<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2176-6223</journal-id>
<journal-title><![CDATA[Revista Pan-Amazônica de Saúde]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Pan-Amaz Saude]]></abbrev-journal-title>
<issn>2176-6223</issn>
<publisher>
<publisher-name><![CDATA[Instituto Evandro Chagas. Secretaria de Vigilância em Saúde e Ambiente. Ministério da Saúde]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2176-62232025000110111</article-id>
<article-id pub-id-type="doi">10.5123/s2176-6223202501768</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Tendências sazonais e integração multivariada de indicadores hidroquímicos no rio Maguari-Açu]]></article-title>
<article-title xml:lang="en"><![CDATA[Seasonal trends and multivariate integration of hydrochemical indicators in the Maguari-Açu River]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vasconcelos Junior]]></surname>
<given-names><![CDATA[Neuton Trindade]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Yasmim Oliveira dos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Mônia Maria Carvalho da]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Faial]]></surname>
<given-names><![CDATA[Kleber Raimundo Freitas]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sousa]]></surname>
<given-names><![CDATA[Eliane Brabo de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Faial]]></surname>
<given-names><![CDATA[Kelson do Carmo Freitas]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Evandro Chagas Seção de Meio Ambiente Laboratório de Geoquímica e Saúde]]></institution>
<addr-line><![CDATA[Ananindeua Pará]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade do Estado do Pará Centro de Ciências Naturais e de Tecnologia Faculdade de Engenharia Ambiental e Sanitária]]></institution>
<addr-line><![CDATA[Belém Pará]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Evandro Chagas Seção de Meio Ambiente Laboratório de Química Ambiental e Saúde]]></institution>
<addr-line><![CDATA[Ananindeua Pará]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Evandro Chagas Seção de Meio Ambiente Laboratório de Cianobactérias e Bioindicadores Aquáticos]]></institution>
<addr-line><![CDATA[Ananindeua Pará]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>16</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_arttext&amp;pid=S2176-62232025000110111&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_abstract&amp;pid=S2176-62232025000110111&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_pdf&amp;pid=S2176-62232025000110111&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO  OBJETIVO:  Investigar a variação espaço-temporal e as correlações multivariadas entre indicadores hidroquímicos na bacia do rio Maguari-Açu, na Região Metropolitana de Belém, Estado do Pará, Brasil.  MATERIAIS E MÉTODOS:  Foram realizadas seis campanhas de amostragem em 11 pontos ao longo do ciclo hidrológico. As análises incluíram parâmetros físico-químicos in situ e quantificação de metais por espectrometria de emissão óptica com plasma acoplado indutivamente. Aplicaram-se análise de componentes principais e agrupamento hierárquico.  RESULTADOS:  Os dados revelaram ampla variabilidade nos parâmetros analisados, influenciada por fatores sazonais e pressões antrópicas, como lançamento de esgotos e uso desordenado do solo. As análises multivariadas identificaram três agrupamentos principais relacionados à salinização, à dinâmica redox e à presença de atividades humanas.  CONCLUSÃO:  A qualidade da água na bacia do rio Maguari-Açu encontra-se comprometida em diversos trechos, especialmente devido às interferências antrópicas e à sazonalidade climática. Os resultados evidenciam potenciais impactos sobre a saúde ambiental e a população local, reforçando a necessidade de monitoramento contínuo, intervenções de gestão e políticas públicas voltadas à segurança hídrica. Este estudo fornece subsídios técnicos para a mitigação de impactos ambientais e conservação de ecossistemas aquáticos, especialmente no contexto das mudanças climáticas e da realização da COP30 em Belém.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  OBJECTIVE:  To investigate the spatiotemporal variation and multivariate correlations among hydrochemical indicators in the Maguari-Açu River basin, located in the Metropolitan Region of Belém, Pará State, Brazil.  MATERIALS AND METHODS:  Six sampling campaigns were carried out at 11 sites throughout the hydrological cycle. Analyses included in situ physicochemical parameters and quantification of metals by inductively coupled plasma optical emission spectrometry. Principal component analysis and hierarchical cluster analysis were applied.  RESULTS:  The data revealed wide variability in the analyzed parameters, influenced by seasonal factors and anthropogenic pressures such as sewage discharge and unregulated land use. Multivariate analyses identified three main clusters related to salinization, redox dynamics, and human activities.  CONCLUSION:  Water quality in the Maguari-Açu River basin is compromised in several stretches, mainly due to anthropogenic interference and climatic seasonality. The results highlight potential impacts on environmental health and the local population, emphasizing the need for continuous monitoring, management interventions, and public policies aimed at ensuring water security. This study provides technical evidence to support mitigation of environmental impacts and conservation of aquatic ecosystems, particularly in the context of climate change and the upcoming COP30 in Belém.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Qualidade da Água]]></kwd>
<kwd lng="pt"><![CDATA[Metais Pesados]]></kwd>
<kwd lng="pt"><![CDATA[Análise Multivariada]]></kwd>
<kwd lng="pt"><![CDATA[Saúde Ambiental]]></kwd>
<kwd lng="pt"><![CDATA[Ecossistema Amazônico]]></kwd>
<kwd lng="en"><![CDATA[Water Quality]]></kwd>
<kwd lng="en"><![CDATA[Metals, Heavy]]></kwd>
<kwd lng="en"><![CDATA[Multivariate Analysis]]></kwd>
<kwd lng="en"><![CDATA[Environmental Health]]></kwd>
<kwd lng="en"><![CDATA[Amazonian Ecosystem]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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