The fate of arsenic, cadmium and lead in Typha latifolia: A case study on the applicability of micro-PIXE in plant ionomics

This study presents the results of a coupled electrocoagulation-phytoremediation treatment for the reduction of copper, cadmium, lead, and zinc, present in aqueous solution. The electrocoagulation was carried out in a batch reactor using aluminum electrodes in parallel arrangement; the optimal conditions were current density of 8 mA/cm 2 and operating time of 180 minutes. For phytoremediation the macrophytes, Typha latifolia L., were used during seven days of treatment. The results indicated that the coupled treatment reduced metal concentrations by 99.2% Cu, 81.3% Cd, and 99.4% Pb, while Zn increased due to the natural concentrations of the plant used.

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“…The tendency of observed bioaccumulation was Pb > Cu > Cd > Zn, very similar to that reported by Lyubenova et al [64].…”

Section: Bioaccumulation Factor Insupporting

confidence: 90%

Removal of Pb, Cu, Cd, and Zn Present in Aqueous Solution Using Coupled Electrocoagulation-Phytoremediation Treatment

Ferniza-García

Amaya-Chávez

Roa‐Morales

et al. 2017

International Journal of Electrochemistry

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“…Using a cryo-transfer assembly, cooled with liquid nitrogen, the containers were transferred to an Alpha 2-4 Christ freeze-dryer where sections were freeze dried at À30°C at 0.3 mbar for 3 d. Freeze-dried sections were mounted between two layers of Pioloform foil stretched over aluminium holders. Micro-PIXE analysis of the samples was performed at the Jo zef Stefan Institute (JSI), Slovenia, as described previously (Vogel-Miku s et al, 2008a;Lyubenova et al, 2013). Two upgrades have been made recently to the nuclear microprobe.…”

Section: Micro-pixe Analysesmentioning

confidence: 99%

Gomphrena claussenii, a novel metal‐hypertolerant bioindicator species, sequesters cadmium, but not zinc, in vacuolar oxalate crystals

et al. 2015

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SummaryGomphrena claussenii is a recently described zinc (Zn)-and cadmium (Cd)-hypertolerant Amaranthaceae species displaying a metal bioindicator Zn/Cd accumulation response. We investigated the Zn and Cd distribution in stem and leaf tissues of G. claussenii at the cellular level, and determined metabolite profiles to investigate metabolite involvement in Zn and Cd sequestration.Gomphrena claussenii plants exposed to high Zn and Cd supply were analysed by scanning electron microscopy with energy-dispersive X-ray (SEM-EDX) and micro-proton-induced X-ray emission (micro-PIXE). In addition, gas chromatography-time of flight-mass spectrometry (GC-TOF-MS) was used to determine metabolite profiles on high Zn and Cd exposure.Stem and leaf tissues of G. claussenii plants exposed to control and high Cd conditions showed the abundant presence of calcium oxalate (CaOx) crystals, but on high Zn exposure, their abundance was strongly reduced. Ca and Cd co-localized to the CaOx crystals in Cd-exposed plants. Citrate, malate and oxalate levels were all higher in shoot tissues of metal-exposed plants, with oxalate levels induced 2.6-fold on Zn exposure and 6.4-fold on Cd exposure.Sequestration of Cd in vacuolar CaOx crystals of G. claussenii is found to be a novel mechanism to deal with Cd accumulation and tolerance.

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“…O estudo da tolerância de macrófitas aquáticas a elementos tóxicos vem sendo relatado na literatura para muitas espécies, como: Eichhornia crassipes (Pereira et al, 2011), Pistia stratiotes (Silva et al, 2013) e Typha latifolia (Lyubenova et al, 2013).…”

Section: Introductionunclassified

Relações da anatomia radicular na absorção, no acúmulo e na tolerância ao chumbo em Echinodorus grandiflorus

Ribeiro

Pereira

Castro

et al. 2015

Rev. bras. eng. agríc. ambient.

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RESUMO A contaminação por chumbo (Pb) é uma preocupação crescente em todo o mundo uma vez que os ambientes aquáticos são sujeitos sobretudo a inúmeras fontes de poluição. Este trabalho teve, como objetivo, avaliar a tolerância de E. grandiflorus ao Pb e sua capacidade de acumular e alocar o poluente e a relação dessas características com a anatomia radicular. Foram montados experimentos com plantas de E. grandiflorus expostas às seguintes concentrações de Pb em solução nutritiva: [0; 0,75; 1,5; 3,0 e 9,0 μM de Pb(NO3)2]. As plantas foram mantidas nessas condições, durante 60 dias. Avaliaram-se, ao final do experimento, a concentração de chumbo na biomassa das plantas e as modificações na anatomia radicular. As plantas de E. grandiflorus acumularam 113,74 mg Pb kg-1 de matéria seca com translocação reduzida para a parte aérea. As modificações no xilema radicular demonstraram aumento na capacidade de condução de água e nutrientes nas plantas expostas ao Pb. Constatou-se espessamento da exoderme e do córtex radicular; é provável que essas modificações estejam relacionadas com a maior alocação de Pb nas raízes. As plantas de Echinodorus grandiflorus são capazes de absorver e acumular Pb principalmente nas raízes; esta absorção é, por outro lado, modulada pela anatomia radicular.

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The fate of arsenic, cadmium and lead in Typha latifolia: A case study on the applicability of micro-PIXE in plant ionomics

Cited by 57 publications

References 41 publications

Removal of Pb, Cu, Cd, and Zn Present in Aqueous Solution Using Coupled Electrocoagulation-Phytoremediation Treatment

Removal of Pb, Cu, Cd, and Zn Present in Aqueous Solution Using Coupled Electrocoagulation-Phytoremediation Treatment

Gomphrena claussenii, a novel metal‐hypertolerant bioindicator species, sequesters cadmium, but not zinc, in vacuolar oxalate crystals

Relações da anatomia radicular na absorção, no acúmulo e na tolerância ao chumbo em Echinodorus grandiflorus

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