Nano-Phytoremediation of Heavy Metals from Soil: A Critical Review
Abstract
:1. Introduction
2. Heavy Metals
2.1. Heavy Metal Sources and Their Global Status
2.2. Conventional Techniques for Heavy Metal Remediation
2.2.1. Physicochemical Method
2.2.2. Bioremediation
3. Nanomaterials and Phytoremediation
3.1. Nanoparticles: Advantages and Synthesis
3.1.1. Synthesis of Nanoparticles from Microbes
3.1.2. Synthesis of Nanoparticles from Plants
4. Nano-Phytoremediation for Heavy Metal Elimination
4.1. Uptake of Heavy Metals and Its Tolerance
4.2. Elimination of Arsenic
4.3. Elimination of Chromium
4.4. Elimination of Cadmium
4.5. Elimination of Lead
5. Environmental Concern
6. Conclusions and a Look toward the Future
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Heavy Metals | Sources | References |
---|---|---|
Chromium | Chemical manufacturing industry, cement production, sewage sludge, electroplating, air conditioning cooling towers, combustion of petroleum products, leather industry, and textile industry. | [9] |
Lead | Lead-based paints, other petrol-based materials, pesticides, and batteries. | [9] |
Cadmium | Volcanoes, refining of petroleum products, paint, pigment stabilization, Ni–Cd batteries, pesticides, electroplating, and poly vinyl chloride manufacturing. | [9] |
Arsenic | Industrial dust, mining activities, smelting activities, combustion of fossil fuels, arsenic pesticides, automobile exhaust, wood preservatives, and dyes. | [9,18] |
Phytotechnology | Mechanism | Pollutants |
---|---|---|
Phytoextraction | Hyperaccumulation in different parts of plants that are harvestable | Inorganic: Pb, Zn, Au, Co, Cr, Ni, Hg, Mo, Ag, Cd Radionuclides: Pb, Sr, U, Cs |
Rhizofiltration | Rhizosphere accumulation through precipitation, sorption, and concentration precipitation | Inorganics or organics: metals such as Cr, Cd, Cu, Ni, radionuclides |
Phytovolatilization | Pollutant eradication | Organic compounds, phenols, chlorinated solvents, munitions herbicides |
Phytostabilization | Sorption, precipitation, and complexation | Inorganic: Cu, As, Cr, Zn Cd, Pb |
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Prakash, P.; S, S.C. Nano-Phytoremediation of Heavy Metals from Soil: A Critical Review. Pollutants 2023, 3, 360-380. https://doi.org/10.3390/pollutants3030025
Prakash P, S SC. Nano-Phytoremediation of Heavy Metals from Soil: A Critical Review. Pollutants. 2023; 3(3):360-380. https://doi.org/10.3390/pollutants3030025
Chicago/Turabian StylePrakash, Priyanka, and Smitha Chandran S. 2023. "Nano-Phytoremediation of Heavy Metals from Soil: A Critical Review" Pollutants 3, no. 3: 360-380. https://doi.org/10.3390/pollutants3030025