<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992005000300115</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[NIVELES DE PLOMO, ZINC, CADMIO Y COBRE EN EL RIO ALMENDARES, CIUDAD HABANA, CUBA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lima Cazorla]]></surname>
<given-names><![CDATA[Lázaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olivares-Rieumont]]></surname>
<given-names><![CDATA[Susana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Columbie]]></surname>
<given-names><![CDATA[Isaida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosa Mederos]]></surname>
<given-names><![CDATA[Daniel de la]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gil Castillo]]></surname>
<given-names><![CDATA[Reinaldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Superior de Tecnologías y Ciencias Aplicadas Laboratorio de Análisis Ambiental ]]></institution>
<addr-line><![CDATA[Ciudad Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Protección e Higiene de las Radiaciones  ]]></institution>
<addr-line><![CDATA[Ciudad Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2005</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2005</year>
</pub-date>
<volume>21</volume>
<numero>3</numero>
<fpage>115</fpage>
<lpage>124</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992005000300115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992005000300115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992005000300115&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El objetivo de esta investigación fue determinar los niveles de Pb, Cu, Zn y Cd existentes en el Río Almendares (Ciudad de la Habana, Cuba), para ello se establecieron 15 estaciones de muestreo a lo largo del río y se realizaron los análisis de estos metales en los sedimentos y en la planta Eichhornia crassipes, durante la temporada de seca de 2003 y 2004. En los sedimentos del río se encontraron contenidos de Pb entre 38.7 y 217.5 mg/ kg, de Cd de &lt;1.0 a 4.8 mg/kg, de Cu entre 32.9 y 420.8 mg/kg y de Zn entre 69.9 y 708.8 mg/kg. Se analizaron también estos metales en la raíz de la macrófta Eichhornia crassipes, donde se detectaron niveles entre 7.0 y 143.0 mg/kg para Pb, &lt;1.0 y 3.9 mg/kg para Cd, de 45 a 466 mg/kg para Zn y entre 5.1 y 77.0 mg/kg para Cu, encontrándose que la distribución espacial de estos metales en la raíz de la planta fue similar a la hallada para los sedimentos en el río. De hecho, se obtuvieron correlaciones significativas (P&lt;0.05) entre los contenidos de Zn y Cu en los sedimentos y en la raíz de la planta.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The objective of this study was to assess the levels of Pb, Cu, Zn and Cd in Almendares River (Havana City, Cuba). Fifteen sampling stations were located along the river. The concentrations of these metals were determined in the sediments and the roots of Eichhornia crassipes during the dry season of 2003 and 2004. Concentrations of Pb between 38.7 and 217.5 mg/kg, of Cd between &lt;1.0 and 4.8 mg/kg, of Cu between 32.9 and 420.8 mg/kg, and of Zn between 69.9 and 708.8 mg/kg were found in river sediments. In the roots of the Eichhornia crassipes, a widespread macrophyte in the Almendares River, the concentrations of metals varied from 7.0 - 143.0 mg/g for Pb, &lt;1.0 - 3.9 mg/g for Cd, 45 -466 mg/g for Zn and 5.1 - 77.0 mg/g. Similar spatial distribution was established for the metals in the sediments and in the plant's roots. Significant correlations (P&lt;0.05) were found for Cu, and Zn contents in Eichhornia crassipes roots and in the sediments.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[plomo]]></kwd>
<kwd lng="es"><![CDATA[cobre]]></kwd>
<kwd lng="es"><![CDATA[cadmio y zinc]]></kwd>
<kwd lng="es"><![CDATA[contaminación ambiental]]></kwd>
<kwd lng="es"><![CDATA[Río Almendares]]></kwd>
<kwd lng="es"><![CDATA[sedimentos]]></kwd>
<kwd lng="es"><![CDATA[Eichhornia crassipes]]></kwd>
<kwd lng="en"><![CDATA[lead]]></kwd>
<kwd lng="en"><![CDATA[copper]]></kwd>
<kwd lng="en"><![CDATA[zinc]]></kwd>
<kwd lng="en"><![CDATA[cadmium]]></kwd>
<kwd lng="en"><![CDATA[pollution]]></kwd>
<kwd lng="en"><![CDATA[Almendares River]]></kwd>
<kwd lng="en"><![CDATA[sediments]]></kwd>
<kwd lng="en"><![CDATA[Eichhornia crassipes]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bighman]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bartels]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[D.L.]]></surname>
<given-names><![CDATA[Sparks]]></given-names>
</name>
</person-group>
<source><![CDATA[Methods of Soil Analysis, Part 3, Chemical methods]]></source>
<year>1996</year>
<page-range>1390</page-range><publisher-loc><![CDATA[Madison, WI ]]></publisher-loc>
<publisher-name><![CDATA[Soil Science Society of America]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bubb]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Lester]]></surname>
<given-names><![CDATA[J. N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Anthropogenic heavy metals inputs to Lowland River systems, a case study. The River Stour, U. K]]></article-title>
<source><![CDATA[Water, Air Soil Pollut.]]></source>
<year>1994</year>
<volume>78</volume>
