Phytoremediation of Lead: A Review

Jagetiya, Bhagawatilal; Kumar, Sandeep

doi:10.1007/978-3-030-21638-2_10

Cited by 3 publications

(3 citation statements)

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“…The rather similar magnitudes of metal accumulation in roots and soils demonstrate that the berseem plants can survive at high concentrations of essential and/or toxic metals [21,56]. Such ability is attributed mainly to the high biomass of shallow taproot system, and on the other hand the efficiency of berseem plants to reduce metal toxicity through several detoxification mechanisms on the other hand [57,58]. The lowest root Zn content in plants grown on ADW-irrigated soils might be due to the higher pH of these soils compared with those of the two other sites.…”

Section: Berseem Plant Contamination By Ptmsmentioning

confidence: 99%

“…Generally, legumes have exclusion mechanisms (binding to root cell walls and/or chelation by root exudates) by which they can sequester PTMs in roots and hinder their transfer to the aerial parts [54,55]. Therefore, the berseem plant has been known as a good candidate for phytofiltration to prevent the leaching of toxic metals to groundwater [57,58]. On the other hand, higher TF for Cu, Pb, and Zn than the unity demonstrates that these metals could be translocated to the shoots through xylem vessels, where they are stored in vacuoles [21].…”

Section: Berseem Plant Contamination By Ptmsmentioning

confidence: 99%

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Accumulation of Potentially Toxic Metals in Egyptian Alluvial Soils, Berseem Clover (Trifolium alexandrinum L.), and Groundwater after Long-Term Wastewater Irrigation

et al. 2021

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The reduced availability of water resources in Egypt has imposed the need to intensify the use of wastewater for crop irrigation in the alluvial soils of anthropogenic origin. Relevant effects can derive from contents of potentially toxic metals (PTMs) in supply resources soils, crops, and groundwater in these areas. For this reason the PTM content has to be monitored to evaluate and minimize health hazards. Therefore, in this context, two areas of the SE Nile Delta subjected to 25 year of wastewater irrigation, using agricultural drainage water (ADW) and mixed wastewater (MWW) were chosen and compared with a nearby site irrigated with Nile freshwater (NFW). At each of the three sites, ten samples of irrigation water, topsoil, berseem clover (Trifolium alexandrinum L.) plants, and seven groundwater samples were collected and analyzed for Cr, Co, Cu, Pb, Ni, and Zn. Results indicate that the total contents of Co, Cu, Ni, and Zn in soils collected from the three sampling sites and Pb in the MWW-irrigated soils were higher than their average natural contents in the earth’s crust, indicating potential risks. The DTPA-extractable contents of Cu in the three sites, in addition to Pb and Zn in the MWW-irrigated soils, exceeded the safe limits. The MWW-irrigated soils showed a considerable degree of metal contamination, while the NFW- and ADW-irrigated soils showed moderate and low levels of contamination, respectively. The contents of the six PTMs in the three sites showed low individual ecological risks, except for Pb in the MWW-irrigated soils that showed a moderate risk; however, the overall ecological risk remained low in all samples. The values of Co, Cu, and Ni in berseem shoot in addition to Pb from the MWW-irrigated soils were over the maximum permissible levels for animal feeding. Values of root-to-shoot translocation factor were lower than 1.0 for Cr, Co and Ni but higher than 1.0 for Cu, Pb, and Zn. Berssem plant is a good candidate for phytofiltration of Cr, Co and Ni, while for extracting Cu, Pb and Zn from polluted soils. The groundwater samples collected from the three sampling sites showed lower metal concentrations than the safe limits for drinking standards. Further remediation studies should be taken into account to alleviate potential environmental and health-related risks when using supply resources different from freshwater.

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Section: Berseem Plant Contamination By Ptmsmentioning

confidence: 99%

Section: Berseem Plant Contamination By Ptmsmentioning

confidence: 99%

Accumulation of Potentially Toxic Metals in Egyptian Alluvial Soils, Berseem Clover (Trifolium alexandrinum L.), and Groundwater after Long-Term Wastewater Irrigation

et al. 2021

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“…Phytoremediation is less costly, sustainable, and eco-friendly than traditional physicochemical remediation [ 30 , 31 ], so it is a more recommended method for tailings remediation in arid and semi-arid regions because it can preserve vegetation to avoid erosion [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Heavy Metal Stress on Physiology, Hydraulics, and Anatomy of Three Desert Plants in the Jinchang Mining Area, China

Gao

Wang

et al. 2022

IJERPH

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The physiological mechanisms and phytoremediation effects of three kinds of native quinoa in a desert mining area were studied. We used two different types of local soils (native soil and tailing soil) to analyze the changes in the heavy metal content, leaf physiology, photosynthetic parameters, stem hydraulics, and anatomical characteristics of potted quinoa. The results show that the chlorophyll content, photosynthetic rate, stomatal conductance, and transpiration rate of Kochia scoparia were decreased, but intercellular CO2 concentration (Ci) was increased under heavy metal stress, and the net photosynthetic rate (Pn) was decreased due to non-stomatal limitation. The gas exchange of Chenopodium glaucum and Atriplex centralasiatica showed a decrease in Pn, stomatal conductance (Gs), and transpiration rate (E) due to stomatal limitation. The three species showed a similar change in heavy metal content; they all showed elevated hydraulic parameters, decreased vessel density, and significantly thickened vessel walls under heavy metal stress. Physiological indicators such as proline content and activity of superoxide dismutase (SOD) and peroxidase (POD) increased, but the content of malondialdehyde (MDA) and glutathione (GSH), as well as catalase (CAT) activity, decreased in these three plants. Therefore, it can be concluded that these three species of quinoa, possibly the most dominant 30 desert plants in the region, showed a good adaptability and accumulation capacity under the pressure of heavy metal stress, and these plants can be good candidates for tailings remediation in the Jinchang desert mining area.

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