Why a fern (Pteris multifida) dominantly growing on an arsenic/heavy metal contaminated soil does not accumulate arsenic?
Identifieur interne : 00AF86 ( Main/Exploration ); précédent : 00AF85; suivant : 00AF87Why a fern (Pteris multifida) dominantly growing on an arsenic/heavy metal contaminated soil does not accumulate arsenic?
Auteurs : M. X. Zheng [République populaire de Chine] ; J. M. Xu [République populaire de Chine] ; L. Smith [Australie] ; R. Naidu [Australie]Source :
- Journal de physique. IV [ 1155-4339 ] ; 2003.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Métal lourd, Exploitation minière.
English descriptors
- KwdEn :
Abstract
é"Abstract. A kind of fern (Pteris multifida) is growing dominantly on a lead/zinc mine tailings contaminated soil located in Shaoxing, Zhejiang Province, the People's Republic of China. The soil was heavily contaminated by heavy metals and arsenic, especially by lead, arsenic, and zinc. The total concentration (mg/kg) ranges for As, Cd, Cr, Cu, Pb, and Zn in the soil were 1370-4539, 3.0-9.3, 39-48, 65-206, 5271-16397, and 387-1221, respectively. The accumulative characteristics of heavy metals and arsenic in the fern pteris multifida showed that it accumulated lead 86-237 mg/kg in leaf, 33-741 mg/kg in stem, 879-4040 mg/kg in root and accumulated arsenic only 0.3-1.6 mg/kg in leaf, 0.5-8.0 mg/kg in stem, 24-45 mg/kg in root. Some ferns were reportedly As hyperaccumulators by some researchers. Why a fern (Pteris multifida) grown on a high As-contaminated soil in the present research could not accumulate arsenic? Further analyses indicated that water-soluble arsenic was almost zero and water-soluble Pb was high. It is suggested that high concentration Pb reacted with arsenic in soil solution to form a stable mineral. X-ray diffraction determination proved that there was a mineral, beudantite PbFe3(AsO4)(SO4)(OH)6) in <0.002 mm clay fraction of the contaminated soil. The solubility product (Ksp) of beudantite was reportedly 10-21, leading to very low water-soluble As in the soil.
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Xu</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Institute for Soil and Water Resources & Environmental Science, Zhejiang University</s1><s2>Hangzhou 310029</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Hangzhou</settlement><region type="province">Zhejiang</region><settlement type="city">Hangzhou</settlement></placeName><orgName type="university">Université de Zhejiang</orgName></affiliation></author><author><name sortKey="Smith, L" sort="Smith, L" uniqKey="Smith L" first="L." last="Smith">L. Smith</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>CSIRO Land & Water</s1><s2>Glen Osmond, Adelaide 5064</s2><s3>AUS</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>CSIRO Land & Water</wicri:noRegion></affiliation></author><author><name sortKey="Naidu, R" sort="Naidu, R" uniqKey="Naidu R" first="R." last="Naidu">R. 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X." last="Zheng">M. X. Zheng</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Institute for Soil and Water Resources & Environmental Science, Zhejiang University</s1><s2>Hangzhou 310029</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Hangzhou</settlement><region type="province">Zhejiang</region><settlement type="city">Hangzhou</settlement></placeName><orgName type="university">Université de Zhejiang</orgName></affiliation></author><author><name sortKey="Xu, J M" sort="Xu, J M" uniqKey="Xu J" first="J. M." last="Xu">J. M. Xu</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Institute for Soil and Water Resources & Environmental Science, Zhejiang University</s1><s2>Hangzhou 310029</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Hangzhou</settlement><region type="province">Zhejiang</region><settlement type="city">Hangzhou</settlement></placeName><orgName type="university">Université de Zhejiang</orgName></affiliation></author><author><name sortKey="Smith, L" sort="Smith, L" uniqKey="Smith L" first="L." last="Smith">L. Smith</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>CSIRO Land & Water</s1><s2>Glen Osmond, Adelaide 