A comparative study of cadmium phytoextraction by accumulator and weed species

Özdemir

Int. J. Environ. Sci. Technol.

2012

A pot experiment was conducted to investigate the influence of elemental sulfur, gypsum and chelating agent (Ethylenediaminetetraacetic acid) on copper, zinc, nickel, cadmium, chromium and lead uptake by Brassica juncea from sewage sludge. Addition of sulphur acidified the sludge, which caused the pH decrease to 5.4 with an initial pH 6.7. The shoot and root biomass were increased with sulfur addition, while decreased with Ethylenediaminetetraacetic acid addition. Applications of Ethylenediaminetetraacetic acid and sulfur resulted in a considerable increase in copper and lead concentrations in the plant. The highest root concentration of copper obtained to be 110 mg/kg dw at Ethylenediaminetetraacetic acid treatment. For sulfur treatment, lead concentrations in shoots indicated almost high concentrations 77 mg/kg, about twofold increases relative to roots (34 mg/kg). The Transportation Index of all studied metals were quite low (TI \ 0.5), whereas the Bioaccumulation Factor values were much higher, varied from 0.01 to 9.67. Furthermore, the plant showed better Bioaccumulation Factor for copper and lead metals in both shoot and root. The efficiency to remove copper and lead from sludge is high in this plant. As a result, elemental sulfur will be effective amendment for phytoextraction of heavy metals from sewage sludge.

Section: Resultsmentioning

confidence: 99%

Section: Sampling and Analysismentioning

confidence: 99%

Effect of soil amendments on phytoextraction potential of Brassica juncea growing on sewage sludge

Özdemir

Int. J. Environ. Sci. Technol.

2012

Sci. agric. (Piracicaba, Braz.)

“…The highest BI values for Zn, Cu and Mn were obtained with amaranth while Kenaf showed the highest values for Pb and B (Table 3). Usually, plants with high BI values are the best choices for phytoextraction (Ghosh and Singh, 2005).…”

Section: Resultsmentioning

confidence: 99%

Vegetable species for phytoextraction of boron, copper, lead, manganese and zinc from contaminated soil

Santos

Rodella²,

Abreu

et al. 2010

Phytoremediation is an attractive option to remove metal from contaminated soil since it is a simple, low-cost, and environmentally friendly procedure. To better examine the phytoremediation potential of kenaf (Hybiscus canabinnus), mustard (Brassica juncea), turnip (Raphunus sativus) and amaranth (Amaranthus crentus) plants, a greenhouse experiment was performed in which these species were grown on a soil contaminated with Zn, Cu, Mn, Pb and B. The translocation, the bioconcentration and the removal index, the transference factor and the time to reach 50% of element removal from soil, among other indicators, were used in order to identify a hyperaccumulator. Kenaf plants were more tolerant to the conditions tested, with the highest dry matter production and no visual toxicity symptoms. Amaranth would be the species chosen to remediate the soil under field conditions as it presented the higher indexes for decontamination of Zn and Mn and was also able to remove B. Turnip showed the best results for Pb removal. All species tested were able to remove B from soil. In spite, none of the plant species tested could be characterized as a hyperaccumulator.

“…Con los valores de suelo y planta se realizaron los cálculos para determinar el factor de bioconcentración (BCF), que indica la capacidad o eficiencia que poseen las plantas para acumular metales pesados en la raíz con relación a la concentración de metales existente en el suelo o sustrato, calculándose en base a peso seco (21,22) ; y el factor de translocación (TF) que indica la absorción de metales pesados que ejercen las plantas a los diferentes órganos vegetativos con respecto a la raíz (23,24,25) . Ambos factores se calcularon siguiendo las siguientes ecuaciones, las cuales han sido utilizadas por varios autores (26)(27)(28)(29) :…”

Section: Factor De Bioconcentración (Bcf) Y Factor De Translocación (Tf)unclassified

Metales pesados en leche de vacas alimentadas con alfalfa producida en suelos irrigados con aguas residuales en Puebla y Tlaxcala, México

Castro-González

Moreno-Rojas

Sánchez

et al. 2018

Rev. Mex. Cienc. Pecu.