Chelate-induced phytoextraction of metal polluted soils with Brachiaria decumbens

Santos, Fabiana Soares dos; Hernández-Allica, Javier; Becerril, José M.; Amaral-Sobrinho, Nelson Moura Brasil; Mazur, Nelson; Garbisu, Carlos

doi:10.1016/j.chemosphere.2006.03.012

Cited by 89 publications

(51 citation statements)

References 33 publications

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“…Further natural or synthetic aminopolycarboxylic acids (APCA) such as nitrilotriacetic (NTA), ethylenediaminedisuccinic (EDDS), hydroxyethyl-ethylenediaminetriacetic (HEDTA) and hydroxyethyl-iminodiacetic (HEIDA) have been successfully used for assisted metal phytoextraction (Huang et al, 1997;Chiu et al, 2005;Luo et al, 2005). However, as reported by different authors (Luo et al, 2005;Santos et al, 2006;Cao et al, 2007), the addition of chelators with high complexant capabilities to the soil can increase the heavy metal concentration in soil solution to well over the translocation potential of plants. In fact, the amount of metal sorbed by the root system and translocated in shoots not only depends on the metal percentage in the bioavailable fraction, but also on the form (free ion or bound with a complexant) in which they are present in this fraction (Kamnev and van der Lelie, 2000;Chen et al, 2003;Alkorta et al, 2004).…”

Section: Introductionmentioning

confidence: 93%

“…There is, therefore, the possibility that heavy metals mobilized in the soil leach into the subsoil or into ground-or surface waters instead of accumulating in the plant. In addition, APCAs exhibit a significant toxicity for plants and soil microorganisms (Huang et al, 1997;Santos et al, 2006) and in some cases show a strong persistence in soil. The use of natural, low molecular weight organic acids (NLMWOA), which are characterized by lower toxicity and higher biodegradability, has been proposed for assisted phytoremediation as an alternative to the above-mentioned chelators, (Quartacci et al, 2005;do Nascimento et al, 2006;Evangelou et al, 2006;Liu et al, 2008), thus providing translocation percentages similar to those obtained with APCAs without increasing the risk of metal leaching.…”

Section: Introductionmentioning

confidence: 99%

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Heavy metal distribution between contaminated soil and Paulownia tomentosa, in a pilot-scale assisted phytoremediation study: Influence of different complexing agents

et al. 2008

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a b s t r a c tThe distribution of Cd, Cu, Pb and Zn between a contaminated soil and the tree species Paulownia tomentosa was investigated in a pilot-scale assisted phytoremediation study. The influence of the addition of EDTA, tartrate and glutamate at 1, 5 and 10 mM concentrations on metal accumulation by the plant and on metal mobilization in soil was evaluated. Root/shoot metal concentration ratios were in the range of 3-5 for Zn, 7-17 for Cu, 9-18 for Cd and 11-39 for Pb, depending on the type and concentration of complexing agent. A significant enhancement of metal uptake in response to complexing agent application was mainly obtained in roots for Pb (i.e. 359 mg kg À1 for EDTA 10 mM and 128 mg kg À1 for the control), Cu (i.e. 594 mg kg À1 for glutamate 10 mM and 146 mg kg À1 for the control) and, with the exception of glutamate, also for Zn (i.e. 670 mg kg À1 for tartrate 10 mM and 237 mg kg À1 for the control). Despite its higher metal mobilization capacity, EDTA produced a metal accumulation in plants quite similar to those obtained with tartrate and glutamate. Consequently the concentration gradient between soil pore water and plant tissues does not seem to be the predominant mechanism for metal accumulation in Paulownia tomentosa and a role of the plant should be invoked in the selection of the chemical species taken up. Metal bioavailability in soil at the end of the experiment was higher in the trials treated with EDTA than in those treated with tartrate and glutamate, the latter not being significantly different from the control. These findings indicated the persistence of a leaching risk associated to the use of this chelator, while an increase of the environmental impact is not expected when glutamate and tartrate are applied.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Heavy metal distribution between contaminated soil and Paulownia tomentosa, in a pilot-scale assisted phytoremediation study: Influence of different complexing agents

et al. 2008

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“…Studies to select efficient plants are necessary, because plants have different potential for phytoextraction among species and environments [7], being necessary studies to evaluate the adaptability and efficiency to each specific situation. Thus, the interest for phytoremediation of contaminated areas with heavy metal is increasing over the years and throughout the world to reduce the negative environmental impact [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Copper Phytoextraction and Phytostabilization by <i>Brachiaria decumbens</i> Stapf. in Vineyard Soils and a Copper Mining Waste