5064</s2><s3>AUS</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>CSIRO Land & Water</wicri:noRegion></affiliation></author><author><name sortKey="Naidu, R" sort="Naidu, R" uniqKey="Naidu R" first="R." last="Naidu">R. Naidu</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>CSIRO Land & Water</s1><s2>Glen Osmond, Adelaide 5064</s2><s3>AUS</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>CSIRO Land & Water</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Journal de physique. IV</title><title level="j" type="abbreviated">J. phys., IV</title><idno type="ISSN">1155-4339</idno><imprint><date when="2003">2003</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal de physique. IV</title><title level="j" type="abbreviated">J. phys., IV</title><idno type="ISSN">1155-4339</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Arsenic</term><term>Biological accumulation</term><term>Chemical contamination</term><term>China</term><term>Dominant species</term><term>Heavy metal</term><term>Mine</term><term>Mining</term><term>Mining zone</term><term>Phytoremediation</term><term>Pteris</term><term>Revegetation</term><term>Soil pollution</term><term>Tolerance</term><term>Zhejiang China</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Contamination chimique</term><term>Pollution sol</term><term>Arsenic</term><term>Métal lourd</term><term>Espèce dominante</term><term>Remise en verdure</term><term>Zone minière</term><term>Exploitation minière</term><term>Mine</term><term>Phytoremédiation</term><term>Tolérance</term><term>Accumulation biologique</term><term>Chine</term><term>Pteris</term><term>Pteris multifida</term><term>Zhejiang</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Métal lourd</term><term>Exploitation minière</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">é"Abstract. A kind of fern (Pteris multifida) is growing dominantly on a lead/zinc mine tailings contaminated soil located in Shaoxing, Zhejiang Province, the People's Republic of China. The soil was heavily contaminated by heavy metals and arsenic, especially by lead, arsenic, and zinc. The total concentration (mg/kg) ranges for As, Cd, Cr, Cu, Pb, and Zn in the soil were 1370-4539, 3.0-9.3, 39-48, 65-206, 5271-16397, and 387-1221, respectively. The accumulative characteristics of heavy metals and arsenic in the fern pteris multifida showed that it accumulated lead 86-237 mg/kg in leaf, 33-741 mg/kg in stem, 879-4040 mg/kg in root and accumulated arsenic only 0.3-1.6 mg/kg in leaf, 0.5-8.0 mg/kg in stem, 24-45 mg/kg in root. Some ferns were reportedly As hyperaccumulators by some researchers. Why a fern (Pteris multifida) grown on a high As-contaminated soil in the present research could not accumulate arsenic? Further analyses indicated that water-soluble arsenic was almost zero and water-soluble Pb was high. It is suggested that high concentration Pb reacted with arsenic in soil solution to form a stable mineral. X-ray diffraction determination proved that there was a mineral, beudantite PbFe<sub>3</sub>(AsO<sub>4</sub>)(SO<sub>4</sub>)(OH)<sub>6</sub>) in <0.002 mm clay fraction of the contaminated soil. The solubility product (Ksp) of beudantite was reportedly 10<sup>-21</sup>, leading to very low water-soluble As in the soil.</div></front></TEI><affiliations><list><country><li>Australie</li><li>République populaire de Chine</li></country><region><li>Zhejiang</li></region><settlement><li>Hangzhou</li></settlement><orgName><li>Université de Zhejiang</li></orgName></list><tree><country name="République populaire de Chine"><region name="Zhejiang"><name sortKey="Zheng, M X" sort="Zheng, M X" uniqKey="Zheng M" first="M. X." last="Zheng">M. X. Zheng</name></region><name sortKey="Xu, J M" sort="Xu, J M" uniqKey="Xu J" first="J. M." last="Xu">J. M. Xu</name></country><country name="Australie"><noRegion><name sortKey="Smith, L" sort="Smith, L" uniqKey="Smith L" first="L." last="Smith">L. Smith</name></noRegion><name sortKey="Naidu, R" sort="Naidu, R" uniqKey="Naidu R" first="R." last="Naidu">R. Naidu</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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