Scholarlink

<p>The Santo Antônio River, a surface watercourse forming part of the Brazil-Argentina border, is a tributary of the Lower Iguaçu River, region that houses the biodiverse Iguaçu National Park. This study aimed to assess its impact on the Iguaçu River’s water quality. Samples were collected at 10 points: eight along the Santo Antônio River (P1 to P8), from source to mouth, and two in the Iguaçu River, upstream (P9) and downstream (P10) of the Santo Antônio’s mouth. Physicochemical analyses revealed turbidity above the limit in P6, P7, P8, and P10 and higher than allowed biochemical oxygen demand (BOD) at all points. The hormone estriol (E3) was detected in all samples (10.50 to 30.54&#xa0;μg.L⁻<sup>1</sup>), while 17β-estradiol (E2) was detected only in P2. The herbicide 2,4-D exceeded the limits in P3, P6, P7, P8, and P9. High concentrations of aluminum and iron were found in P8, with manganese above the limit in P8 and P10. In the sediments, high concentrations of chromium, nickel, and copper were confirmed at several points. Ecotoxicological tests with <i>Artemia salina</i> indicated high mortality in several points. <i>Lithobates catesbeianus</i> and <i>Allium cepa</i> showed cytotoxicity and mutagenicity at multiple points, while <i>Eisenia fetida</i> and <i>Lactuca sativa</i> did not present significant toxicity. Human liver cells (HuH7.5) had proliferation in P1, P2, and P8, while P9 and P10 showed cytotoxicity. The results show that the Santo Antônio River contributed to the degradation of water quality in the Iguaçu River, especially in terms of turbidity, BOD, hormones, metals, and ecotoxicity for <i>A. salina.</i></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Physicochemical parameters, levels of 2,4-D, estrogen hormones, and metals in Santo Antônio River (Brazil-Argentina): ecotoxicity and effect on water quality of the Iguaçu National Park

  • 期刊论文

  • 发表日期：

    2025年10月1日

查看全文
  • Anna Karolina Gomes de Oliveira,
  • Cassiano Aparecido de Souza,
  • Emanuel do Vale Silva,
  • Clisley Marielly Ribeiro Lameira,
  • Patricia Aline Bressiani,
  • Pedro Elias Manosso,
  • Isabella Cristina Dall’Oglio,
  • Fernando Rodolfo Espinoza-Quiñones,
  • Ana Paula de Oliveira Schmitz,
  • Juan Carlos Pokrywiecki,
  • Ticiane Sauer Pokrywiecki,
  • Fernando César Manosso,
  • Eduardo Michel Vieira Gomes,
  • Rodrigo Lingnau,
  • Franciele Aní Caovilla Follador,
  • Gisele Arruda,
  • Alessandro Samuel-Rosa,
  • Elisângela Düsman

摘要

The Santo Antônio River, a surface watercourse forming part of the Brazil-Argentina border, is a tributary of the Lower Iguaçu River, region that houses the biodiverse Iguaçu National Park. This study aimed to assess its impact on the Iguaçu River’s water quality. Samples were collected at 10 points: eight along the Santo Antônio River (P1 to P8), from source to mouth, and two in the Iguaçu River, upstream (P9) and downstream (P10) of the Santo Antônio’s mouth. Physicochemical analyses revealed turbidity above the limit in P6, P7, P8, and P10 and higher than allowed biochemical oxygen demand (BOD) at all points. The hormone estriol (E3) was detected in all samples (10.50 to 30.54 μg.L⁻1), while 17β-estradiol (E2) was detected only in P2. The herbicide 2,4-D exceeded the limits in P3, P6, P7, P8, and P9. High concentrations of aluminum and iron were found in P8, with manganese above the limit in P8 and P10. In the sediments, high concentrations of chromium, nickel, and copper were confirmed at several points. Ecotoxicological tests with Artemia salina indicated high mortality in several points. Lithobates catesbeianus and Allium cepa showed cytotoxicity and mutagenicity at multiple points, while Eisenia fetida and Lactuca sativa did not present significant toxicity. Human liver cells (HuH7.5) had proliferation in P1, P2, and P8, while P9 and P10 showed cytotoxicity. The results show that the Santo Antônio River contributed to the degradation of water quality in the Iguaçu River, especially in terms of turbidity, BOD, hormones, metals, and ecotoxicity for A. salina.