Effect of dissolved organic matter composition on metal speciation in soil solutions

Ren, Zongling; Tella, Marie; Bravin, Matthieu; Comans, R.N.J.; Dai, Jun; Garnier, Jean‐Marie; Sivry, Yann; Dœlsch, Emmanuel; Straathof, Angela L.; Benedetti, Marc F.

doi:10.1016/j.chemgeo.2015.01.020

Cited by 108 publications

(59 citation statements)

References 56 publications

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“…These reactions and changes may enhance metal solubility and mobility (Rashid, 1985). The enhanced solubility of metals as a consequence of chelation reactions by organic compounds is widely accepted and frequently reported (Güngör and Bekbölet, 2010;Borggaard et al, 2011;Ren et al, 2015;An et al, 2015). However, the same behavior was not observed in FA doses.…”

Section: Soluble-exchangeable Heavy Metals/metalloidmentioning

confidence: 76%

“…The amounts of soluble Cu in the treatments H1, H2, F1 and F2 in soil samples S3 and S4, showed no significant differences (Table 4). Fulvic acid is the dominant fraction in humic substances for links with ions and metals in the soil solution, which explains the reduction of soluble Cu concentration compared to control (Ren et al, 2015).…”

Section: Soluble-exchangeable Heavy Metals/metalloidmentioning

confidence: 99%

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Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances

Boechat

Pistóia

Lüdtke

et al. 2016

Rev. Bras. Ciênc. Solo

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Bioavailability of heavy metals at contaminated sites is largely controlled by the physicochemical properties of the environmental media such as dissolved organic matter, hydroxides and clay colloids, pH, soil cation exchange capacity and oxidation-reduction potential. The aim of this study was to investigate soil pH and heavy metal solubility effect by levels of humic and fulvic acids applied in soil samples with different levels of contamination by heavy metals. The soil samples used in this study were collected in a known metal-contaminated site. Humic acid (HA) and fulvic acid (FA) were purchased as a commercially available liquid material extracted from Leonardite. The experiment was carried out in a factorial scheme of 4 × (4 + 1), with four contaminated soil samples and four treatments, comprised of two levels of HA, two levels of FA and a control. The HA treatments increased the solubility of Cu, Zn, Ni, Cr, Cd, Pb, As and Ba from soils, while FA treatments decreased, thus raising or not their availability and mobility in soil. Humic acid concentration did not influence soil pH and FA decreased soil pH until 0.7 units. The initial heavy metal concentration in soil affects the magnitude of the processes involving humic substances. The lower releases of heavy metals by FA verified the importance of the complexation properties of organic compounds. These results appear to encourage the use of HA for increased plant-availability of heavy metals in remediation projects and the use of FA for decreased plant-availability of heavy metals at contaminated sites with a risk of introducing metals into the food chain.

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Section: Soluble-exchangeable Heavy Metals/metalloidmentioning

confidence: 76%

Section: Soluble-exchangeable Heavy Metals/metalloidmentioning

confidence: 99%

Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances

Boechat

Pistóia

Lüdtke

et al. 2016

Rev. Bras. Ciênc. Solo

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show abstract

“…1706 and 1540 cm −1 [23,[27][28]. The absorption band at 1706 cm −1 corresponds to stretching vibrations of C=O in -COOH functional groups, while absorption band at ca.…”

Section: Characteristics Of Humic Acid Adsorbentmentioning

confidence: 99%

“…Previous studies clearly indicated that the binding of metal ions onto the -COOH group of HAs led to the appearance of a new absorption band at ca. 1380 cm −1 [27][28]. Hence, the appearance of a new absorption band at 1380 cm −1 should be interpreted as being due to the presence of that binding.…”

Section: Effect Of Medium Phmentioning

confidence: 99%

The Role of Carboxyl and Hydroxyl Groups of Humic Acid in Removing AuCl<sub>4</sub><sup>-</sup> from Aqueous Solution

et al. 2017

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“…Also, it is one of the most affinity metals to humic substances compared with others [8][9][10]. It was reported that humic complexed form accounted for up to 99.9% of total Cu in solution [3,8,11] indicating that Cu speciation is extremely sensitive to humic substances heterogeneity in quantity and quality [12,13]. The dissolved organic matter (DOM) is a complex mixture of reactive molecules and its reactive part is dominated by humic substances, comprising humic acids (HA), fulvic acids (FA) and hydrophilic acid [8], and its effect on Cu speciation in soil systems are still unclear.…”

Section: Introductionmentioning

confidence: 99%

Is the computed speciation of copper in a wide range of Chinese soils reliable?

Yang

2017

Chemical Speciation & Bioavailability

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Effect of dissolved organic matter composition on metal speciation in soil solutions

Cited by 108 publications

References 56 publications

Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances

Solubility of Heavy Metals/Metalloid on Multi-Metal Contaminated Soil Samples from a Gold Ore Processing Area: Effects of Humic Substances

The Role of Carboxyl and Hydroxyl Groups of Humic Acid in Removing AuCl<sub>4</sub><sup>-</sup> from Aqueous Solution

Is the computed speciation of copper in a wide range of Chinese soils reliable?

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