Improving Metal Hyperaccumulator Wild Plants to Develop Commercial Phytoextraction Systems

Chaney, Rufus L.; Li, Yin-Ming; Brown, Sally; Homer, Faye A.; Malik, Minnie; Angle, J. S.; Baker, A. J. M.; Reeves, Roger D.; Chin, Mel

doi:10.1201/9781439822654.ch7

Cited by 66 publications

(88 citation statements)

References 58 publications

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“…Hyperaccumulator plants can assimilate large concentrations of metals from contaminated soils (Brooks, 1998 and, ultimately, may provide the basis for viable ' phytoremediation ' strategies (Chaney, 1983 ;McGrath et al, 1993 ;Baker et al, 2000 ;Chaney et al, 2000). However, the factors that control the uptake of metals by hyperaccumulator plants are still unclear.…”

Section: mentioning

confidence: 99%

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Determining uptake of ‘non‐labile’ soil cadmium by Thlaspi caerulescens using isotopic dilution techniques

et al. 2000

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We assessed the ability of several populations of the metal-hyperaccumulator species, Thlaspi caerulescens, to mobilize non-labile cadmium in soils historically contaminated by Pb\Zn mine spoil or sewage sludge. . This suggests that, in the soils studied, T. caerulescens did not mobilize non-labile soil Cd by producing root exudates or altering rhizosphere pH. The results imply that there may be significant restrictions to metal bioavailability, even to hyperaccumulator species, in heavily contaminated soils in which a large proportion of the metal may be present in ' non-labile ' forms.

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Section: mentioning

confidence: 99%

“…These are particularly important considerations for phytoremediation strategies based on hyperaccumulators, which do not rely on the addition of chelating agents to soil to mobilize metals (Chaney et al, 2000).…”

Section: mentioning

confidence: 99%

Determining uptake of ‘non‐labile’ soil cadmium by Thlaspi caerulescens using isotopic dilution techniques

et al. 2000

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“…Human disease has resulted from Cd (Nogawa et al, 1987;Kobayashi, 1978;Cai et al, 1990), Se (Yang et al, 1983), and Pb in soil (Chaney et al, 1999). Livestock and wildlife have suffered from…”

Section: Risk Assessmentmentioning

confidence: 99%

Phytoextraction of Metals from Contaminated Soil: A Review of Plant/Soil/Metal Interaction and Assessment of Pertinent Agronomic Issues

Lasat¹

1999

Journal of Hazardous Substance Research

240

201

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Phytoremediation is an emerging technology that employs the use of higher plants for the cleanup of contaminated environments. Fundamental and applied research have unequivocally demonstrated that selected plant species possess the genetic potential to remove, degrade, metabolize, or immobilize a wide range of contaminants. Despite this tremendous potential, phytoremediation is yet to become a commercial technology. Progress in the field is precluded by limited knowledge of basic plant remedial mechanisms. In addition, the effect of agronomic practices on these mechanisms is poorly understood. Another limitation lies within the very biological nature of this novel approach. For example, potential for phytoremediation depends upon the interaction among soil, contaminants, microbes, and plants. This complex interaction, affected by a variety of factors, such as climatic conditions, soil properties, and site hydro-geology, argues against generalization, and in favor of site-specific phytoremediating practices. Thus, an understanding of the basic plant mechanisms and the effect of agronomic practices on plant/soil/contaminant interaction would allow practitioners to optimize phytoremediation by customizing the process to site-specific conditions.Remediation of metal-contaminated soil faces a particular challenge. Unlike organic contaminants, metals cannot be degraded. Commonly, decontamination of metal-contaminated soils requires the removal of toxic metals. Recently, phytoextraction, the use of plants to extract toxic metals from contaminated soils, has emerged as a cost-effective, environment-friendly cleanup alternative. In this paper, we review the processes and mechanisms that allow plants to remove metals from contaminated soils and discuss the effects of agronomic practices on these processes.

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“…Significant research has been conducted on phytoremediation for metalsorption capacity (US EPA, 2000;Meagher, 2000;Mitch, 2002;Glick, 2003;Pulford and Watson, 2003). A series of fascinating scientific discoveries combined with an interdisciplinary research approach has allowed the development of this idea into a promising, low-cost and environmentally friendly technology (Chaney et al 1997(Chaney et al , 2000Baker et al, 1991;Eapen and Dsouza, 2005;Krämer 2005). Phytoremediation can be applied to both organic and inorganic pollutants, present in soil substrates (e.g.…”

Section: Introductionmentioning

confidence: 99%

Determination of Phytoremediation Potential of Desert Broom Grown in a Mine Tailings Reclamation Project

Haque

Peralta-Videa

Jones

et al. 2007

JASMR

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This research was conducted out at a copper mine tailings reclamation project (CMTRP ) located in the Globe-Miami mining district near Claypool, AZ, USA. Desert broom (Baccharis sarothroides) is a very environmentally friendly and available plant that might have phytoremediation potential, grows at the CMTRP. Therefore, in this research metal concentrations both in the tailings and plants (elemental ratio from soil to plant) were investigated. The metal concentrations in the soil cover and tailings were determined using ICP-OES. Based on the concentration, the elements were classified as high level elements

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Improving Metal Hyperaccumulator Wild Plants to Develop Commercial Phytoextraction Systems

Cited by 66 publications

References 58 publications

Determining uptake of ‘non‐labile’ soil cadmium by Thlaspi caerulescens using isotopic dilution techniques

Determining uptake of ‘non‐labile’ soil cadmium by Thlaspi caerulescens using isotopic dilution techniques

Phytoextraction of Metals from Contaminated Soil: A Review of Plant/Soil/Metal Interaction and Assessment of Pertinent Agronomic Issues

Determination of Phytoremediation Potential of Desert Broom Grown in a Mine Tailings Reclamation Project

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