EDTA-Enhanced Phytoremediation of Heavy Metals: A Review

Shahid, Muhammad; Austruy, Annabelle; Echevarria, Guillaume; Arshad, Muhammad; Sanaullah, Muhammad; Aslam, Muhammad; Nadeem, Muhammad; Nasim, Wajid; Dumat, Camille

doi:10.1080/15320383.2014.831029

Cited by 196 publications

(104 citation statements)

References 181 publications

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“…Indeed, the type of metal(loid) and soil physico-chemical properties as well as organism physiology can affect metal(loid) bioaccumulation (Lanno et al, 2004;Ardestani and Van Gestel, 2013). Likewise, metal bioavailability is mainly influenced by soil pH and the amount of soil organic matter (Levêque et al, 2013) or by the presence of various ligands in the soil solution (Shahid et al, 2014). Metal bioaccumulation in microarthropods could therefore be a relevant measure of metal bioavailability and thus of the overall soil ecotoxicity.…”

Section: Introductionmentioning

confidence: 99%

Ecological changes in historically polluted soils: Metal(loid) bioaccumulation in microarthropods and their impact on community structure

Austruy¹,

Laplanche

Mombo

et al. 2016

Geoderma

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 15976 a b s t r a c tSoil pollution by persistent metal(loid)s present environmental and sanitary risks. While the effects of metal(loid)s on vegetation and macrofauna have been widely studied, their impact on microarthropods (millimetre scale) and their bioaccumulation capacity have been less investigated. However, microarthropods provide important ecosystem services, contributing in particular to soil organic matter dynamics. This study focussed on the impact of metal(loid) pollution on the structure and distribution of microarthropod communities and their potential to bioaccumulate lead (Pb). Soil samples were collected from a contaminated historical site with a strong horizontal and vertical gradient of Pb concentrations. Microarthropods were extracted using the Berlese method. The field experiments showed that microarthropods were present even in extremely polluted soils (30,000 mg Pb kg −1 ). However, while microarthropod abundance increased with increasing soil C/N content (R 2 = 0.79), richness decreased with increasing pollution. A shift in the community structure from an oribatid-to a springtail-dominated community was observed in less polluted soils (R 2 = 0.68). In addition, Pb bioamplification occurred in microarthropods, with higher Pb concentrations in predators than in detritivorous microarthropods. Finally, the importance of feeding and reproductive ecological traits as potentially relevant descriptors of springtail community structures was highlighted. This study demonstrates the interest of microarthropod communities with different trophic levels and ecological features for evaluating the global environmental impact of metal(loid) pollution on soil biological quality.

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Section: Introductionmentioning

confidence: 99%

Ecological changes in historically polluted soils: Metal(loid) bioaccumulation in microarthropods and their impact on community structure

Austruy¹,

Laplanche

Mombo

et al. 2016

Geoderma

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“…Metals are known to form complexes (both soluble and insoluble) with organic component in soils (Shahid et al, 2014e). Formation of metal-organic matter complexes apparently depends on the type and nature of the organic matter (Shahid et al, 2014e). Organic constituents of soil have a high affinity for metal(loid)s due to high binding constants of metal ions with phenolic hydroxyl and carboxylic (COOH) groups of dissolved organic matter (Shahid et al, 2012a).…”

Section: Immobilization Techniquesmentioning

confidence: 99%

“…Other components are extractives, hemicellulose, proteins, lipids, starches, simple sugars, hydrocarbons, and many other compounds that contain a number of functional groups such as carbonyl, phenolic, acetamido groups, amido, amino, structural polysaccharides and esters (Niazi et al, 2016a) having high affinity for metal complexation. Metals are known to form complexes (both soluble and insoluble) with organic component in soils (Shahid et al, 2014e). Formation of metal-organic matter complexes apparently depends on the type and nature of the organic matter (Shahid et al, 2014e).…”

Section: Immobilization Techniquesmentioning

confidence: 99%

“…EDTA is known to enhance heavy metal(-loid)s uptake from the soil to N1% of shoot dry biomass (Shahid et al, 2014c). Several factors are involved in EDTA-assisted enhanced uptake of heavy metal(loid)s by plants which include (i) enhanced phytoavailable metal concentration in soil, (ii) increased movement of metal-EDTA complex towards plant root, (iii) destruction of physiological barriers in roots by EDTA, (iv) limited binding between metal-EDTA complex and the negatively charged cell walls, and (v) enhanced xylem loading and transfer of metal-EDTA complex towards aerial parts (Saifullah et al, 2009;Shahid et al, 2014e). Recently, Cay et al (2016) reported EDTA enhanced Cd phytoextaction by four ornamental plant species such as Lonicera japonica, Althaea rosea, Dahlia hybrida and Salvia virgata growing in the natural vegetation of Black Sea RegionTurkey.…”