Andreazza¹,

Bortolon²,

Pieniz³

et al. 2013

OJSS

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Brachiaria decumbens is a high biomass plant with great potential for phytoremediation of copper-polluted soils. The current study aimed to evaluate B. decumbens plants for phytoextraction and phytostabilization use in two different copper contaminated vineyard soils and a copper mining waste. Also, the macro and micronutrients uptake were evaluated after plants growth in copper contaminated soils. B. decumbens was cultivated in two vineyard soils (Inceptisol and Mollisol) and a copper mining waste for 47 days of growth in greenhouse. Then, B. decumbens's nutrient uptake was evaluated, and it's potential application in phytoremediation techniques for the phytoextraction and phytostabilization of copper contamination. B. decumbens exhibited high levels of biomass production at contaminated soils and no negative effect on macronutrients uptake was found. Copper contaminated soils affected micronutrients uptake by Brachiaria plants. This Brachiaria specie showed high potential on copper phytoextraction with accumulation of copper concentrations in the shoots and roots of 70 and 585 mg·kg −1 of dry mass, respectively, in the vineyard Inceptisol soil, after 47 days of growth. Mollisol soil and copper mining waste also exhibited high copper concentration in the biomass in the entire plant with 371 and 466 mg·kg −1 , respectively. Although Brachiaria exhibited low levels of translocation factor for copper, this specie showed high potential for copper phytoextraction on Inceptisol, Mollisol and copper mining waste with 1900, 1156 and 1363 g·ha −1 of copper, respectively. In summary, B. decumbens plants showed high potential for copper phytoextraction and phytostabilization of copper on contaminated vineyard soils and copper mining waste.

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“…2009). Santos et al (2006) have observed an increase of up to 2.7 times in the absorption of Cd in Brachiaria decumbens after the application of phytochelines, showing that this species can also increase its remediation power in contaminated soils.…”

Section: Greenhousementioning

confidence: 90%

Germination and initial development of Brachiaria brizantha and Brachiaria decumbens on exposure to cadmium, lead and copper

et al. 2016

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-The objective was to evaluate the germination and initial development of three cultivars of Brachiaria brizantha and Brachiaria decumbens in the presence of trace elements of Cd, Pb and Cu and quantify the Cd and Cu contents in plant tissue of these species. First, seed germination occurred in towel paper containing cadmium, lead, copper and the control. We calculated the percentage of germination, germination speed index, vigor index and seedling length. Later, the seeds were germinated in soil pots contaminated with Cd and Cu, where the Soil-Plant Analysis Development index (SPAD index) was evaluated, as well as dry matter of shoot and root, and the Cd and Cu metal content in plant tissue was quantified. B. decumbens showed sensitivity to the elements studied, with decreases in all parameters. Cu was the element that caused more toxic effects on germination and early seedling development of the species studied. In contaminated soil, the species studied showed no differences in dry matter production of shoots, but the exposure to Cd and Cu caused reductions in SPAD index in all species. The highest Cd and Cu contents were found in the roots.

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Chelate-induced phytoextraction of metal polluted soils with Brachiaria decumbens

Cited by 89 publications

References 33 publications

Heavy metal distribution between contaminated soil and Paulownia tomentosa, in a pilot-scale assisted phytoremediation study: Influence of different complexing agents

Heavy metal distribution between contaminated soil and Paulownia tomentosa, in a pilot-scale assisted phytoremediation study: Influence of different complexing agents

Copper Phytoextraction and Phytostabilization by <i>Brachiaria decumbens</i> Stapf. in Vineyard Soils and a Copper Mining Waste

Germination and initial development of Brachiaria brizantha and Brachiaria decumbens on exposure to cadmium, lead and copper

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Chelate-induced phytoextraction of metal polluted soils with Brachiaria decumbens

Cited by 89 publications

References 33 publications

Heavy metal distribution between contaminated soil and Paulownia tomentosa, in a pilot-scale assisted phytoremediation study: Influence of different complexing agents

Heavy metal distribution between contaminated soil and Paulownia tomentosa, in a pilot-scale assisted phytoremediation study: Influence of different complexing agents

Copper Phytoextraction and Phytostabilization by &lt;i&gt;Brachiaria decumbens&lt;/i&gt; Stapf. in Vineyard Soils and a Copper Mining Waste

Germination and initial development of Brachiaria brizantha and Brachiaria decumbens on exposure to cadmium, lead and copper

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Copper Phytoextraction and Phytostabilization by <i>Brachiaria decumbens</i> Stapf. in Vineyard Soils and a Copper Mining Waste