Extraction of heavy metals from a contaminated soil by reusing chelating agent solutions

Mohamed, Mahmoud Ahmed; Efligenir, Anthony; Husson, Jérôme; Persello, Jacques; Fiévet, P.; Fatin‐Rouge, Nicolas

doi:10.1016/j.jece.2013.05.015

Cited by 17 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soil washing is an ex (or in) situ technology using a water-based process and relies on traditional chemical and physical extraction and separation processes for removing a broad range of organic and inorganic contaminants from soils [ 6 ]. A range of washing agents, including inorganic acids, organic acids, chelating agents such as ethylene diamine tetraacetic acid (EDTA), synthetic surfactants, and biosurfactants, are used for recovering heavy metals from soils [ 7 , 8 ]. In these washing agents, synthetic surfactants are effective chemical agents in the removal of heavy metals from contaminated soil [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Removal of Cadmium and Lead from Contaminated Soils Using Sophorolipids from Fermentation Culture of Starmerella bombicola CGMCC 1576 Fermentation

Zhong

et al. 2018

IJERPH

View full text Add to dashboard Cite

Soil contaminated with Cd and Pb has caused sharp decrease of cultivatable soil and has been attracting increasing attention. Biosurfactants are efficient in solving the problem. However, little information is available about the influence of sophorolipids (SLs) on the remediation of Cd- or Pb-contaminated soil. The sophorolipids produced by Starmerella bombicola CGMCC 1576 were used to study the effects of Cd and Pb removal in batch soil washing from artificially contaminated soil. The removal efficiency of crude total SLs was better than both distilled water and synthetic surfactants. Furthermore, 83.6% of Cd and 44.8% of Pb were removed by 8% crude acidic SLs. Acidic SLs with high water solubility were more effective than lactonic SLs in enhancing remediation of heavy metal-contaminated soils. The complexation of Cd with the free carboxyl group of the acidic SLs was observed by Fourier-transform infrared spectroscopy study, and this complexation was effective in heavy metal removal from the soil. The fermentation broth of S. bombicola, without further preparation, removed 95% of Cd and 52% of Pb. These results suggested that SLs produced by S. bombicola could function as potential bioremediation agents for heavy metal-contaminated soil.

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of Cadmium and Lead from Contaminated Soils Using Sophorolipids from Fermentation Culture of Starmerella bombicola CGMCC 1576 Fermentation

Zhong

et al. 2018

IJERPH

View full text Add to dashboard Cite

show abstract

“…Literature has also shown that a higher amount of metals can be extracted by consecutive washes of the soil with the chelating solution. A total of 4 washes yielded the optimum amount of extracted metals from the soil [10], [19]. Mohamed et al [10] found that after these washes up to 40 % of the chelating solution was lost.…”

Section: Economic Evaluation Of Extracting Metals From Contaminated Soilsmentioning

confidence: 99%

“…A total of 4 washes yielded the optimum amount of extracted metals from the soil [10], [19]. Mohamed et al [10] found that after these washes up to 40 % of the chelating solution was lost. Zeng et al [21] found that only 20-24% of the chelating solution was lost after seven washes.…”

Section: Economic Evaluation Of Extracting Metals From Contaminated Soilsmentioning

confidence: 99%

“…The use of chelants often offer a more environmentally friendly option as acids can easily cause damage to the soil integrity [4]. Common chelants that are used include ethylenediaminetetraacetic acid (EDTA) [8], ethylenediamine-N, N'-disuccinic acid (EDDS) [9], and iminodisuccinic acid (IDSA) [10]. Chelate remediation need to be considered with care as not all of them are environmentally sound and therefore, recycling of any chelant is necessary.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Washing and Extraction of Metals from Two Industrially Contaminated Soils: A Prognostication for Techno-economic Clean up

Uyo

Mgbeahuruike

Potgieter‐Vermaak

et al. 2021

EJCHEM

View full text Add to dashboard Cite

The extraction and recovery of metals from contaminated soil has become inevitable considering the increasing premium placed on environmental and human health protection as well as predicted shortfalls in primary metal production. In this study, metal extraction from two industrially contaminated soils (Copsa-mica [Rb-So] and Campina [Ro-PH]) were considered for process (column and heap) leaching configuration using different selected chelating substances; ethylene diamine tetraacetic acid [EDTA], ethylene diamine disuccinic acid [EDDS], acetylacetone [Hacac] and citric acid [CA]. The result confirms optimal recovery of EDTA column-induced-Rb-So over chelant-heap induced configuration and was adopted for economic prediction using two possible (60% and 100%) recycled scenarios. The 100% recycled scenario resulted in a viable economic process sufficient enough to offset clean-up cost. Metal separation and recovery from M-EDTA complex could be facilitated with the use of H2S gas precipitated in hydrogen flame combustion. The process economics predicted offered a probable prospect for metal separation from washing liquor.

show abstract

“…We aimed also to study the interactions between these factors (synergistic or inhibitory) and finally to propose a modeling of this extraction according to factors. ey are nature of the chelating agent [19], pH of the medium, the ratio mass of the soil to volume of the extractant solution [20], soil's particle size [21], and the contact time between the soil and the extracting's solution [18]. e experimental methodology was adopted to achieve these objectives: a fractional factorial design 2 (5−1) was used to determine the effects of the five factors studied on the extraction and the intensity and the type of interactions between them [22].…”

Section: Introductionmentioning

confidence: 99%

Hierarchization of Physicochemical Factors during Simultaneous Removal of Lead and Copper from the Marrakech Municipal Discharge Soils

Aityoub

Abouelfida

Benyaich

et al. 2020

Journal of Chemistry

View full text Add to dashboard Cite

Heavy metals became a great concern for scientists due to their harmful action on the environment and human life. EDTA and NTA chelation capacity were used to assess soil decontamination. The effect of pH, ligand, soil solution contact time with agitation, soil solution ratio, and particle size were investigated, in order to prioritize them, using the design of experiment methodology (Doe): pH was the most influential factor while the ratio mass of the soil by the volume of the solution and particle size were of equal importance. EDTA was more effective as a chelator than NTA in removing metals from the soil. The contact time was not a significant factor; a contact time of 10 minutes was sufficient to extract the two metals studied. An extraction efficiency of 45% was achieved for Pb and 85% for Cu without optimization process.

show abstract

Extraction of heavy metals from a contaminated soil by reusing chelating agent solutions

Cited by 17 publications

References 30 publications

Removal of Cadmium and Lead from Contaminated Soils Using Sophorolipids from Fermentation Culture of Starmerella bombicola CGMCC 1576 Fermentation

Removal of Cadmium and Lead from Contaminated Soils Using Sophorolipids from Fermentation Culture of Starmerella bombicola CGMCC 1576 Fermentation

Washing and Extraction of Metals from Two Industrially Contaminated Soils: A Prognostication for Techno-economic Clean up

Hierarchization of Physicochemical Factors during Simultaneous Removal of Lead and Copper from the Marrakech Municipal Discharge Soils

Contact Info

Product

Resources

About