activity. Based on the toxicological and genotoxicological evaluation of PAHs in sediments, the region was observed to be largely impacted from biological damage.
多环芳烃 (PAHs) 在墨西哥太平洋沿岸巴尔萨斯河口采集的沉积物 (n = 7) 中进行了评估。夏季总多环芳烃含量在 142.1 至 3944.07 μg kg 之间，冬季在 137.65 至 3967.38 μg kg 之间，这可能反映了该地区的人为活动。计算了 [荧蒽/(荧蒽+菲)]、[芴/(芴+芘)]、[茚并[123-cd]芘/(茚并[123-cd]芘+苯并[ghi]苝)]、[苯并[a]蒽/(苯并[a]蒽+屈)]和 [荧蒽/菲]:[芴/(芴+芘)]这四个分析比值，揭示了混合来源的多环芳烃，来自石油和生物质燃烧。四环和五环多环芳烃之间存在显著的统计相关性 (r = 0.90)，表明吸附是在沉积档案中积累的主要机制。生态毒理学指数（平均效应范围中值比率和平均可能效应水平比率）表明，该地区存在中度污染，对周围底栖生物具有不利的生物影响。毒性等效系数和致突变等效系数值的计算表明，该地区受到致突变和致癌多环芳烃化合物的高度污染。Lutjanus guttatus（斑点玫瑰笛鲷）的遗传毒性评估显示出显著的 DNA 损伤和 Ethoxyresorufin-O-Deethylase 活性的差异。根据沉积物中多环芳烃的毒理学和遗传毒性评估，该地区受到了严重的生物损伤。
