Chelating agent-assisted electrokinetic removal of cadmium, lead and copper from contaminated soils

Giannis, Apostolos; Nikolaou, Aris; Pentari, Despina; Gidarakos, Evangelos

doi:10.1016/j.envpol.2009.06.030

Cited by 79 publications

(20 citation statements)

References 33 publications

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“…Suitable flushing solutions had to be selected in order to play different roles, in the context where PAHs and metals both existed in our studied aged model sediment: additives allowing to maintain an acidic pH (nitric acid, acetic acid…) or forming soluble complexes with metals (citric acid, EDTA…) proved to be effective for metal removal (Wang et al 2007;Giannis et al 2009;Alcantara et al 2010;Kim et al 2011). Furthermore, maintaining a basic pH (NaOH, n-butylamine…) or using solubilizing compounds such as surfactants (Tween 80, Igepal CA-720, sodium dodecyl sulfate, alkylpolyglucosides…) or cyclodextrins proved to be effective for PAH removal (Reddy et al 2006;Giannis et al 2007;Pazos et al 2010).…”

Section: Resultsmentioning

confidence: 99%

“…EDTA is the most often used complexing agent, but it is toxic and poorly biodegradable compared to CA (Lestan et al 2008). Other chelatants were tested for EK remediation, such as diethylenetriaminepentaacetic acid, nitrilotriacetic acid, diaminocyclohexanetetraacetic acid or ethylene glycol tetraacetic acid, whose removal efficiencies were not the same according to the metals considered (Giannis et al 2009(Giannis et al , 2010. The combined effect of solubilization of metals and metal-complexes at acidic pH are responsible for the removal capacities of chelatants.…”

Section: Removal Of Metalsmentioning

confidence: 99%

“…However, attention has also focused on removing neutral contaminants by the electroosmotic flow driving force. Although EK process does not seem to be the most adapted technology to remove insoluble hydrophobic pollutants such as PAHs, recent studies demonstrated the treatment's effectiveness (Giannis et al 2009;Pazos et al 2010). …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous electrokinetic removal of polycyclic aromatic hydrocarbons and metals from a sediment using mixed enhancing agents

Ammami

Benamar

Wang

et al. 2013

Int. J. Environ. Sci. Technol.

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The maintenance of harbor waterways generates large amounts of dredged sediments which are often rich in coexisting organic and inorganic contaminants. Electrokinetic remediation treatments have recently been developed for the simultaneous removal of heavy metals and polycyclic aromatic hydrocarbons (PAHs), using various enhancing agents generally tested sequentially. In this study, different processing fluids were tested, alone or mixed, to improve the decontamination of aged model sediment contaminated with cadmium, lead, chromium, copper, zinc, and five PAHs. Nitric acid (NA) and citric acid (CA) were tested to avoid the formation of an alkaline front into the sediment and favor the metals removal, while an anionic surfactant [sodium dodecyl sulfate (SDS)] and a nonionic surfactant (Tween 20) were tested to solubilize and mobilize PAHs. Processing fluids were circulated under a constant voltage gradient of 1 V cm -1 for 10-14 days. NA showed an excellent potential to remove metals (76.8-99.9 % removal) and PAHs (70.3-89.7 % removal) in a single run. Besides, the mixture of Tween 20 and CA, more environmental friendly, could be considered as a relatively good processing fluid for the simultaneous removal of metals (10.3-90.8 % removal) and PAHs (53.6-61.6 % removal) from the fine-grained sediment, while SDS mixed to CA was not a good candidate for this purpose (0.1-65 % removal for metals and 34.1-41.0 % removal for PAHs).

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Section: Resultsmentioning

confidence: 99%

Section: Removal Of Metalsmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous electrokinetic removal of polycyclic aromatic hydrocarbons and metals from a sediment using mixed enhancing agents

Ammami

Benamar

Wang

et al. 2013

Int. J. Environ. Sci. Technol.

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“…Humic acid and fulvic acid have the ability to form complex with metal ions (Fu et al, 2011). Exchange capacity of fulvic acid which is more than twice higher than that of humic acid causes fulvic acid to be easier to penetrate cells and spread throughout the living organisms (Giannis et al, 2009). Due to the different nature of the two types of organic active matter, fulvic acid plays a greater role in the mechanism of depuration in organ cells through immersion method in the media, yet the role of humic acid outside the cell organ of experimental fish is also important.…”

Section: Discussionmentioning

confidence: 99%

Application of gamal Gliricidia sepium leaves compost as depuration agent of leads (Pb) in the body organ of red tilapia Oreochromis sp.