Section: Phytoextraction By Genetically Modified Plantsmentioning

confidence: 99%

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A comparison of technologies for remediation of heavy metal contaminated soils

Khalid

Shahid

Niazi

et al. 2017

Journal of Geochemical Exploration

1,020

349

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, et al.. A comparison of technologies for remediation of heavy metal contaminated soils. Journal of Geochemical Exploration, Elsevier, 2016Elsevier, , 182, pp.247 -268. 10.1016Elsevier, /j.gexplo.2016 Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@listes-diff.inp-toulouse.fr a b s t r a c tSoil contamination with persistent and potentially (eco)toxic heavy metal(loid)s is ubiquitous around the globe. Concentration of these heavy metal(loid)s in soil has increased drastically over the last three decades, thus posing risk to the environment and human health. Some technologies have long been in use to remediate the hazardous heavy metal(loid)s. Conventional remediation methods for heavy metal(loid)s are generally based on physical, chemical and biological approaches, which may be used in combination with one another to clean-up heavy metal(loid) contaminated soils to an acceptable and safe level. This review summarizes the soil contamination by heavy metal(loid)s at a global scale, accumulation of heavy metal(loid)s in vegetables to toxic levels and their regulatory guidelines in soil. In this review, we also elucidate and compare the pool of available technologies that are currently being applied for remediation of heavy metal(loid) contaminated soils, as well as the economic aspect of soil remediation for different techniques. This review article includes an assessment of the contemporary status of technology deployment and recommendations for future remediation research. Finally, the molecular and genetic basis of heavy metal(loid) (hyper)accumulation and tolerance in microbes and plants is also discussed. It is proposed that for effective and economic remediation of soil, a better understanding of remediation procedures and the various options available at the different stages of remediation is highly necessary.

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“…These contaminants cannot be mineralized or changed to less toxic forms. Thus, it requires suitable methods for their elimination (Mojiri et al, 2013;Chen et al, 2014;Shahid et al, 2014;Saad-Allah and Elhaak, 2015). Techniques that are commonly used to remediate the contaminated sites include removal of heavy metals by leaching with chelating agents or metal stabilization using soil amendments (Saifullah et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Lead phytoremediation capacity of Puccinellia distans (Jacq.) Parl. using EDTA and DTPA and associated potential leaching risk

2017

Global NEST Journal

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This study was conducted to determine phytoextraction efficiency of Puccinellia distans (Jacq.) Parl. for Pb (450 mg kg -1 Pb(NO3)2) and the application of EDTA and DTPA (2.5DTPA, 5DTPA, 2.5EDTA, 5EDTA, 2.5EDTA+2.5DTPA, 2.5EDTA+5DTPA, 5EDTA+2.5DTPA, 5EDTA+5DTPA) on the Pb uptake and the potential for leaching of Pb during the phytoextraction process. Bioconcentration factor (BCF), translocation factor (TF) and tolerance index (TI) were calculated to determine Pb phytoextraction efficiency. Results showed that DTPA appeared to be more toxic to the plant than EDTA. Plants with combined treatments of EDTA and DTPA exhibited higher decrease in biomass compared to those that had received a treatment of EDTA and DTPA alone. 5DTPA and 5EDTA were the most efficient ratio for increasing concentrations of Pb in the shoots. DTPA showed much higher efficiency than EDTA. BCF of the shoot was relatively higher than the BCF of root. Thus, the plant would be applicable for Pb phytoextraction. Addition of chelates had virtually significant effect on Pb uptake by the plant and elevated Pb concentration in the soil and plant parts. Optimum phytoextraction was observed when 5mg kg −1 EDTA and DTPA was added alone in single dosage to reduce the Pb-chelates leaching risk.

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EDTA-Enhanced Phytoremediation of Heavy Metals: A Review

Cited by 196 publications

References 181 publications

Ecological changes in historically polluted soils: Metal(loid) bioaccumulation in microarthropods and their impact on community structure

Ecological changes in historically polluted soils: Metal(loid) bioaccumulation in microarthropods and their impact on community structure

A comparison of technologies for remediation of heavy metal contaminated soils

Lead phytoremediation capacity of Puccinellia distans (Jacq.) Parl. using EDTA and DTPA and associated potential leaching risk

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