Novel EDTA and process water recycling method after soil washing of multi-metal contaminated soil

Pociecha, Maja; Leštan, Domen

doi:10.1016/j.jhazmat.2011.11.092

Cited by 31 publications

(22 citation statements)

References 27 publications

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“…The EDTA is the most commonly used chelant because it has a strong chelating ability for cationic heavy metals, EDTA leaching can be used to treat a broad range of soil types, and the EDTA is recoverable (Dermont et al, 2008). A number of previous studies have investigated the optimum operational parameters of soil washing with EDTA, including dosage, washing cycle, post-wash rinses (Andrade et al, 2007), regeneration of EDTA leachate (Di Palma et al, 2005;Lo and Zhang, 2005;Finzgar and Lestan, 2008;Cesaro and Esposito, 2009), and EDTA degradation (Finzgar and Lestan, 2008;Pociecha and Lestan, 2012;Voglar and Lestan, 2012a).…”

Section: Introductionmentioning

confidence: 99%

Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals

Hu¹,

Bingfan²,

Dong³

et al. 2014

Chemosphere

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Section: Introductionmentioning

confidence: 99%

Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals

Hu¹,

Bingfan²,

Dong³

et al. 2014

Chemosphere

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“…다 (Dermont et al, 2008;Zeng et al, 2005 (Gyliene et al, 2004;Lim et al, 2005;Lim and Kim, 2013;Lo and Zhang, 2005;Di Palma et al, 2005;Pociecha and Lestan, 2010, 2012a, 2012bPociecha et al, 2011, Voglar andZeng et al, 2005 (Fig. 1a), Ni (Fig.…”

Section: 서 론mentioning

confidence: 97%

Separation of Heavy Metals from Metal-EDTA in Spent Soil Washing Solution by using Na<sub>2</sub>S

Oh¹,

Shin

2015

Journal of Soil and Groundwater Environment

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Soil washing with ethylenediaminetetraacetic acid (EDTA) is highly effective in the remediation of soils contaminated with heavy metals. The EDTA recycling process is a requisite for reducing the operating cost. The applicability of Na 2 S addition on the precipitation of heavy metals from the spent soil washing solution and thereby recycling of EDTA was investigated. Addition of Na 2 S into the single metal-EDTA and the mixed metal-EDTA solutions ([Na 2 S]/[metal-EDTA] ratio = 30, reaction time = 30 min and pH = 7~9) was highly effective in the separation of Cu and Pb from metal-EDTA complexes, but not for Ni. The Zn removal efficiency varied with pH and slightly increased upto 40% as the reaction time increased from 0 to 240 min which was longer than those for Cu and Pb. Ca(OH) 2 was subsequently added to induce further precipitation of Zn and Ni and to reduce the Na 2 S dose. At the [Na 2 S]/[metal-EDTA] ratio of 10, the removal efficiencies of all heavy metals excluding Ni were above 98% with the dose of Ca(OH) 2 at 0.002, 0.006 and 0.008 g into 100 mL of Cu-, Pb-and Zn-EDTA solutions, respectively. However, Ca(OH) 2 addition was not effective for Ni-EDTA solution. A further research is needed to improve metal removal efficiency and subsequent EDTA recycling for the real application in field-contaminated soils.

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“…Currently the EAOP is employed as the last stage of remediation to break down persistent contaminants [30,73,77]. The possible reasons for this include: (i) its powerful degradation capacity for POPs; (ii) its high cost; and (iii) electrode shelf life through fouling of the surface by heavily polluted samples.…”

Section: Combination With Other Approachesmentioning

confidence: 99%

Electrochemical Advanced Oxidation Processes (EAOP) to degrade per- and polyfluoroalkyl substances (PFASs)

Fang

Megharaj

Naidu

2017

Journal of Advanced Oxidation Technologies

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Abstract:Per-and polyfluoroalkyl substances (PFASs) have been recently listed as emerging contaminants (ECs) and persistent organic pollutants (POPs) due to their human and environmental health concerns. In the last 10 years, their detection and remediation have progressed significantly. Herein, we critically review recent developments in electrochemical advanced oxidation process (EAOP) towards their remediation. Particular attentions are paid to perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), which present the main concerns of PFASs at this time. Due to the persistence of those PFASs, other remediation approaches may experience difficulty in degrading them, whilst EAOP has demonstrated success. The fundamentals of EAOP are highlighted and the scale-up application is discussed regarding the future research directions.

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Novel EDTA and process water recycling method after soil washing of multi-metal contaminated soil

Cited by 31 publications

References 27 publications

Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals

Assessment of EDTA heap leaching of an agricultural soil highly contaminated with heavy metals

Separation of Heavy Metals from Metal-EDTA in Spent Soil Washing Solution by using Na<sub>2</sub>S

Electrochemical Advanced Oxidation Processes (EAOP) to degrade per- and polyfluoroalkyl substances (PFASs)

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