Removal of lead and other toxic metals in heavily contaminated soil using biodegradable chelators: GLDA, citric acid and ascorbic acid

Van, Thinh Nguyen; Osanai, Yasuhito; Adachi, Tatsuro; Vuong, Bui Thi Sinh; Kitano, Ippei; Chung, Nguyen Thuy; Thai, Phong K.

doi:10.1016/j.chemosphere.2020.127912

Cited by 49 publications

(6 citation statements)

References 55 publications

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“…The higher removal e ciencies of Pb and Cu from the alkaline soil by MC than other heavy metals was mainly due to the higher complexing ability of Pb and Cu with the components in MC than those of other heavy metals. Although the high content of Zn in the original soil and the strong covalently bonding between Zn and soil particle (Thinh et al 2020), the MC had similar removal e ciency of Zn to the EDTA did after several times washing. This nding was most likely due to the easy leaching of Zn-EDTA complexes from soil after several times washing (Qi et al 2019).…”

Section: Effect Of Washing Times On the Removal E Ciencies Of Heavy M...mentioning

confidence: 88%

“…The stability constants of citric acid and GLDA with Cd, Cu and Zn were 3.50 and 9.10, 5.90 and 10.50, and 6.21 and 10.00, respectively (Jiang et al 2003). Evidently, the components of GLDA and citric acid in MC had relatively weaker complexing ability with heavy metals than EDTA did (Jean-Soro et al 2012; Thinh et al 2020). Therefore, the decrease in the amount of EDTA in MC resulted in the relatively lower removal e ciencies of heavy metals from the alkaline soil by MC than the EDTA treatment.…”

Section: Effect Of Washing Times On the Removal E Ciencies Of Heavy M...mentioning

confidence: 99%

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Effect of multiple washing operations on removal of heavy metals from an alkaline farmland soil and the strategy for agricultural reuse

Guo

Gao

Han

et al. 2022

Preprint

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Little study carried out the soil washing experiments using pot experiments to simulate in-situ soil washing operation, particularly for the alkaline soil. This study explored the effect of multiple washing operation using pot experiments on the removal efficiencies of heavy metals from the alkaline farmland soil and the reuse strategy of the washed soil for safe agricultural production. The results showed that the removal efficiencies of Cd, Pb, Cu and Zn after the seven times washing with the mixed chelator (EDTA, GLDA and citric acid) were 41.1%, 47.1%, 14.7% and 26.5%, respectively, which were close to those from the results of EDTA treatment. For the alkaline soil studied, the 2nd washing with the mixed chelator most effectively removed heavy metals owing to the activation of heavy metals after the first washing operation. The mixed chelator more effectively increased the proportion of stable speciation of heavy metals and maintained soil nutrients such as nitrogen content in soil than EDTA did, indicating the little disturbance of alkaline soil quality after being washed by the mixed chelator. After application of amendment into the washed soil, there was no visible difference in biomass weight of crops from the soil washed with different agents, indicating that the inhibitory effect of both washing agents on the plant growth was effectively alleviated. The Cd and Pb in Z. may were below the threshold of Hygienical Standard for Feeds of China (GB 13078 − 2017) (1 and 30 mg·kg− 1). Moreover, after three times of cropping, the concentrations of available heavy metals in the soil washed with the mixed chelator were lower than those in the washed soil with EDTA, indicating the value and potential of agricultural reuse of alkaline farmland soil being washed with the mixed chelator here.

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Section: Effect Of Washing Times On the Removal E Ciencies Of Heavy M...mentioning

confidence: 88%

Section: Effect Of Washing Times On the Removal E Ciencies Of Heavy M...mentioning

confidence: 99%

Effect of multiple washing operations on removal of heavy metals from an alkaline farmland soil and the strategy for agricultural reuse

Guo

Gao

Han

et al. 2022

Preprint

View full text Add to dashboard Cite

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“…In another stydy by [10], decreased heavy metal Pb by 96.5% by UV depuration after 48 hours. According to [11], under acidic conditions Pb metal can be released. The chelating content in the acid will cause the confinement of the heavy metal cation content in the material until an equilibrium occurs.…”

