Soil washing with biodegradable chelating agents and EDTA: Technological feasibility, remediation efficiency and environmental sustainability

Gluhar, Simon; Kaurin, Anela; Leštan, Domen

doi:10.1016/j.chemosphere.2020.127226

Cited by 93 publications

(32 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the concentration of PTMs in soils contaminated by anthropogenic activities is several times the threshold value for toxicity, soil washing can be an effective alternative to solidification/stabilization and landfilling (Liu et al 2021). Several inorganic acids (e.g., hydrochloric, sulfuric, and nitric acid), organic acids (e.g., oxalic, citric, gluconic, and ascorbic acid), synthetic or biodegradable chelating agents (e.g., EDDS, EDTA, GLDA, NTA), and surfactants (e.g., rhamnolipids and sophorolipids) have been tested to improve the efficiency of soil washing (Gluhar et al 2020;Peng et al 2018). Among them, EDTA has proven to be one of the best, most environmentally friendly, and most economical (Gluhar et al 2020;Jelusic et al 2014;Jez and Lestan 2016;Lestan 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Several inorganic acids (e.g., hydrochloric, sulfuric, and nitric acid), organic acids (e.g., oxalic, citric, gluconic, and ascorbic acid), synthetic or biodegradable chelating agents (e.g., EDDS, EDTA, GLDA, NTA), and surfactants (e.g., rhamnolipids and sophorolipids) have been tested to improve the efficiency of soil washing (Gluhar et al 2020;Peng et al 2018). Among them, EDTA has proven to be one of the best, most environmentally friendly, and most economical (Gluhar et al 2020;Jelusic et al 2014;Jez and Lestan 2016;Lestan 2017). Although EDTA soil washing is an efficient and permanent way of removing PTMs from contaminated soils, it may affect soil properties (Gluhar et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Among them, EDTA has proven to be one of the best, most environmentally friendly, and most economical (Gluhar et al 2020;Jelusic et al 2014;Jez and Lestan 2016;Lestan 2017). Although EDTA soil washing is an efficient and permanent way of removing PTMs from contaminated soils, it may affect soil properties (Gluhar et al 2020). In fact, in addition to targeted PTMs, EDTA forms strong complexes with a variety of cations, including alkaline earth metals (Ca and Mg) and other major soil components such as Al and Fe.…”

Section: Introductionmentioning

confidence: 99%

“…The soil properties after ReSoil® washing technology have been evaluated several times in previous studies (Lestan 2017;Gluhar et al 2020;Kaurin et al 2020) and have shown no significant or lasting effects, apart from a slight increase in the pH value of the soil due to the lime treatment of the process solutions. However, the qualitative effect of the remediation on SOM remains largely unknown.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Changes in organic matter composition caused by EDTA washing of two soils contaminated with toxic metals

Jez

Bravo

Leštan

et al. 2021

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

Two soils contaminated with potentially toxic metals (PTMs) contrasting in pH and mineralogy were remediated with CaEDTA, and changes in soil organic matter (SOM) composition were investigated. Previous studies showed no significant loss of SOM from CaEDTA-treated soils, but the results of our study reflected significant decreases (from 46 to 49%) in the free fraction of humic acids (HAs). Remediation affected the composition of the free HA fraction via disturbance of intermolecular bonds — an increase in phenolic and aromatic groups with a simultaneous decrease in carbohydrates — which was confirmed by FTIR spectroscopy in both soils. Because non-radical molecules such as carbohydrates were selectively removed, the concentration of free radicals in the free HA fraction increased in acidic soil. The bound fraction of HAs and fulvic acids (FAs) in SOM, which are important due to their stability and the permanent effects they have on the soil’s physical properties, remained unchanged in both remediated soils. The effect of soil recultivation was observed only in the excitation emission matrix (EEM) fluorescence spectra of HAs. In terms of SOM, CaEDTA soil washing can be considered moderately conservative; however, the restoration of free humic fractions is likely to be a long-term process.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Changes in organic matter composition caused by EDTA washing of two soils contaminated with toxic metals

Jez

Bravo

Leštan

et al. 2021

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…rhamnolipids and sophorolipids) have been tested to improve the e ciency of soil washing (Gluhar et al 2020;Peng et al 2018). Among them, EDTA has proven to be one of the best, most environmentally friendly and most economical (Gluhar et al 2020;Jelusic et al 2014; Jez and Lestan 2016; Lestan 2017). Although EDTA soil washing is an e cient and permanent way of removing PTMs from contaminated soils, it may affect soil properties (Yi and Sung 2015).…”

Section: Introductionmentioning

confidence: 99%

Changes in Organic Matter Composition Caused by EDTA Washing of two Soils Contaminated with Toxic Metals

Jez

Bravo

Leštan

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Two soils contaminated with potentially toxic metals (PTMs) contrasting in pH and mineralogy were remediated with CaEDTA, and changes in soil organic matter (SOM) composition were investigated. Previous studies showed no significant loss of SOM from CaEDTA-treated soils, but the results of our study reflected significant decreases (from 46 to 49%) in the free fraction of humic acids (HAs). Remediation affected the composition of the free HA fraction via disturbance of intermolecular bonds - an increase in phenolic and aromatic groups with a simultaneous decrease in carbohydrates - which was confirmed by FTIR spectroscopy in both soils. Because non-radical molecules such as carbohydrates were selectively removed, the concentration of free radicals in the free HA fraction increased in acidic soil. The bound fraction of HAs and fulvic acids (FAs) in SOM, which are important due to their stability and the permanent effects they have on the soil’s physical properties, remained unchanged in both remediated soils. The effect of soil recultivation was observed only in the EEM fluorescence spectra of HAs. In terms of SOM, CaEDTA soil washing can be considered moderately conservative, however, the restoration of free humic fractions is likely to be a long-term process.

show abstract

Encapsulation of Disodium‐EDTA in Electrospun Polymeric Fibers for the Detection of Heavy Metals

Fotia,

Frontera,

Bonaccorsi

et al. 2023

Advanced Sustainable Systems

View full text Add to dashboard Cite

The contamination by heavy metals (HMs) is a pressing issue, due to their serious impact on the environment and human health. Therefore, the design and the development of a sensing material for their detection has gained a lot of attention. In this study, active layers are produced by the electrospinning technique, using three different polymers and disodium salt of ethylenediaminetetraacetic acid (Na2‐EDTA), known to be a chelating substance for heavy metals. The optimized active layer, in terms of polymer type, degree of encapsulation of the salt, as well as salt suitable content, is obtained and tested using the electrochemical impedance spectroscopy technique. The results of the sensing tests indicate the suitability of the developed electrospun layer for environmental monitoring. It is shown the detection of lead in the range of 10–100 000 µg L−1, with a detection limit of 0.031 µg L−1. Moreover, the system is proved to be robust against interfering contaminants such as thallium, another relevant heavy metal.

show abstract

Soil washing with biodegradable chelating agents and EDTA: Technological feasibility, remediation efficiency and environmental sustainability

Cited by 93 publications

References 32 publications

Changes in organic matter composition caused by EDTA washing of two soils contaminated with toxic metals

Changes in organic matter composition caused by EDTA washing of two soils contaminated with toxic metals

Changes in Organic Matter Composition Caused by EDTA Washing of two Soils Contaminated with Toxic Metals

Encapsulation of Disodium‐EDTA in Electrospun Polymeric Fibers for the Detection of Heavy Metals

Contact Info

Product

Resources

About