Abstract
Mining activities in Chile generate massive amounts of tailings, creating significant environmental risks due to heavy metal contamination. Phytoremediation offers an eco-friendly solution, yet studies on native Chilean species are scarce. This study evaluates the effects of ethylenediamine tetraacetic acid (EDTA) and nanoscale zero-valent iron (nZVI) on the potential of the native Cistanthe grandiflora for the phytoremediation of copper mine tailings. A six-month pot experiment was conducted with four treatments: EDTA 300 mg·kg−1, EDTA 600 mg·kg−1, nZVI 500 mg·kg−1, and a control group without additions. The results indicate that Cistanthe grandiflora primarily acts as a phytostabilizer, accumulating higher metal concentrations in roots than in aerial parts. The application of EDTA significantly enhanced the Bioconcentration Factor for Cu, Ni, Pb, and Mo, increasing BCF values from 0.5 to 1.0 or more in several cases. Specifically, a lower dose of EDTA (300 mg·kg−1) successfully increased the Translocation Factor (TF) of cadmium to 1.3, suggesting a potential for phytoextraction for this element. Conversely, nZVI application showed a limited impact, slightly improving the Translocation factor for copper and chromium but without exceeding unity. These findings demonstrate that Cistanthe grandiflora, assisted by EDTA, is a promising candidate for the phytostabilization of heavy metals in mine tailings.
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Claims 6
Claim · model-written summary
Cistanthe grandiflora primarily acts as a phytostabilizer, accumulating higher metal concentrations in roots than in aerial parts.
- Taxon
- Cistanthe grandiflora
Cistanthe grandiflorae0 - Organ / stage
- rootse0
- Outcome
- metal concentrationse0
- Direction
- highere0
- Comparator
- aerial partse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cistanthe grandiflora primarily acts as a phytostabilizer, accumulating higher metal concentrations in roots than in aerial parts”
Claim · model-written summary
EDTA significantly enhanced the bioconcentration factor for Cu, Ni and Pb in Cistanthe grandiflora compared with the control group.
- Taxon
- Cistanthe grandifloraCistanthe grandiflorat0
- Treatment
- EDTAe2
- Outcome
- Bioconcentration Factor for Cu, Ni, Pbe2
- Direction
- enhancede2
- Value
- 0.5 to 1.0 or moree2
- Qualifier
- in several casese2
- Comparator
- a control group without additionse1
- Setting
- pot experimente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cistanthe grandiflora”
e1“A six-month pot experiment was conducted with four treatments: EDTA 300 mg·kg−1, EDTA 600 mg·kg−1, nZVI 500 mg·kg−1, and a control group without additions”
e2“The application of EDTA significantly enhanced the Bioconcentration Factor for Cu, Ni, Pb, and Mo, increasing BCF values from 0.5 to 1.0 or more in several cases”
Claim · model-written summary
EDTA significantly enhanced the bioconcentration factor for Mo in Cistanthe grandiflora compared with the control group.
- Taxon
- Cistanthe grandifloraCistanthe grandiflorat0
- Treatment
- EDTAe2
- Outcome
- Bioconcentration Factore2
- Direction
- enhancede2
- Value
- 0.5 to 1.0 or moree2
- Qualifier
- Moe2
- Comparator
- a control group without additionse1
- Setting
- pot experimente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cistanthe grandiflora”
e1“A six-month pot experiment was conducted with four treatments: EDTA 300 mg·kg−1, EDTA 600 mg·kg−1, nZVI 500 mg·kg−1, and a control group without additions”
e2“The application of EDTA significantly enhanced the Bioconcentration Factor for Cu, Ni, Pb, and Mo, increasing BCF values from 0.5 to 1.0 or more in several cases”
Claim · model-written summary
A lower dose of EDTA (300 mg·kg−1) increased the translocation factor of cadmium in Cistanthe grandiflora to 1.3, suggesting potential for phytoextraction.
- Taxon
- Cistanthe grandifloraCistanthe grandiflorat0
- Treatment
- a lower dose of EDTA (300 mg·kg−1)e3
- Outcome
- Translocation Factor (TF) of cadmiume3
- Direction
- increasede3
- Value
- 1.3e3
- Qualifier
- suggesting a potential for phytoextractione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cistanthe grandiflora”
e3“a lower dose of EDTA (300 mg·kg−1) successfully increased the Translocation Factor (TF) of cadmium to 1.3, suggesting a potential for phytoextraction for this element”
Claim · model-written summary
nZVI application slightly improved the translocation factor for copper and chromium in Cistanthe grandiflora, without exceeding unity; its impact was limited.
- Taxon
- Cistanthe grandifloraCistanthe grandiflorat0
- Treatment
- nZVI applicatione4
- Outcome
- Translocation factor for copper and chromiume4
- Direction
- slightly improvinge4
- Qualifier
- without exceeding unitye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cistanthe grandiflora”
e4“nZVI application showed a limited impact, slightly improving the Translocation factor for copper and chromium but without exceeding unity”
Claim · model-written summary
Cistanthe grandiflora assisted by EDTA is a promising candidate for phytostabilization of heavy metals in mine tailings.
- Taxon
- Cistanthe grandifloraCistanthe grandiflorae5
- Treatment
- assisted by EDTAe5
- Outcome
- promising candidate for the phytostabilization of heavy metals in mine tailingse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“These findings demonstrate that Cistanthe grandiflora, assisted by EDTA, is a promising candidate for the phytostabilization of heavy metals in mine tailings”