Findings on the Phytoextraction and Phytostabilization of Soils Contaminated with Heavy Metals

Cheraghi, Mehrdad; Lorestani, Bahareh; Khorasani, Nematollah; Yousefi, N.; Karami, Mahmoud

doi:10.1007/s12011-009-8359-0

Cited by 73 publications

(32 citation statements)

References 12 publications

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“…A comparison of cadmium accumulation in roots and shoots of other grasses, such as Lolium perenne (Lou et al, 2013), Elymus elongatus (Sipos et al, 2013) and Secale cereale , also shows that roots tend to contain more of this metal than shoots. Mendez and Maier (2008), Cheraghi et al (2011) and Zhang et al (2012) have recommended plants (monocotyledons and dicotyledons) with a high BAF (> 1) and a low translocation index (TRL < 1) as the best candidates for phytostabilization. The values of TRL for F. ovina growing at 1 μg ml -1 as well as at 10 μg ml -1 were much lower than 1 (0.04 and 0.14, respectively).…”

Section: Discussionmentioning

confidence: 99%

Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina Hydroponic Culture

Majewska

Słomka

2016

Polish Journal of Microbiology

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.lublin.pl IntroductionCadmium is not essential for plant, animal and human metabolism ( Van der Perk, 2006). The only known biological function of Cd has been described in marine diatoms under zinc limitation. In those conditions, a low concentration of Cd acted as a cofactor in Cd-carbonic anhydrase (Xu and Morel, 2013). Cadmium tends to be less strongly adsorbed than other divalent metals and, therefore, it is more labile in soil and more available to plants Kacál-ková et al., 2014 . In such cases, it is very important to prevent the migration of these metals to surrounding uncontaminated soils. Apart from physico-chemical stabilization (compost application, liming etc.), phytostabilization can be taken into account as a method of remediation of HM-contaminated soils (Alvarenga et al., 2008). This method is an aesthetically pleasing strategy that uses the ability of metal-tolerant plants to grow in and cover contaminated ground. Phyto stabilization consists in sequestration of metals within roots and the rhizosphere without translocating them into the above-ground plant tissues (Mendez and Maier, 2008;Ganesan, 2012;Zhang et al., 2012). Plants are colonized by endophytic and rhizospheric micro organisms which increase the resistance of their hosts to environmental stresses (Jha et al., 2013). These microorganisms can play an important role in phyto remediation of soils polluted with heavy metals (Soleimani et al., 2010) and many other, especially organic, contaminants (Gerhardt et al., 2009).Organic components of root exudates are a good source of nutrients and energy for microorganisms, hence, a microbial community living in the rhizo sphere can be 10-100 times larger than the same type of community found in bulk soil (Huang and Germina, 2002). Understanding the microbiological, biochemical and physiological aspects of phytoremediation of soil and water environments polluted to different degrees with heavy metals has very important theoretical and practical implications. In this study, a comparison was made between total cadmium concentration in root and shoot tissues as well as concentrations of particular fractions of Cd immobilized by roots of Festuca ovina (Sheep's fescue) hydroponically cultivated in nutrient solutions supplemented with 1 μg Cd ml -1 and those cultivated at 10 μg Cd ml -1 Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina. After three weeks of F. ovina cultivation, the number of bacterial CFU and the amounts of organic chelators, siderophores, proteins and reducing sugars in the growth medium and on the root surface were higher at 10 than at 1 μg Cd ml -1 . The grass also reacted to the high Cd concentration by a decrease in plant growth and dehydrogenase activity in root tissues. The concentration of Cd determined in fractions bound with different strength in roots was significantly dependent on Cd concentration in the growth medium. When the plants were grown at 1 μg Cd ml -1 , 9% of the immobilized cadmium was loosely bound to the root su...

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Section: Discussionmentioning

confidence: 99%

Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina Hydroponic Culture

Majewska

Słomka

2016

Polish Journal of Microbiology

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“…Different letters represent significant difference (P < 0.05) among treatment of the humic substances. *Significant difference (P < 0.05) between ecotypes stable and efficient way than precipitation within the rhizosphere, which could result in a release of heavy metals to soils with a change of environmental conditions (Meeinkuirt et al 2013;Cheraghi et al 2011). Thus, looking for much more effective measures to enhance phytoremediation potential of plant is a key point in phytostabilization technology.…”

Section: Discussionmentioning

confidence: 99%

“…This strategy involves the use of Communicated by Zhihong Xu metal-tolerant plant species to immobilize metals through absorption and accumulation by roots, or precipitation within the rhizosphere, thus reducing metal mobility and bioavailability in the environment (Conesa et al 2006;Cheraghi et al 2011). However, the bioavailability of heavy metals in soils is a limiting factor to the phytostabilization capacity of plants (Lambrechts et al 2011).…”