Section: Level Of Pbmentioning

confidence: 99%

Effectiveness of Liquid Smoke as a Source of Acetic Acid in Lowering Heavy Metals Levels in Blood Cockle (Anadara granosa)

Swastawati

Riyadi²,

Mulyono³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Blood cockle (Anadara granosa) can accumulate heavy metals in the waters. The purpose of this study was to analyze the heavy metal content of lead, cadmium, and arsenic in blood cockle in Jepara waters through fish landing area Kedung and to determine the effectiveness of liquid smoke as a source of acetic acid in reducing heavy metal in blood cockle. The addition of liquid smoke concentrations of 0%, 4%, 5%, and 6% in distilled water, then the blood cockle soaked for 60 minutes and repeated 3 times. Control and blood cockle soaked in liquid smoke were tested for heavy metals (ICP-MS), protein, water, pH, and organoleptic levels. Heavy metal levels of lead, cadmium and arsenic in blood cockle in Jepara were 0.41±0.08(mg/kg), 1.25±0.07(mg/kg), and 1.28±0.17(mg/kg). The results showed a significant difference P<5% in the reduction of heavy metals with liquid smoke. The lowest decreasing value at concentration of 4% of 25 until 27%, while the highest decrease was at a concentration of 6% 57 until 78%. Soaking blood cockle with liquid smoke as source of acetic acid effectively reduces heavy metal levels and maintains the quality of blood cockle.

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“…Soil washing and flushing technologies enhanced with chemical agents are widely used in the remediation practice for single type of pollutant (i.e., either heavy metals or organic contaminants) due to the features of short operation period and remarkable removal efficiency [10,11]. Chelators or surfactants have received better focus among the extractants because of their minimal impact on the soil characteristics while removing contaminants [12,13]. Aminopolycarboxylate chelators, such as ethylenediaminetetraacetic acid (EDTA) and S,Sethylenediaminedisuccinic acid (EDDS) and nonionic surfactants, e.g.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Washing Removal of Copper and Phenanthrene from Contaminated Soil with Sodium N-Lauroyl Ethylenediamine Triacetate

Diao¹,

Zhang²,

Ma³

et al. 2023

Pol. J. Environ. Stud.

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This study investigated the effectiveness of using a novel chelating surfactant, sodium N-lauroyl ethylenediamine triacetate (LED3A), on the removal of copper (Cu) and phenanthrene (Phe) simultaneously from artificially contaminated soil. The effects of operating conditions, such as the contact time, initial LED3A concentration, solution pH value and Cu/Phe combination of contaminated soil on the removal efficiencies were extensively examined by a series of batch tests. The results indicated that the equilibrium time (12 h) for Cu desorption was consistent with that of Phe, and the desorption processes of Cu and Phe could be well described by the Elovich and two-constant rate equations. Increasing the LED3A concentration improved effectively both Cu and Phe removal efficiencies, and at the optimum concentration of 18 g/L LED3A, the removal percentages of Cu and Phe were 60.40% and 52.27%, respectively. A wide pH value range from 5.0 to 9.0 was suitable for simultaneously removing of Cu and Phe from the co-contaminated soil. The removals of Cu and Phe were constrained each other in different degrees. The speciation analysis of contaminants in soil demonstrated that LED3A washing resulted in the decrease of the mobile fractions of Cu and Phe, and an increase in the fractions strongly bonded to the soil matrix, compared to their levels before washing. The use of LED3A as an extractant to enhance the removal of heavy metals and hydrophobic organic contaminants (HOCs) from co-contaminated soils appears as a promising remediation method.

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Removal of lead and other toxic metals in heavily contaminated soil using biodegradable chelators: GLDA, citric acid and ascorbic acid

Cited by 49 publications

References 55 publications

Effect of multiple washing operations on removal of heavy metals from an alkaline farmland soil and the strategy for agricultural reuse

Effect of multiple washing operations on removal of heavy metals from an alkaline farmland soil and the strategy for agricultural reuse

Effectiveness of Liquid Smoke as a Source of Acetic Acid in Lowering Heavy Metals Levels in Blood Cockle (Anadara granosa)

Simultaneous Washing Removal of Copper and Phenanthrene from Contaminated Soil with Sodium N-Lauroyl Ethylenediamine Triacetate

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