Effects of dissolved organic matter from the rhizosphere of the hyperaccumulator Sedum alfredii on sorption of zinc and cadmium by different soils

Li, Tingqiang; Di, Zhenzhen; Yang, Xiaoe; Sparks, Donald L.

doi:10.1016/j.jhazmat.2011.06.086

Cited by 107 publications

(30 citation statements)

References 43 publications

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“…The influence of soil pH on heavy metal bioavailability appears variable. Heavy metal availability may be affected by several factors such as soil pH, chelates, and microbial activity (Li et al, 2011b).…”

Section: Discussionmentioning

confidence: 99%

Comparison of chelates for enhancing Ricinus communis L. phytoremediation of Cd and Pb contaminated soil

Zhang

Guo

Yang

et al. 2016

Ecotoxicology and Environmental Safety

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a b s t r a c tWe studied chelate effects on castor bean (Ricinus communis L.) growth. These effects included Cd and Pb accumulation in plant tissues and the chemical behavior of Cd and Pb in the plant rhizosphere and nonrhizosphere. Tests were conducted in a glasshouse using the rhizobag method. Two castor bean cultivars (Zibo-3 and Zibo-9) were grown in soil contaminated with 3.53 mg/kg Cd and 274 mg/kg Pb. The soil was treated with citric acid (CA), ethylenediamine disuccinic acid (EDDS) or ethylenediamine tetraacetic acid (EDTA) (5 mmol/kg). EDDS-treated soil produced 28.8% and 59.4% greater biomass for Zibo-3 and Zibo-9 respectively. In contrast, CA and EDTA inhibited the growth of the two cultivars. Zibo-9 had greater tolerance than Zibo-3 to chelate toxicity. Based on Cd and Pb plant uptake, EDDS could substitute for EDTA for phytoremediation of Cd in soil. EDTA was the most effective of the three chelates for Pb phytoremediation but it is less suitable for field use due to toxicology environmental persistence. Acid extractable Cd and Pb in the rhizosphere or reducible Cd and Pb in the non-rhizosphere of soil were the main influences on Cd and Pb accumulation in castor bean.

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Section: Discussionmentioning

confidence: 99%

Comparison of chelates for enhancing Ricinus communis L. phytoremediation of Cd and Pb contaminated soil

Zhang

Guo

Yang

et al. 2016

Ecotoxicology and Environmental Safety

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“…Hundreds of hyperaccumulators have been identified and described in the past three decades (Li et al 2011). Most hyperaccumulators, such as Thlaspi or Alyssum, are characterized by a generally slow growth rate and low biomass production, which make these plants impractical for use in phytoextraction in the field (Evangelou et al 2004;Peer et al 2005;Puschenreiter et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…To date, studies on the mechanism of metal tolerance and accumulation of Salix have been mainly focused on the uptake (Lu et al 2008;Mleczek et al 2011;Yang et al 2006) and subcellular distribution characteristics Tian et al 2009), with no information on many basic processes in the rhizosphere of the plant (Li et al 2011;Pilon-Smits 2005). The processes of metal accumulation by the rhizosphere have not been elucidated; nor have the mechanisms of trace element solubilization and absorption by plants from contaminated soils (Gonzaga et al 2009;Li et al 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The processes of metal accumulation by the rhizosphere have not been elucidated; nor have the mechanisms of trace element solubilization and absorption by plants from contaminated soils (Gonzaga et al 2009;Li et al 2011). Several studies have tried to assess changes in rhizosphere chemistry of hyperaccumulator and nonhyperaccumulator plants with high capacity for metal accumulation for solubilisation of non-labile forms of metals.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Ca/Mg ratio and Cd2+ and Pb2+ elements on low molecular weight organic acid secretion by Salix viminalis L. roots into the rhizosphere

Magdziak

Mleczek

Kaczmarek

et al. 2012

Trees

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A modified hydroponic experiment was focused on the influence of mutual changes in the Ca/Mg ratio and trace elements (Cd and Pb) concentration in solution on the efficiency of low molecular weight organic acid (LMWOA) formation in the Salix viminalis rhizosphere. The study showed that changes in the LMWOA contents were caused by the Ca/Mg ratio as well as the kind and concentration of trace element (Cd or Pb) in hydroponic solution. Under 0.5 mM solution of Cd, the total concentration of LMWOAs-depending on the Ca/Mg ratio-decreased according to the formula: 20:1 [ 4:1 [

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“…For Pb-contaminated soils, phytoextraction and phytostabilization are the main remediation technologies used. Accumulator plant, species which have the ability to take up heavy metals from the soil to a level higher than the substrate soil, is a key factor for the phytoremediation of heavy metals4. Root exudates are important to the mechanisms of how accumulator species absorb, accumulate and tolerate heavy metals.…”

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confidence: 99%

Metabolic profiling of root exudates from two ecotypes of Sedum alfredii treated with Pb based on GC-MS

Luo

Wang

Sun

et al. 2017

Sci Rep

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Phytoremediation is an effective method to remediate Pb-contaminated soils and root exudates play an important role in this process. Based on gas chromatography-mass spectrometry (GC-MS) and metabolomics method, this study focuses on the comparative metabolic profiling analysis of root exudates from the Pb-accumulating and non-accumulating ecotypes of Sedum alfredii treated with 0 and 50 μmol/L Pb. The results obtained show that plant type and Pb stress can significantly change the concentrations and species of root exudates, and fifteen compounds were identified and assumed to be potential biomarkers. Leaching experiments showed that l-alanine, l-proline and oxalic acid have a good effect to activate Pb in soil, glyceric acid and 2-hydroxyacetic acid have a general effect to activate Pb in soil. 4-Methylphenol and 2-methoxyphenol might be able to activate Pb in soil, glycerol and diethyleneglycol might be able to stabilize Pb in soil, but these activation effect and stabilization effect were all not obvious.

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Effects of dissolved organic matter from the rhizosphere of the hyperaccumulator Sedum alfredii on sorption of zinc and cadmium by different soils

Cited by 107 publications

References 43 publications

Comparison of chelates for enhancing Ricinus communis L. phytoremediation of Cd and Pb contaminated soil

Comparison of chelates for enhancing Ricinus communis L. phytoremediation of Cd and Pb contaminated soil

Influence of Ca/Mg ratio and Cd2+ and Pb2+ elements on low molecular weight organic acid secretion by Salix viminalis L. roots into the rhizosphere

Metabolic profiling of root exudates from two ecotypes of Sedum alfredii treated with Pb based on GC-MS

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