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<p>Potentially toxic elements (PTEs) are characterized by their high toxicity, persistence, and limited degradability, which pose a potential threat to aquatic ecosystems such as lakes. In this study, the concentrations and spatial distributions of total and soluble PTEs including copper (Cu), nickel (Ni), chromium (Cr), cadmium (Cd), zinc (Zn), manganese (Mn), and iron (Fe) were analyzed in the sediments of a Mexican lake to estimate the ecological risk and to evaluate the phytoremediation capacity of cattail plants (<i>T. domingensis</i>); for this purpose, textural, mineralogical, and geochemical analyses were carried out on the sediments and plants. The ecological risk indices, including the contamination factor (CF), enrichment factor (EF), and potential ecological risk index (PERI), evaluated for the sediment showed low to moderate contamination levels derived from anthropogenic activities. The potential ecological risk results indicated a high ecological risk (41 to 483) in almost all samples due to elevated cadmium concentrations. The cattail plants present in the lake demonstrated a high PTE accumulation capacity, with the roots accumulating a greater proportion of these toxic elements than the leaves. These results demonstrate that cattail plants have potential for use as phytoremediators and may contribute to reducing PTE concentrations in the lake.</p>

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Evaluation of the ecological risk and the effect of cattails (Typha dominguensis Pers.) on the concentration of potentially toxic elements (PTEs) in tropical lake sediments. A case study from Southern Mexico

  • 期刊论文

  • 发表日期：

    2026年4月25日

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  • José Alfredo Flores-Ronces,
  • Edith R. Salcedo Sánchez,
  • María Vicenta Esteller Alberich,
  • Juan Manuel Esquivel Martínez,
  • Jesús G. Padilla-Serrato,
  • Alfredo Méndez-Bahena,
  • Carmina Torreblanca-Ramírez

摘要

Potentially toxic elements (PTEs) are characterized by their high toxicity, persistence, and limited degradability, which pose a potential threat to aquatic ecosystems such as lakes. In this study, the concentrations and spatial distributions of total and soluble PTEs including copper (Cu), nickel (Ni), chromium (Cr), cadmium (Cd), zinc (Zn), manganese (Mn), and iron (Fe) were analyzed in the sediments of a Mexican lake to estimate the ecological risk and to evaluate the phytoremediation capacity of cattail plants (T. domingensis); for this purpose, textural, mineralogical, and geochemical analyses were carried out on the sediments and plants. The ecological risk indices, including the contamination factor (CF), enrichment factor (EF), and potential ecological risk index (PERI), evaluated for the sediment showed low to moderate contamination levels derived from anthropogenic activities. The potential ecological risk results indicated a high ecological risk (41 to 483) in almost all samples due to elevated cadmium concentrations. The cattail plants present in the lake demonstrated a high PTE accumulation capacity, with the roots accumulating a greater proportion of these toxic elements than the leaves. These results demonstrate that cattail plants have potential for use as phytoremediators and may contribute to reducing PTE concentrations in the lake.