Abstract
Lead is a hazardous heavy metal released extensively in the environment through natural and anthropogenic sources and is toxic to terrestrial life. The presence of lead in terrestrial ecosystem raises concerns about human health due to edible safety of the cultivated crops or vegetables, and remediation of such soils is therefore essential. As a green and cost-effective alternative, plants have been used to remediate such soils in a number of ways including phytoextraction, phytostabilization, rhizofiltration, phytotransformation and phytovolatilization. The effectiveness of these plant-based approaches as well as the efficacy of different metal-chelating organic ligands of both synthetic and natural origins for the management of lead-contaminated soils is discussed at length in this review. Furthermore, numerous recent reports are incorporated in tabulated form and areas of potential focus have been highlighted that not only signify the success of such studies in the past but also pave the way for future efforts.
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Abbreviations
- HM:
-
Heavy metal
- Pb:
-
Lead
- Cd:
-
Cadmium
- Cr:
-
Chromium
- Hg:
-
Mercury
- Sb:
-
Antimony
- Ag:
-
Silver
- Ni:
-
Nickel
- As:
-
Arsenic
- Ca:
-
Calcium
- Zn:
-
Zinc
- PbS:
-
Lead sulfide
- PbSO4 :
-
Lead sulfate
- PbSiO3 :
-
Lead silicate
- Pb3O4 :
-
Lead oxide
- PbCO3 :
-
Lead carbonate
- ROS:
-
Reactive oxygen species
- SOD:
-
Superoxide dismutase
- CAT:
-
Catalase
- POD:
-
Peroxidase
- APX:
-
Ascorbate peroxidase
- GR:
-
Glutathione reductase
- EDTA:
-
Ethylenediaminetetraacetic acid
- EGTA:
-
Ethylene glycol-bis(β-aminoethyl ether)-N,N,N′,N′-tetraacetic acid
- EDDS:
-
Ethylenediamine-N,N′-disuccinic acid
- DTPA:
-
Diethylenetriaminepentaacetic acid
- NTA:
-
Nitrilotriacetic acid
- LMWOA:
-
Low-molecular-weight organic acids
- CA:
-
Citric acid
- MA:
-
Malic acid
- TA:
-
Tartaric acid
- OA:
-
Oxalic acid
- FW:
-
Fresh weight
- DW:
-
Dry weight
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Khan, I., Iqbal, M. & Shafiq, F. Phytomanagement of lead-contaminated soils: critical review of new trends and future prospects. Int. J. Environ. Sci. Technol. 16, 6473–6488 (2019). https://doi.org/10.1007/s13762-019-02431-2
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DOI: https://doi.org/10.1007/s13762-019-02431-2