<?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>1405-3322</journal-id>
<journal-title><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Soc. Geol. Mex]]></abbrev-journal-title>
<issn>1405-3322</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Geológica Mexicana A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-33222022000100103</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2022v74n1a060821</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Parámetros magnéticos y concentración de metales pesados en polvo urbano de la Ciudad de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Magnetic parameters and concentration of heavy metals in urban dust of Mexico City]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cejudo]]></surname>
<given-names><![CDATA[Rubén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bautista]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Goguitchaichvili]]></surname>
<given-names><![CDATA[Avto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cervantes-Solano]]></surname>
<given-names><![CDATA[Miguel A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geofísica Laboratorio Universitario de Geofísica Ambiental]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México  ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Escuela Nacional de Estudio Superiores ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>74</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222022000100103&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222022000100103&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222022000100103&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En el presente trabajo se exhiben los resultados de un análisis combinado: magnético y geoquímico, para identificar la relación entre los parámetros magnéticos, la concentración de elementos mayores y los metales pesados en el polvo urbano de Ciudad de México. Se proponen modelos matemáticos que pueden, bajo ciertas circunstancias, estimar la concentración de elementos en el polvo urbano por medio de parámetros magnéticos, así como establecer el grado de precisión de cada modelo. También se proponen valores de umbrales magnéticos para identificar muestras con baja, media y alta concentración de elementos. Los resultados indican que el polvo urbano de la Ciudad de México tiene una concentración variada de minerales esencialmente ferrimagnéticos y partículas superparamagnéticas. La concentración de los elementos en las muestras de polvo urbano fueron: Al entre 3,325 a 27,336 mg kg-1; Cr entre 17 a 117 mg kg-1; Cu entre 15 a 405 mg kg-1; Fe entre 653 a 39,217 mg kg-1; Ni entre 21 a 66 mg kg-1; Pb entre 27 a 366 mg kg-1; V entre 11 a 52 mg kg-1 y Zn entre 102 a 537 mg kg-1. La relación entre los parámetros magnéticos y la concentración de elementos resultaron de tipo lineal, con coeficientes de correlación de Pearson positivos entre 0.26 a 0.69. Los valores umbrales magnéticos propuestos para identificar sitios con problemas de acumulación de elementos (Cr, Cu, Ni, Pb y Zn) en polvo urbano para la Ciudad de México, para susceptibilidad específica son: Baja &lt; 2.86 µm3 kg-1; Moderada: 2.86 a 3.46 µm3 kg-1 y Alta &gt; 3.46 µm3 kg-1. Para la magnetización remanente isotermal de saturación: Baja &lt; 38 mAm2 kg-1; Moderada: entre 38 a 46 mAm2 kg-1 y Alta &gt; 46 mAm2 kg-1. Los modelos matemáticos para estimar la concentración de elementos tuvieron una efectividad del 60%.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT A combined magnetic and geochemical analysis was carried out to identify the relationship between magnetic parameters, concentration of major elements and heavy metals in urban dust of Mexico City. Here, we propose simple mathematical models that can estimate the concentration of elements in urban dust by means of magnetic parameters, as well as establish the degree of precision of each model. Magnetic threshold values are also proposed to identify samples with low, medium and high concentrations of elements. Urban dust from Mexico City showed a different concentration of essentially ferrimagnetic minerals and superparamagnetic particles. The concentration of the elements in the urban dust samples were: Al between 3,325 to 27,336 mg kg-1; Cr between 17 to 117 mg kg-1; Cu between 15 to 405 mg kg-1; Fe between 653 to 39,217 mg kg-1; Ni between 21 to 66 mg kg- 1; Pb between 27 to 366 mg kg-1; V between 11 to 52 mg kg-1 and Zn between 102 to 537 mg kg-1. The relationship between magnetic parameters and concentration of element is rather linear, showing positive Pearson correlation coefficients with values between 0.26 to 0.69. Magnetic threshold values were proposed to identify sites with relatively high accumulation of Cr, Cu, Ni, Pb and Zn. These values for specific magnetic susceptibility are: Low &lt; 2.86 µm3 kg-1; Moderate: 2.86 to 3.46 µm3 kg-1 and High &gt; 3.46 µm3 kg-1; and for remanent isothermal magnetization of saturation: Low &lt; 38 mAm2 kg-1; Moderate: between 38 to 46 mAm2 kg-1 and High &gt; 46 mAm2 kg-1. Mathematical models to estimate the concentration of elements showed effectiveness of about 60%.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Contaminación]]></kwd>
<kwd lng="es"><![CDATA[Ciudad de México]]></kwd>
<kwd lng="es"><![CDATA[propiedades magnéticas]]></kwd>
<kwd lng="es"><![CDATA[elementos mayores]]></kwd>
<kwd lng="es"><![CDATA[metales pesados]]></kwd>
<kwd lng="en"><![CDATA[Pollution]]></kwd>
<kwd lng="en"><![CDATA[Mexico City]]></kwd>
<kwd lng="en"><![CDATA[Magnetic properties]]></kwd>
<kwd lng="en"><![CDATA[major elements]]></kwd>
<kwd lng="en"><![CDATA[heavy metals]]></kwd>
</kwd-group>
</article-meta>
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