Metal Hyperaccumulation in Plants: A Review Focusing on Phytoremediation Technology

Sarma, Hemen

doi:10.3923/jest.2011.118.138

Cited by 428 publications

(184 citation statements)

References 38 publications

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“…Among them, a few Brassicaceae have been described as PTE hyperaccumulators (Sarma, 2011). However, their low biomass and slow growth rate diminish their potential use in phytoremediation (Ghosh and Singh, 2005).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Lebrun

Macri

Miard

et al. 2017

Journal of Geochemical Exploration

100

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To cite this version:Manhattan Lebrun, Carmelo Macri, Florie Miard, Nour Hattab-Hambli, Mikael Motelica-Heino, et al.. Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix. Journal of Geochemical Exploration, Elsevier, 2017Elsevier, , 182, pp.149-156. <10.1016Elsevier, /j.gexplo.2016 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Mining activities lead to widespread environmental pollution of terrestrial ecosystems due to the presence of metal(loid)s in tailings. These contaminated areas present a health risk and hence need to be rehabilitated. Ex situ methods for soil remediation have been used for a long time but are expensive and disruptive to soil. Phytoremediation techniques for the stabilization or extraction of metal(loid)s could be an efficient alternative as they provide a low-cost and environmentally friendly option. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTHowever, due to the often poor nutrient content of these contaminated soils, amendments must be added to enhance plant growth and to improve phytoremediation efficiency. Biochar, a pyrogenic product, is a promising amendment for assisted phytoremediation. The aims of our study were (i) to evaluate the effect of a pinewood biochar on the physicochemical properties of a former mine contaminated technosol, (ii) to assess the mobility and phytoavailability of As and Pb and (iii) to investigate the remediation potential of three willow species (Salix alba, Salix viminalis and Salix purpurea). A greenhouse experiment was conducted with contaminated technosols amended with biochar and garden soil, single or combined, revegetated with the 3 willow species. The physicochemical properties of soil pore water (SPW) as well as metal(loid) concentrations were determined. Plant growth, Salix organ dry weight and metal(loid) uptake were determined in order to evaluate the phytoremediation potential of the three Salix species studied. Biochar increased the pH and electrical conductivity of SPW. Biochar addition had no effect on As mobility but decreased SPW Pb concentration by 70%. For the three Salix species investigated, biochar addition to the polluted soil induced a better growth and a higher dry weight production. In most modalities tested, the metal(loid)A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTcontent in the Salix organs increased due to the biochar application. Globally, a positive effect of biochar was noticed on the soil qualities (pH and electrical conductivity increase) and plant growth.Metal(loid)s were mostly confined to the roots. Amon...

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Section: Accepted M Manuscriptmentioning

confidence: 99%

Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Lebrun

Macri

Miard

et al. 2017

Journal of Geochemical Exploration

100

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“…When bioremediation occurs on its own, it is known as natural attenuation; when it involves microorganisms along with added fertilizers, it is called biostimulation; when degradation takes place in the rhizosphere, it is known as rhizodegradation; when plants extract metals from soil and release them into the atmosphere by volatilization, it is known as phytovolatilization; when plant roots absorb or adsorb metals from aqueous solution, it is known as rhizofiltration; when seedlings absorb or adsorb pollutants from aqueous solution, it is known as blastofiltration; and when the pollutant is being immobilized in the root zone, it is known as phytostabilization. The combined rhizospheric (root zone) processes contributing to bioremediation have been termed as rhizoremediation (Prasad and Freitas 2003;Sarma 2011;Dhankher et al 2011). Parallel utilization of different pollutants due to their flexible degradative capacity with microbial community is known as co-metabolism.…”

Section: Strategies For Bioremediationmentioning

confidence: 99%

Biotechnological advances in bioremediation of heavy metals contaminated ecosystems: an overview with special reference to phytoremediation

Mani

Kumar

2013

Int. J. Environ. Sci. Technol.

513

137

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The ability of heavy metals bioaccumulation to cause toxicity in biological systems-human, animals, microorganisms and plants-is an important issue for environmental health and safety. Recent biotechnological approaches for bioremediation include biomineralization (mineral synthesis by living organisms or biomaterials), biosorption (dead microbial and renewable agricultural biomass), phytostabilization (immobilization in plant roots), hyperaccumulation (exceptional metal concentration in plant shoots), dendroremediation (growing trees in polluted soils), biostimulation (stimulating living microbial population), rhizoremediation (plant and microbe), mycoremediation (stimulating living fungi/mycelial ultrafiltration), cyanoremediation (stimulating algal mass for remediation) and genoremediation (stimulating gene for remediation process). The adequate restoration of the environment requires cooperation, integration and assimilation of such biotechnological advances along with traditional and ethical wisdom to unravel the mystery of nature in the emerging field of bioremediation. This review highlights better understanding of the problems associated with the toxicity of heavy metals to the contaminated ecosystems and their viable, sustainable and eco-friendly bioremediation technologies, especially the mechanisms of phytoremediation of heavy metals along with some case studies in India and abroad. However, the challenges (biosafety assessment and genetic pollution) involved in adopting the new initiatives for cleaning-up the heavy metals-contaminated ecosystems from both ecological and greener point of view must not be ignored.

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“…The level of toxic metals (Pb, Cr, Hg etc) can be reduced from contaminated water by a number of aquatic plants taken up by the roots system and transported to the stems and leaves without showing toxicity syndrome has confirmed by many studies (Rai et al, 1995;Cardwell et al, 2002;Abidal and Harikrishna 2010;Sarma, 2011). Maximum accumulation of Cu, Fe, Cr, Pb and Zn was recorded in Eichornia crassipes where as Mn was observed maximum in Pistia stratiotes.…”

Section: (L) and Lemna Spp (L)mentioning

confidence: 70%

“…But in recent years unscientific management and use of this resources for various purpose almost invariably has created undesirable problems in its wake, water logging and salinity in the case of agriculture use and environment pollution of various limits as a result of mining, industries and municipal use (Rai and Pal, 2001;Kumar et al, 2008;Kumar and Pal, 2011). Phytoremediation, an emerging cleanup technology for contaminated groundwater and wastewater that is both low-tech and low-cost, is defined as the engineered use of green plants (including grasses, forbs, and woody species) to remove, contain, or render harmless such environmental contaminants as heavy metals, trace elements, organic compounds and radioactive compounds in any aquatic systems (Kumar and Pal, 2011;Sarma, 2011;Singh et al, 2012). Macrophytes are considered as important component of the aquatic ecosystem not only as food source for aquatic invertebrates, but also act as an efficient accumulator of heavy metals (Devlin, 1967;Chung and Jeng, 1974;Rahman and Hasegawa, 2011;Ndimele and Jimoh, 2011;Pant et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Remediation of Heavy Metals through Aquatic Macrophytes from Water Bodies of Bundelkhand Region of Uttar Pradesh

Sharma

Zaidi

Pal

2014

Journal of Ecophysiology and Occupational Health

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Metal Hyperaccumulation in Plants: A Review Focusing on Phytoremediation Technology

Cited by 428 publications

References 38 publications

Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Biotechnological advances in bioremediation of heavy metals contaminated ecosystems: an overview with special reference to phytoremediation

Remediation of Heavy Metals through Aquatic Macrophytes from Water Bodies of Bundelkhand Region of Uttar Pradesh

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