Robin¹,

Nirmala²,

Harris³

et al. 2017

Jurnal Akuakultur Indonesia

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Application of Gliricidia sepium leaves compost as depuration agent of leads (Pb) in the body organ of red tilapia Oreochromis sp.Penggunaan kompos daun gamal Gliricidia sepium sebagai pendepurasi timbal (Pb) pada organ nila merah Oreochromis sp. ABSTRACTThis study was aimed to perform depuration of Pb contained in tilapia body. The experiments were conducted in aquarium using compost of Gliricidia sepium leaves at different concentrations i.e. 10g/L, 20 g/L, 30 g/L, 40 g/L, and 0 g/L (control). The result showed that Pb level in fish muscle immersed with compost of Gliricidia leaves at a dose of 30 g/L for five days successfully decreased to a safe limit for human consumption (<0.3 mg/kg). However, decrease of Pb level in fish liver and kidney to finally reach the safe limit required seven days. Decreasing level of lead in the organs of experimental fish along with the increasing level of Pb in compost and culture media indicated that Pb accumulated in fish were released into the culture media by compost through chelation process.To conclude, compost of G. sepium leaves can be used as the material for depuration of Pb in the body of tilapia Keywords: humic acid, fulvic acid, depuration, Gliricidia leaves, lead, red tilapia ABSTRAKPenelitian ini bertujuan untuk mendepurasi Pb yang terkandung di tubuh ikan nila. Percobaan dilakukan di dalam akuarium menggunakan kompos daun gamal pada konsentrasi 10 g/L, 20 g/L, 30 g/L, 40 g/L, dan 0 g/L (kontrol). Hasil penelitian menunjukkan bahwa, Pb di daging ikan yang direndam dengan kompos daun gamal pada konsentrasi 30 g/L selama lima hari, kadarnya menurun hingga batas aman untuk dikonsumsi manusia (<0,3 mg/ kg). Penurunan Pb di hati dan ginjal untuk mencapai kadar aman membutuhkan waktu yang lebih lama, yakni tujuh hari. Seiring dengan menurunnya kadar Pb dalam organ ikan uji, kisaran Pb dalam kompos dan media budidaya meningkat, menunjukkan bahwa Pb dari tubuh ikan dilepaskan ke media budidaya dan terjadi proses khelat oleh kompos. Dengan demikian, kompos daun gamal bisa digunakan sebagai bahan pendepurasi Pb dari tubuh ikan nila.

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“…The effect of enhancement agents on heavy metal removal efficiency of EK remediation was extensively studied [8,10,12,13]. However, most studies were lab-scale, the larger scale ex suit EK remediation with enhancement agents has been rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Medium-scale ex suit electrokinetic remediation of Cd and Zn polluted soil enhanced by EDTA, tartaric acid, citric acid and acetic acid

Liu¹,

Li²,

Wang³

et al. 2017

Proceedings of the 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017)

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Abstract:The effect of enhancement agents on the efficiency of electrokinetic (EK) remediation of contaminated soils has been extensively studied in the past few years. However, the larger scale ex suit EK remediation with enhancement agents has been rarely reported. In this study, medium-scale EK remediation tests (20 kg dry soil at a single test) enhanced by EDTA, tartaric acid, citric acid and acetic acid were carried out to remove Cd and Zn from the contaminated soil. The removal efficiencies of Cd and Zn were enhanced by EDTA, tartaric acid and citric acid, and the enhanced effect of acetic acid on removal efficiencies of Cd and Zn was less. The highest removal efficiencies of Cd and Zn were 22.2% (citric acid) and 23.3% (tartaric acid), respectively. Low removal efficiencies were ascribed to the accumulations of Cd and Zn in F1 (exchangeable) and F2 (carbonate-associated) fractions in the middle section soils after EK remediation for all tests. After EK remediation, the F3 (reducible) concentrations of Cd and Zn, lower than initial concentrations, increased with the distance from the anode for all tests. The results suggested that F3 fraction can be transformed into F1 and F2 fractions, and F1, F2 and F3 fractions were removable during the EK remediation. Comparing with the control test (CT), more variations of total concentration and speciation of Cd and Zn were found, indicating apparent effects of enhancement agents on heavy metal removal during EK remediation. The results are significant for the enlargement of ex suit EK remediation.

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Chelating agent-assisted electrokinetic removal of cadmium, lead and copper from contaminated soils

Cited by 79 publications

References 33 publications

Simultaneous electrokinetic removal of polycyclic aromatic hydrocarbons and metals from a sediment using mixed enhancing agents

Simultaneous electrokinetic removal of polycyclic aromatic hydrocarbons and metals from a sediment using mixed enhancing agents

Application of gamal Gliricidia sepium leaves compost as depuration agent of leads (Pb) in the body organ of red tilapia Oreochromis sp.

Medium-scale ex suit electrokinetic remediation of Cd and Zn polluted soil enhanced by EDTA, tartaric acid, citric acid and acetic acid

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