<page-range>279-96</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campos]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Usero]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gracia]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Contaminación por metales en sedimentos del río Tinto]]></article-title>
<source><![CDATA[Tecnología del agua]]></source>
<year>1990</year>
<numero>2</numero>
<issue>2</issue>
<page-range>49-56</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<collab>CCAV</collab>
<source><![CDATA[Reporte Técnico sobre la Cuenca Almendares-Vento,]]></source>
<year>1999</year>
<page-range>54</page-range><publisher-loc><![CDATA[C. Habana ]]></publisher-loc>
<publisher-name><![CDATA[Consejo de Cuenca Almendares-Vento]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chigbo]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Uptake of arsenic, cadmium and mercury from polluted water by the water hyacinth E crassipes]]></article-title>
<source><![CDATA[Environ. Pollut.]]></source>
<year>1982</year>
<volume>27</volume>
<page-range>31-6</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ehler]]></surname>
<given-names><![CDATA[L.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Luthy]]></surname>
<given-names><![CDATA[R.G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Contaminant bioavailability in soil and sediment]]></article-title>
<source><![CDATA[Env. Sci. and Tech.]]></source>
<year>2003</year>
<volume>3</volume>
<page-range>296</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fergusson]]></surname>
<given-names><![CDATA[J.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[The heavy elements: Chemistry environmental impact and health effects]]></source>
<year>1992</year>
<page-range>502</page-range><publisher-loc><![CDATA[Nueva York ]]></publisher-loc>
<publisher-name><![CDATA[Pergamon Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fórstner]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
<name>
<surname><![CDATA[Wittmann]]></surname>
<given-names><![CDATA[G.T.W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Heavy metal pollution in the aquatic environment]]></source>
<year>1981</year>
<edition>2</edition>
<publisher-loc><![CDATA[Nueva York ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fuchs]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Haritopoulou]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Schafer]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilhelmi]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[runoff-monitoring of suspended solids river sediments and biofilms]]></article-title>
<source><![CDATA[Water Sci. Technol.]]></source>
<year>1997</year>
<volume>36</volume>
<page-range>277-82</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gale]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Adams]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Wixxon]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Loftin]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Lead, zinc, copper and cadmium in fish and sediments from the Big River and Flat River Creek of Missouri's Old Lead Belt]]></article-title>
<source><![CDATA[Environ. Geochem. Health]]></source>
<year>2004</year>
<volume>26</volume>
<page-range>37-49</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Garban]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Ollivon]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Carru]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Chesterikoff]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Origin, retention and release of trace metals from sediments of the River Seine]]></article-title>
<source><![CDATA[Water, Air Soil Pollut.]]></source>
<year>1996</year>
<volume>87</volume>
<page-range>363-81</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Goncalves]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Nogueiras]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Figeiras]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Putnis]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Almeida]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Base-metal and organic content in stream sediments in the vicinity of a landfill]]></article-title>
<source><![CDATA[Appl. Geochem.]]></source>
<year>2004</year>
<volume>19</volume>
<page-range>137-51</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kabata-Pendias]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Pendías]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Trace elements in soil and plants]]></source>
<year>1992</year>
<page-range>365</page-range><publisher-loc><![CDATA[Boca de Raton ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maddock]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Marinho]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Eichhornia Crassipes as biological monitor of heavy metals in surface waters]]></article-title>
<source><![CDATA[Metal in coastal environment of Latin America]]></source>
<year>1988</year>
<publisher-loc><![CDATA[Berlín ]]></publisher-loc>
<publisher-name><![CDATA[Pring Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martin]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Coughtrey]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biological monitoring of heavy metal pollution]]></source>
