SOIL ACIDIFICATION AS A CONFOUNDING FACTOR ON METAL PHYTOTOXICITY IN SOILS SPIKED WITH COPPER-RICH MINE WASTES

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dc.contributor.authorGinocchio, Rosanna
dc.contributor.authorMaria de la Fuente, Luz
dc.contributor.authorSanchez, Pablo
dc.contributor.authorBustamante, Elena
dc.contributor.authorSilva, Yasna
dc.contributor.authorUrrestarazu, Paola
dc.contributor.authorRodriguez, Patricio H.
dc.date.accessioned2024-01-10T12:08:40Z
dc.date.available2024-01-10T12:08:40Z
dc.date.issued2009
dc.description.abstractPollution of soil with mine wastes results in both Cu enrichment and soil acidification. This confounding effect may be very important in terms of phytotoxicity, because pH is a key parameter influencing Cu solubility in soil solution. Laboratory toxicity tests were used to assess the effect of acidification by acidic mine wastes on Cu solubility and on root elongation of barley (Hordeum vulgare L.). Three contrasting substrates (two soils and a commercial sand) and two acidic, Cu-rich mine wastes (oxidized tailings [OxT] and smelter dust [SmD]) were selected as experimental materials. Substrates were spiked with a fixed amount of either SmD or OxT, and the pH of experimental mixtures was then modified in the range of 4.0 to 6.0 and 7.0 using PIPES (piperazine-1,4-bis(2-ethanesulfonic acid)), MES (2-(N-morpholino) ethanesulfonic acid), and MOPS (3-(N-Morpholino)-propanesulfonic acid) buffers. Chemical (pore-water Cu and pH) and toxicological (root length of barley plants) parameters were determined for experimental mixtures. Addition of SmD and OxT to substrates resulted in acidification (0.11-1.16 pH units) and high levels of soluble Cu and Zn. Neutralization of experimental mixtures with MES (pH 6.0) and MOPS (pH 7.0) buffers resulted in a marked decrease in soluble Cu and Zn, but the intensity of the effect was substrate-dependent. Adjustment of soil pH above the range normally considered to be toxic to plants (pH in water extract, > 5.5) significantly reduced metal toxicity in barley, but phytotoxicity was not completely eliminated. The present results stress the importance of considering confounding effects on derivation of toxicity thresholds to plants when using laboratory phytotoxicity tests.
dc.description.funderInternational Copper Association
dc.format.extent13 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1897/08-617.1
dc.identifier.eissn1552-8618
dc.identifier.issn0730-7268
dc.identifier.pubmedidMEDLINE:19480535
dc.identifier.urihttps://doi.org/10.1897/08-617.1
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76415
dc.identifier.wosidWOS:000269688800008
dc.information.autorucAgronomía e Ing. Forestal;Ginocchio R;S/I;61759
dc.issue.numero10
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final2081
dc.pagina.inicio2069
dc.publisherWILEY
dc.revistaENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
dc.rightsregistro bibliográfico
dc.subjectSoil acidification
dc.subjectTailings
dc.subjectSmelter dust
dc.subjectCopper toxicity
dc.subjectBarley
dc.subjectMICROBIAL PROCESSES
dc.subjectCONTAMINATED SOILS
dc.subjectCROP PLANTS
dc.subjectPORE-WATER
dc.subjectTOXICITY
dc.subjectPH
dc.subjectZINC
dc.subjectRANGE
dc.subjectBIOAVAILABILITY
dc.subjectTEMPERATURE
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleSOIL ACIDIFICATION AS A CONFOUNDING FACTOR ON METAL PHYTOTOXICITY IN SOILS SPIKED WITH COPPER-RICH MINE WASTES
dc.typeartículo
dc.volumen28
sipa.codpersvinculados61759
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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