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Evaluation of Ricinus communis L. for the Phytoremediation of Polluted Soil with Organochlorine Pesticides.

Rissato SR, Galhiane MS, Fernandes JR, Gerenutti M, Gomes HM, Ribeiro R, de Almeida MV - Biomed Res Int (2015)

Bottom Line: The contaminants tested were hexachlorocyclohexane (HCH), DDT, heptachlor, aldrin, and others.Measurements made in rhizosphere soil indicate that the roots of the studied species reduce the concentration of pesticides.Results obtained during this study indicated that the higher the hydrophobicity of the organic compound and its molecular interaction with soil or root matrix the greater its tendency to concentrate in root tissues and the research showed the following trend: HCHs < diclofop-methyl < chlorpyrifos < methoxychlor < heptachlor epoxide < endrin < o,p'-DDE < heptachlor < dieldrin < aldrin < o,p'-DDT < p,p'-DDT by increasing order of log K ow values.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Paulista State University (UNESP), CP 473, 17033-360 Bauru, SP, Brazil ; Department of Physics, Federal University of São Carlos (UFSCar), 13565-905 São Carlos, SP, Brazil.

ABSTRACT
Phytoremediation is an attractive alternative to conventional treatments of soil due to advantages such as low cost, large application areas, and the possibility of in situ treatment. This study presents the assessment of phytoremediation processes conducted under controlled experimental conditions to evaluate the ability of Ricinus communis L., tropical plant species, to promote the degradation of 15 persistent organic pollutants (POPs), in a 66-day period. The contaminants tested were hexachlorocyclohexane (HCH), DDT, heptachlor, aldrin, and others. Measurements made in rhizosphere soil indicate that the roots of the studied species reduce the concentration of pesticides. Results obtained during this study indicated that the higher the hydrophobicity of the organic compound and its molecular interaction with soil or root matrix the greater its tendency to concentrate in root tissues and the research showed the following trend: HCHs < diclofop-methyl < chlorpyrifos < methoxychlor < heptachlor epoxide < endrin < o,p'-DDE < heptachlor < dieldrin < aldrin < o,p'-DDT < p,p'-DDT by increasing order of log K ow values. The experimental results confirm the importance of vegetation in removing pollutants, obtaining remediation from 25% to 70%, and demonstrated that Ricinus communis L. can be used for the phytoremediation of such compounds.

No MeSH data available.


Related in: MedlinePlus

Distribution of pesticides obtained by experiment of phytoremediation using Ricinus communis L. in contaminated soil at 1.0 μg g−1 (T1) and 2.0 μg g−1 (T2) after 66 days.
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fig1: Distribution of pesticides obtained by experiment of phytoremediation using Ricinus communis L. in contaminated soil at 1.0 μg g−1 (T1) and 2.0 μg g−1 (T2) after 66 days.

Mentions: In this work Ricinus communis L. showed high uptake of OCPs in contaminated soil. The results obtained at different concentrations of POPs (T1 and T2) were similar for most of the compounds studied (above 40%). However, for compounds aldrin and DDTs/DDE, remediation results observed were of 24.28–27.22% and 35.8–38.3%/28.33–30.29%, respectively. The results showed in Figure 1 were based on the found residues in the contaminated soil samples in relation to control samples (no plants) in T1 (1.0 μg g−1) and T2 (2.0 μg g−1) treatments after 66 days. The remediation in the presence of growing Ricinus communis L. showed restoration results of 24.28 to 68.33% in the T1 treatment and 27.33 to 69.01% in the T2 treatment (Figure 1).


Evaluation of Ricinus communis L. for the Phytoremediation of Polluted Soil with Organochlorine Pesticides.

Rissato SR, Galhiane MS, Fernandes JR, Gerenutti M, Gomes HM, Ribeiro R, de Almeida MV - Biomed Res Int (2015)

Distribution of pesticides obtained by experiment of phytoremediation using Ricinus communis L. in contaminated soil at 1.0 μg g−1 (T1) and 2.0 μg g−1 (T2) after 66 days.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4537713&req=5

fig1: Distribution of pesticides obtained by experiment of phytoremediation using Ricinus communis L. in contaminated soil at 1.0 μg g−1 (T1) and 2.0 μg g−1 (T2) after 66 days.
Mentions: In this work Ricinus communis L. showed high uptake of OCPs in contaminated soil. The results obtained at different concentrations of POPs (T1 and T2) were similar for most of the compounds studied (above 40%). However, for compounds aldrin and DDTs/DDE, remediation results observed were of 24.28–27.22% and 35.8–38.3%/28.33–30.29%, respectively. The results showed in Figure 1 were based on the found residues in the contaminated soil samples in relation to control samples (no plants) in T1 (1.0 μg g−1) and T2 (2.0 μg g−1) treatments after 66 days. The remediation in the presence of growing Ricinus communis L. showed restoration results of 24.28 to 68.33% in the T1 treatment and 27.33 to 69.01% in the T2 treatment (Figure 1).

Bottom Line: The contaminants tested were hexachlorocyclohexane (HCH), DDT, heptachlor, aldrin, and others.Measurements made in rhizosphere soil indicate that the roots of the studied species reduce the concentration of pesticides.Results obtained during this study indicated that the higher the hydrophobicity of the organic compound and its molecular interaction with soil or root matrix the greater its tendency to concentrate in root tissues and the research showed the following trend: HCHs < diclofop-methyl < chlorpyrifos < methoxychlor < heptachlor epoxide < endrin < o,p'-DDE < heptachlor < dieldrin < aldrin < o,p'-DDT < p,p'-DDT by increasing order of log K ow values.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Paulista State University (UNESP), CP 473, 17033-360 Bauru, SP, Brazil ; Department of Physics, Federal University of São Carlos (UFSCar), 13565-905 São Carlos, SP, Brazil.

ABSTRACT
Phytoremediation is an attractive alternative to conventional treatments of soil due to advantages such as low cost, large application areas, and the possibility of in situ treatment. This study presents the assessment of phytoremediation processes conducted under controlled experimental conditions to evaluate the ability of Ricinus communis L., tropical plant species, to promote the degradation of 15 persistent organic pollutants (POPs), in a 66-day period. The contaminants tested were hexachlorocyclohexane (HCH), DDT, heptachlor, aldrin, and others. Measurements made in rhizosphere soil indicate that the roots of the studied species reduce the concentration of pesticides. Results obtained during this study indicated that the higher the hydrophobicity of the organic compound and its molecular interaction with soil or root matrix the greater its tendency to concentrate in root tissues and the research showed the following trend: HCHs < diclofop-methyl < chlorpyrifos < methoxychlor < heptachlor epoxide < endrin < o,p'-DDE < heptachlor < dieldrin < aldrin < o,p'-DDT < p,p'-DDT by increasing order of log K ow values. The experimental results confirm the importance of vegetation in removing pollutants, obtaining remediation from 25% to 70%, and demonstrated that Ricinus communis L. can be used for the phytoremediation of such compounds.

No MeSH data available.


Related in: MedlinePlus