<year>1981</year>
<page-range>373</page-range><publisher-loc><![CDATA[Londres ]]></publisher-loc>
<publisher-name><![CDATA[Applied Science Publishers]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[N.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[J.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[StatisticandChemometrics for Analytical Chemistry]]></source>
<year>2002</year>
<edition>4</edition>
<page-range>278</page-range><publisher-loc><![CDATA[NuevaYork ]]></publisher-loc>
<publisher-name><![CDATA[Prentice Hall]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Niño-Sulkowska]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Lot]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio demográfico del lirio acuático Eichhornia crassipes (MMart.) Solms: dinámica de crecimiento en dos localidades selectas de México]]></article-title>
<source><![CDATA[Bol. de la Soc. Bot. de Méx.]]></source>
<year>1983</year>
<volume>45</volume>
<page-range>71-83</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Persaud]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Jaagumagi]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hayton]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Guidelines for the protection and management of aquatic sediment quality in Ontario]]></source>
<year>1993</year>
<page-range>23</page-range><publisher-loc><![CDATA[Ottawa, Ontario ]]></publisher-loc>
<publisher-name><![CDATA[Ontario Ministry of the Environment]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rubio]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[López-Sánchez]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Rauret]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La especiación sólida de trazas de metales en sedimentos. Aplicación a sedimentos muy contaminados]]></article-title>
<source><![CDATA[Anal. Quím.]]></source>
<year>1991</year>
<volume>87</volume>
<page-range>599-605</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sakai]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Kojima]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Saito]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Distribution of heavy metals in water and sieved sediments in the Toyohira River]]></article-title>
<source><![CDATA[Water Res.]]></source>
<year>1986</year>
<volume>20</volume>
<page-range>559-67</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[St-Cyr]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Cattaneo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Chasse]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Fraikin]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Technical evaluation of monitoring methods using macrophytes, phytoplankton and periphyton to assess the impact of mine effluents on the aquatic environment]]></source>
<year>1997</year>
<page-range>218</page-range><publisher-loc><![CDATA[Canadá ]]></publisher-loc>
<publisher-name><![CDATA[Canada Center for Mineral and Energy Technology]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tessier]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Campbell]]></surname>
<given-names><![CDATA[P.G.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Bisson]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sequential extraction procedure for the speciation of particulate trace metals]]></article-title>
<source><![CDATA[Anal. Chem.]]></source>
<year>1979</year>
<volume>51</volume>
<page-range>844-51</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="">
<collab>USEPA (US Environmental Protection Agency</collab>
<source><![CDATA[The incidence and severity of sediment contamination in surface waters of the United States. EPA 823-R-97-006]]></source>
<year>1997</year>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Usero]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Morrillo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gracia]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Contaminación por metales en sedimentos acuáticos]]></article-title>
<source><![CDATA[Tecnología del agua]]></source>
<year>1997</year>
<volume>166</volume>
<page-range>44-50</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vesk]]></surname>
<given-names><![CDATA[P. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Allaway]]></surname>
<given-names><![CDATA[W. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spatial variation of copper and lead concentrations of water hyacinth plants in a wetland receiving urban run-off]]></article-title>
<source><![CDATA[Aquat. Bot.]]></source>
<year>1997</year>
<volume>59</volume>
<page-range>33-44</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Xiaomei]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Maleeya]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Prayad]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Kanuporn]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Removal of cadmium and zinc by water hyacinth Eichhornia Crassipes]]></article-title>
<source><![CDATA[Sci. Asia]]></source>
<year>2004</year>
<volume>30</volume>
<page-range>93-103</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
