<?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>0871-018X</journal-id>
<journal-title><![CDATA[Revista de Ciências Agrárias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. de Ciências Agrárias]]></abbrev-journal-title>
<issn>0871-018X</issn>
<publisher>
<publisher-name><![CDATA[Sociedade de Ciências Agrárias de Portugal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0871-018X2022000301221</article-id>
<article-id pub-id-type="doi">10.19084/rca.28862</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Extractabilidad de metales pesados en suelos urbanos]]></article-title>
<article-title xml:lang="en"><![CDATA[Extractability of trace metals in urban soils]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Roo]]></surname>
<given-names><![CDATA[María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herbón]]></surname>
<given-names><![CDATA[Cecilia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martín]]></surname>
<given-names><![CDATA[Juan Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barral]]></surname>
<given-names><![CDATA[María Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paradelo]]></surname>
<given-names><![CDATA[Remigio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Santiago de Compostela Departamento de Edafoloxía e Química Agrícola ]]></institution>
<addr-line><![CDATA[Santiago de Compostela ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Complutense de Madrid Departamento de Química en Ciencias Farmacéuticas ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>45</volume>
<numero>4</numero>
<fpage>1221</fpage>
<lpage>1230</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2022000301221&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2022000301221&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2022000301221&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El aumento de la urbanización y la industrialización pueden afectar negativamente a las funciones de los suelos urbanos. Entre los problemas más desafiantes se encuentra la acumulación de contaminantes derivados de las actividades humanas, como los metales pesados. No es suficiente conocer las concentraciones totales de estos contaminantes en los suelos, sino que es necesario evaluar su extractabilidad para simular qué concentración está disponible para las plantas y que podría suponer un riesgo al introducirse en la cadena alimentaria. En este trabajo se ha evaluado la biodisponibilidad de cinco metales pesados (Pb, Cu, Zn, Ni y Cr) en 55 suelos de la ciudad de Santiago de Compostela dedicados a distintos usos del suelo (vegetación herbácea, forestal y agrícola) y desarrollados sobre diferentes litologías. Los metales solubles se evaluaron con una extracción CaCl2 0,01M en la que solo el Zn aparece en forma soluble en cantidades significativas. Los metales disponibles para plantas, evaluados con una extracción en AEDT, siguieron una secuencia de concentraciones decreciente Pb &gt; Zn &gt; Cu &gt; Ni &gt; Cr. Las concentraciones de Zn y Cu más altas aparecen en suelos de uso agrícola, situados principalmente sobre gneis, lo que explica también la relación encontrada entre la concentración de Cu y este tipo de litología.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Urbanization and industrialization may have negative effects in urban soils functions. One of the most challenging problems is the accumulation of pollutants coming from the anthropogenic activities, such as heavy metals. It is not enough to analyse the total concentrations of this pollutants, but we need to evaluate their bioavailability and determine which concentration could enter to the food chain through plant uptake. In this study we analysed the bioavailability of five heavy metals (Pb, Cu, Zn, Ni and Cr) in 55 soils of Santiago de Compostela with different land uses (grassland, forest and agricultural) and different lithologies. Soluble metals were evaluated using an extraction with 0.01M CaCl2, in which only soluble Zn appears in a significant amount. Bioavailability of exchangeable metals, evaluated using an EDTA extraction, followed a decreasing trend Pb &gt; Zn &gt; Cu &gt; Ni &gt; Cr. Moreover, we found that higher concentrations of Zn and Cu correspond to agricultural soils, developed most over gneiss, which explains the significant relation between Cu concentrations and gneiss lithology.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biodisponibilidad]]></kwd>
<kwd lng="es"><![CDATA[metales pesados]]></kwd>
<kwd lng="es"><![CDATA[extracción en AEDT]]></kwd>
<kwd lng="es"><![CDATA[extracción en CaCl2]]></kwd>
<kwd lng="en"><![CDATA[bioavailability]]></kwd>
<kwd lng="en"><![CDATA[heavy metals]]></kwd>
<kwd lng="en"><![CDATA[extraction with EDTA]]></kwd>
<kwd lng="en"><![CDATA[extraction with CaCl2]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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