Section: Introductionmentioning

confidence: 99%

The influence of humic substance on Cd accumulation of phytostabilizer Athyrium wardii (Hook.) grown in Cd-contaminated soils

Zhan

et al. 2016

Environ Sci Pollut Res

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The application of organic amendments into heavy metal contaminated soil is considered as an environmentally friendly technique to promote the potential of phytoremediation. A pot experiment was carried out to evaluate the effect of humic substances on growth, cadmium (Cd) accumulation and phytostabilization potential of the mining ecotype (ME) and the corresponding non-mining ecotype (NME) of Athyrium wardii (Hook.) grown in Cd-contaminated soils. The addition of the humic substances demonstrated great promotion for the growth and Cd uptake of ME. Both plant biomass and Cd concentration significantly increased with the increasing application of the humic substances up to 100 g kg(-1), beyond which no significant change of underground part biomass and Cd concentrations in underground part of A. wardii was observed. The maximum Cd concentration in underground part of ME was 180 mg kg(-1) when 150 g kg(-1) humic substances were applied. The ME showed greater Cd accumulation capability in underground part (0.47-0.68 mg plant(-1)) than that of NME (0.27-0.45 mg plant(-1)). Increasing bioaccumulation coefficient (BCF) values of A. wardii was observed with increasing application of the humic substances. The BCF values of ME were higher than those of NME. However, the use of the humic substances exhibited little impact on translocation factors (TFs) of ME, and the TF values of ME were less than NME. Furthermore, the application of the humic substances improved the remediation factors (RFs) of A. wardii. The RF values in underground part of ME ranging from 0.73 to 0.91 % were apparently higher than those of NME. These results indicated that the humic substances can be a potential candidate for enhancing the phytostabilization of A. wardii grown in Cd-contaminated soils.

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“…At the same time, all BF aboveground parts were much lower than 1.0, indicating a total lack of usefulness of the tested plants for phytoextraction (McGrath and Zhao 2003). At the same time, the value of BF roots close to 1.0 for Z. mays suggests its suitability for phytostabilization (Cheraghi et al 2011).…”

Section: Ni Accumulation and Translocationmentioning

confidence: 93%

“…Plants with a high biomass and high bioaccumulation factor for aboveground parts (BF aboveground parts > 1) are appropriate for phytoextraction (Cheraghi et al 2011;McGrath and Zhao 2003), while plants with a high bioaccumulation factor for roots (BF roots > 1) and, simultaneously, with a low translocation factor (TF < 1) are appropriate for phytostabilization (Cheraghi et al 2011;Roccotiello et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Phytoremediation potential of Phalaris arundinacea, Salix viminalis and Zea mays for nickel-contaminated soils

Korzeniowska

Stanislawska-Glubiak

2018

Int. J. Environ. Sci. Technol.

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The aim of this study was to evaluate the usefulness of Phalaris arundinacea, Salix viminalis and Zea mays to the phytoremediation of the soil contaminated with nickel. A 2-year microplot experiment was carried out with plants growing on Ni-contaminated soil. Microplots (1 m 2 × 1 m deep) were filled with Haplic Luvisols soil. Simulated soil contamination with Ni was introduced in the following doses: 0-no metals, Ni 1 -60, Ni 2 -100 and Ni 3 -240 mg kg −1 . The phytoremediation potential of plants was evaluated using a tolerance index, bioaccumulation factor, and translocation factor. None of the tested plants was a species with high Ni phytoremediation potential. All of them demonstrated a total lack of usefulness for phytoextraction; however, they can be in some way useful for phytostabilization. Z. mays accumulated large amounts of Ni in the roots, which made it useful for phytostabilization, but, at the same time, showed little tolerance to this metal. For this reason, it can be successfully used only on soils medium-contaminated with Ni, where a large yield decrease did not occur. Its biomass may be safely used as cattle feed, as the Ni transfer from roots to shoots was strongly restricted. P. arundinacea and S. viminalis accumulated too little Ni in the roots to be considered as typical phytostabilization plants. However, they may be helpful for phytostabilization due to their high tolerance to Ni. These plants can grow in the soil contaminated with Ni, acting as a protection against soil erosion or the spread of contamination.

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Findings on the Phytoextraction and Phytostabilization of Soils Contaminated with Heavy Metals

Cited by 73 publications

References 12 publications

Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina Hydroponic Culture

Levels of Organic Compounds, Number of Microorganisms and Cadmium Accumulation in Festuca ovina Hydroponic Culture

The influence of humic substance on Cd accumulation of phytostabilizer Athyrium wardii (Hook.) grown in Cd-contaminated soils

Phytoremediation potential of Phalaris arundinacea, Salix viminalis and Zea mays for nickel-contaminated soils

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