Assisting Phytoremediation of Heavy Metals Using Chemical Amendments

Hasan, Md. Mahadi; Uddin, Md. Nashir; Ara-Sharmeen, Iffat; Alharby, Hesham F.; Alzahrani, Yahya; Hakeem, Khalid Rehman; Zhang, Li

doi:10.3390/plants8090295

Cited by 100 publications

(60 citation statements)

References 95 publications

(114 reference statements)

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“…Several investigations have been carried out on EDTA as a heavy metals chelator from polluted water and soils for effective phytoextraction [204,206,207]. In several studies, it has been reported that the application of EDTA in contaminated soils leads to elevated Cd accumulation in the aerial parts of plants [207,208].…”

Section: Chelate-assisted Cadmium Phytoremediationmentioning

confidence: 99%

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

177

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Cadmium (Cd) is one of the most toxic metals in the environment, and has noxious effects on plant growth and production. Cd-accumulating plants showed reduced growth and productivity. Therefore, remediation of this non-essential and toxic pollutant is a prerequisite. Plant-based phytoremediation methodology is considered as one a secure, environmentally friendly, and cost-effective approach for toxic metal remediation. Phytoremediating plants transport and accumulate Cd inside their roots, shoots, leaves, and vacuoles. Phytoremediation of Cd-contaminated sites through hyperaccumulator plants proves a ground-breaking and profitable choice to combat the contaminants. Moreover, the efficiency of Cd phytoremediation and Cd bioavailability can be improved by using plant growth-promoting bacteria (PGPB). Emerging modern molecular technologies have augmented our insight into the metabolic processes involved in Cd tolerance in regular cultivated crops and hyperaccumulator plants. Plants’ development via genetic engineering tools, like enhanced metal uptake, metal transport, Cd accumulation, and the overall Cd tolerance, unlocks new directions for phytoremediation. In this review, we outline the physiological, biochemical, and molecular mechanisms involved in Cd phytoremediation. Further, a focus on the potential of omics and genetic engineering strategies has been documented for the efficient remediation of a Cd-contaminated environment.

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Section: Chelate-assisted Cadmium Phytoremediationmentioning

confidence: 99%

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Raza

Habib

Najafi-Kakavand

et al. 2020

Biology

177

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“…It has been demonstrated that in superior plants, different phytoremediation routes are presented, although the time used to phytoremediate polluted soils normally becomes longer due to the slow growth of most of the species [122]; these aspects need to be dealt with to convert this environmental biotechnology into a more attractive and affordable option. Studies are being implemented to turn this drawback into opportunities; for example, Pilipović et al [123] reported long-term poplar phytoremediation in which biomass productivity and carbon storage during a rotation of Populus deltoides Bartr.…”

Section: Liquid Biofuelsmentioning

confidence: 99%

Coupling Plant Biomass Derived from Phytoremediation of Potential Toxic-Metal-Polluted Soils to Bioenergy Production and High-Value by-Products—A Review

et al. 2021

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Phytoremediation is an attractive strategy for cleaning soils polluted with a wide spectrum of organic and inorganic toxic compounds. Among these pollutants, heavy metals have attracted global attention due to their negative effects on human health and terrestrial ecosystems. As a result of this, numerous studies have been carried out to elucidate the mechanisms involved in removal processes. These studies have employed many plant species that might be used for phytoremediation and the obtention of end bioproducts such as biofuels and biogas useful in combustion and heating. Phytotechnologies represent an attractive segment that is increasingly gaining attention worldwide due to their versatility, economic profitability, and environmental co-benefits such as erosion control and soil quality and functionality improvement. In this review, the process of valorizing biomass from phytoremediation is described; in addition, relevant experiments where polluted biomass is used as feedstock or bioenergy is produced via thermo- and biochemical conversion are analyzed. Besides, pretreatments of biomass to increase yields and treatments to control the transfer of metals to the environment are also mentioned. Finally, aspects related to the feasibility, benefits, risks, and gaps of converting toxic-metal-polluted biomass are discussed.

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“…Soil is the main source of contamination, where from heavy metals can move to the surface of the roots by diffusion or ion exchange between the surface of the root and soil-water. Plants use active absorption to assimilate essential metals, but they can also take up other toxic elements available in the soil (Figure 1) [51]. At the same time, heavy metals can move through cationic channels in the cell membrane inside the cell [16,52,53].…”

Section: Interactions Between Soil Heavy Metals and Medicinal Plantsmentioning

confidence: 99%

“…Sources of heavy metals, and foliar, root uptake of heavy metals in plants (from Hasan et al[51], according to the provisions MDPI "This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited") Metals-plants interactions during metal transport from polluted medium to plant https://doi.org/10.37358/RC.20.7.8222…”

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confidence: 99%

Heavy Metal Contamination of Medicinal Plants and Potential Implications on Human Health

Asiminicesei¹,

Vasilachi²

2020

Rev. Chim.

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This survey focuses on the problem of medicinal plants contamination due to environmental pollution produced by many different industrial activities and atmospheric deposition of some toxic compounds. This analysis is important since plants can easily absorb organic and inorganic compounds from all environmental compartments (water, soil, air), which can enter and be transferred in the trophic chain, up to humans. Medicinal plants are relevant for study in relation with their interactions with different contaminants, in particular those inorganic persistent as heavy metals, because they are used in entire world for their beneficial properties, and represent a significant part of traditional medicine. According to World Health Organization (WHO), 65-80% of world`s population depends on herbal products as the primary form of health care. Frequent use of medicinal plants to improve health, in the context of current pollution, requires special attention, since they can contain heavy metals in their structures, which can generate hazards and risks on human health throughout the subsequent consumption of contaminated medicinal plants as teas, other drinks, cosmetics.

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Assisting Phytoremediation of Heavy Metals Using Chemical Amendments

Cited by 100 publications

References 95 publications

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular Mechanisms

Coupling Plant Biomass Derived from Phytoremediation of Potential Toxic-Metal-Polluted Soils to Bioenergy Production and High-Value by-Products—A Review

Heavy Metal Contamination of Medicinal Plants and Potential Implications on Human Health

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