Evaluation of sulfate rhizofiltration by <i>Carpobrotus chilensis</i> for treating mining waters

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dc.contributor.authorTapia, Y.
dc.contributor.authorSalazar, O.
dc.contributor.authorJoven, A.
dc.contributor.authorCastillo, B.
dc.contributor.authorUrdiales, C.
dc.contributor.authorGarcia, A.
dc.contributor.authorIhle, C.
dc.contributor.authorAcuna, E.
dc.date.accessioned2025-01-20T17:06:29Z
dc.date.available2025-01-20T17:06:29Z
dc.date.issued2024
dc.description.abstractChile, the world's leading copper producer, generates significant volumes of mining waters, some of which cannot be recirculated into the production process. These mining waters are characterized by elevated sulfate (SO42-) concentrations, requiring sustainable management strategies for potential reuse. This study aims to evaluate the rhizofiltration technique using Carpobrotus chilensis for treating mining waters with a high SO(4)(2- )concentration. Initially, the mining waters exhibited a pH of 7.97 +/- 0.16 and a SO42- concentration of 2,743 +/- 137 mg L-1, while the control water had a pH of 7.88 +/- 0.08 and a SO42- concentration of 775 +/- 19.0 mg L-1. The plants were hydroponically cultivated in 40 L containers with mining waters and drinking water as a control. Over an 8-week period, the pH of the mining water decreased to 3.12 +/- 0.01, and the SO42- concentration declined to 2,200 +/- 110 mg L-1. Notably, the fresh weight of roots was significantly higher in plants grown in mining water (22.2 +/- 6.66 g) compared to those in the control treatment (14.3 +/- 4.28 g). However, an undesirable increase in the acidity was observed in the mining waters after rhizofiltration, which was attributed to hydrogen sulfate (HSO4-) and/or root exudates. Despite the unexpected increase in acidity, C. chilensis effectively reduced the concentration of SO42- in mining waters by 20%. Additionally, the C. chilensis roots accumulated 4.84 +/- 1.40% of sulfur (S), a level comparable to thiophore plants. This study provides evidence that this non-aquatic plant can be used in sulfate rhizofiltration. NOVELTY STATEMENT Caprobrotus chilensis is a good candidate for sulfate rhizolfiltration in mining waters. The accumulation of sulfur by the roots of Carpobrotus chilensis reached 4.84% Mining waters with a high concentration of sulfates require control of the redox potential
dc.fuente.origenWOS
dc.identifier.doi10.1080/15226514.2024.2338136
dc.identifier.eissn1549-7879
dc.identifier.issn1522-6514
dc.identifier.urihttps://doi.org/10.1080/15226514.2024.2338136
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90791
dc.identifier.wosidWOS:001198491000001
dc.issue.numero10
dc.language.isoen
dc.pagina.final1563
dc.pagina.inicio1556
dc.revistaInternational journal of phytoremediation
dc.rightsacceso restringido
dc.subjectBiomass
dc.subjectmining water treatment
dc.subjectsulfur
dc.subjectthiophore plants
dc.titleEvaluation of sulfate rhizofiltration by <i>Carpobrotus chilensis</i> for treating mining waters
dc.typeartículo
dc.volumen26
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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