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<p>The Capibaribe River in Northeast Brazil is affected by water quality degradation driven by population growth and industrial activities. Seventeen water samples were analyzed for physicochemical parameters, major ions, radium isotopes, and the results were compared with Brazilian and WHO standards. Most samples showed elevated electrical conductivity, salinity, and chloride, indicating strong mineralization influenced by evaporation and human activities. Activity concentrations of <sup>226</sup>Ra and <sup>228</sup>Ra were mostly within permissible limits. Hydrochemical facies revealed Ca–HCO<sub>3</sub> and Cl–SO<sub>4</sub> water types. The study highlights the effect of natural processes and human activities on water quality, providing crucial insights for water management.</p>

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Hydrogeochemical and radium isotope characterization of the Capibaribe River’s water quality in Northeast Brazil

  • 期刊论文

  • 发表日期：

    2026年1月29日

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  • Taiwo Saheed Yinusa,
  • José Araújo dos Santos Júnior,
  • Zahily Herrero Fernández,
  • Romilton dos Santos Amaral,
  • Robert Fernandes de Melo,
  • Josineide Marques do Nascimento Santos,
  • Mariana Brayner Cavalcanti Freire Bezerra,
  • Artur Paiva Coutinho,
  • Marvic Ortueta Milan,
  • Lino Angel Valcarcel Rojas,
  • Jussiê Soares da Rocha,
  • João Tadeu da Silva Santana,
  • Yasmin Marques dos Santos,
  • Rafaela Kelly Constantino Ferreira,
  • João Marcos de Freitas Santos Silva,
  • Guilherme Ramos de Mendonça

摘要

The Capibaribe River in Northeast Brazil is affected by water quality degradation driven by population growth and industrial activities. Seventeen water samples were analyzed for physicochemical parameters, major ions, radium isotopes, and the results were compared with Brazilian and WHO standards. Most samples showed elevated electrical conductivity, salinity, and chloride, indicating strong mineralization influenced by evaporation and human activities. Activity concentrations of 226Ra and 228Ra were mostly within permissible limits. Hydrochemical facies revealed Ca–HCO3 and Cl–SO4 water types. The study highlights the effect of natural processes and human activities on water quality, providing crucial insights for water management.