Abstract:Phytostabilization of metals using trees is often promoted although the influence of different tree species on the mobilization of metals is not yet clear. This study examined effects of six tree species on the soil characteristics pH, organic carbon (OC) content and cation exchange capacity (CEC) and on the redistribution of cadmium (Cd) and zinc (Zn) on a polluted sandy soil. Soil and biomass were sampled in 10-years-old stands growing on former agricultural land. The tree species included were silver birch … Show more
“…For our purposes, we calculated the potential of copper phytoextraction by Brachiaria decumbens with a mean value of 5000 kg·ha −1 of phytomass production. Phytostabilization of metals using trees or other perennial species is often promoted and can be an important strategy to control heavy metals polluted sites [20]. Thereby, phytostabilization use plants to reduce the bioavailability of pollutants in the environment and stabilize pollutants in soils, thus rendering their harmless and reducing the risk of further environmental degradation by leaching of pollutants into the ground water or by airborne spread [5].…”
Section: Discussionmentioning
confidence: 99%
“…This technique is used successfully for heavy metals [17][18][19][20] and organic amendments [21]. This process can play an important role in the vineyard soils contaminated with copper, due to these areas are usually located in steep mountains with sandy soils, subjected to erodibility, promoting high soil losses by surface runoff.…”
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.
“…For our purposes, we calculated the potential of copper phytoextraction by Brachiaria decumbens with a mean value of 5000 kg·ha −1 of phytomass production. Phytostabilization of metals using trees or other perennial species is often promoted and can be an important strategy to control heavy metals polluted sites [20]. Thereby, phytostabilization use plants to reduce the bioavailability of pollutants in the environment and stabilize pollutants in soils, thus rendering their harmless and reducing the risk of further environmental degradation by leaching of pollutants into the ground water or by airborne spread [5].…”
Section: Discussionmentioning
confidence: 99%
“…This technique is used successfully for heavy metals [17][18][19][20] and organic amendments [21]. This process can play an important role in the vineyard soils contaminated with copper, due to these areas are usually located in steep mountains with sandy soils, subjected to erodibility, promoting high soil losses by surface runoff.…”
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.
“…Phytostabilization, another phytotechnology, uses plants to stabilize pollutants in soil, preventing erosion, leaching or runoff, or by converting pollutants to less bioavailable forms. In this process, plants act as a ground cover, reducing animal contact with contaminants present in soil (Dasgupta-Schubert et al, 2011;Pignattelli et al, 2012;Van Nevel et al, 2011).…”
Section: Phytoremediation Technologiesmentioning
confidence: 99%
“…For example, the perennial shrub Sesbania virgata is an excellent species for use in Zn contaminated soils (Branzini et al, 2012). Other plant species that are good candidates for phytostabilization are Quercus robur, Quercus petraea, Pinus sylvestris, Pseudotsuga menziesii (Van Nevel et al, 2011) and S. paradoxa .…”
Section: Phytoremediation Of Zn-contaminated Sitesmentioning
“…However, proper selection of plants is critical in phytostabilization, as the species plays a key role with respect to the metal stabilizing potential of the root system and the quantity of vegetative cover for protection of soil from the effects of wind and water 8 . Excluder tree species used elsewhere include birch (Betula pendula), black locust (Robinia pseudoacacia), oak (Quercus robur, Q. petraea), Scots pine (Pinus sylvestris), and Douglas fir (Pseudotsuga menziesii) 9 . However, few reports exist regarding the utilization of excluder tree species in Thailand.…”
Greenhouse and field experiments were conducted to evaluate the influence of three different organic amendments (cow manure, pig manure, and organic fertilizer) on the Cd phytostabilization potential of Eucalyptus camaldulensis grown on Cd-contaminated soil. The application of all amendments, particularly organic fertilizer, improved plant growth (i.e., height and biomass production) when compared to the control (Cd-contaminated soil alone), in both greenhouse and field experiments. E. camaldulensis treated with organic fertilizer experienced the greatest height (39 cm and 3.8 m) and biomass production (2.0 g and 3.3 kg) in greenhouse and field experiments, respectively. Plants grown on amended soils had lower Cd accumulation than those grown on the Cd soil alone. Among the treatments, organic fertilizer resulted in a translocation factor < 1 and a bioconcentration factor for the root (BCFR) > 1, indicating the potential of this species to stabilize Cd in the roots. The results showed that E. camaldulensis is a promising species for phytostabilization of Cd-contaminated soil. The wood of the mature tree is used in the manufacture of commercial products; given the low Cd uptake by E. camaldulensis, it is feasible to harvest the wood grown on Cd-affected soils for making paper and furniture.
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