Factors affecting EDTA extraction of lead from lead-contaminated soils

Kim, Chul-Sung; Lee, Yong-Woo; Ong, Say Kee

doi:10.1016/s0045-6535(03)00155-3

Cited by 175 publications

(109 citation statements)

References 11 publications

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“…Comparing the results of this study with others about soil metal concentration around lead battery smelters, the total lead concentration found in this study were lower than the ones reported in the USA by Elliott and Brown (1989) and Austin et al (1993), (21% w/w and 30,000 mg kg -1 respectively), but similar to those found by Kim et al (2003) (13,260 mg kg -1 ), also in the USA, and higher than those found by Eckel et al (2002) The relation between pseudototal and 0.5 M HCl extractable concentrations for Pb was surprisingly elevated, these values could indicate that Pb is not strongly bounded to soil.…”

supporting

confidence: 84%

Lead accumulation in plants grown in polluted soils. Screening of native species for phytoremediation

Salazar

Pignata

2014

Journal of Geochemical Exploration

122

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In the present work, we focused on soils contaminated with elevated lead concentrations in an agricultural and residential area surrounding a lead smelter plant in Bouwer, province of Córdoba, Argentina. The aim of this research work was to assess the phytoextraction suitability of native plant species growing in the vicinity of a former lead smelter.The lead concentration in leaves, stems and roots was determined in ten species collected at ten sampling sites along a lead concentration gradient in soil. It was found that at circa 1,600 μg g -1 Pb HCl 0,5 M extractable concentration in soil two native species, Tagetes minuta L.

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supporting

confidence: 84%

Lead accumulation in plants grown in polluted soils. Screening of native species for phytoremediation

Salazar

Pignata

2014

Journal of Geochemical Exploration

122

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“…The addition of EDTA also led to an increase in the concentration of Pb in the roots. The induction of Pb uptake by plant roots has also been observed by other authors (DOUMETT et al, 2008;KIM et al, 2003;LESTAN et al, 2007) and is in agreement with the geochemical fractionation results (Table 2). Although no significant difference was found in the geochemical fractionation of Pb among the different treatments (Table 2), increased Pb absorption may have occurred due to the acidification of the medium in the region of the rhizosphere, which would increase the formation of soluble complexes around the roots.…”

Section: Resultssupporting

confidence: 92%

“…Among the many chelating agents used to enhance phytoextraction, ethylene-diaminetetraacetic acid (EDTA) has been shown to be very efficient in forming soluble complexes with metals, especially for the removal of Pb (DOUMET et al, 2008;KIM et al, 2003;LESTAN et al, 2007;XIA et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

<b>EDTA-induced phytoextraction of lead and barium by brachiaria (<i>B. decumbens</i> cv. Basilisk) in soil contaminated by oil exploration drilling waste

et al. 2014

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ABSTRACT. The phytoextraction of heavy metals using chelating agents has been widely studied for the remediation of contaminated soils. To evaluate the efficiency of EDTA-induced phytoextraction of Ba and Pb using Brachiaria decumbens for the remediation of soil contaminated by oil well drilling and exploration waste, an experiment was conducted by applying a single dose (6 mmol EDTA kg -1 soil) and split doses of EDTA (three applications of 2 mmol EDTA kg -1 soil). The samples were subjected to sequential extractions using the method proposed by Ure et al. (1993) as modified by Rauret et al. (1999).The application of EDTA did not influence the distribution of Ba in various chemical fractions of the soil. The dry matter production did not differ significantly between the treatments and the control, thereby demonstrating the tolerance of plants to the experimental conditions. The absorption of Pb by plants was influenced by the application of EDTA. The application of a single dose of EDTA influenced the absorption of Pb and its translocation to the aerial plant parts. The application of split doses favoured higher accumulation of Pb in roots. Because of its tolerance to heavy metals and EDTA, B. decumbens has the potential to be used in phytostabilisation.Keywords: heavy metals, phytoremediation, chelating compounds.Uso de EDTA na fitoextração induzida de chumbo e bário por braquiária (B. decumbens cv. Basilisk) em solo contaminado por resíduos de perfuração de poços de petróleo RESUMO. A fitoextração de metais pesados usando agentes quelantes tem sido amplamente estudado para a remediação de solos contaminados. Para avaliar a eficiência do EDTA na fitoextração induzida de Ba e Pb, usando Brachiaria decumbens para a remediação de solos contaminados por perfuração poço de petróleo e resíduos de exploração, foi conduzido um experimento, aplicando uma dose única (6 mmol EDTA kg -1 solo) e divisão de doses de EDTA (três aplicações de 2 mmol EDTA kg -1 solo). As amostras foram submetidas a extrações sequenciais com o método proposto por Ure et al. (1993), conforme modificado por Rauret et al. (1999). A aplicação de EDTA não influenciou a distribuição do Ba nas diferentes frações geoquímicas. A produção de matéria seca não diferiu significativamente entre os tratamentos e o controle, demonstrando assim a tolerância das plantas com as condições experimentais. Houve maior absorção de Pb pelas plantas com a aplicação de EDTA. A aplicação de uma dose única de EDTA influenciou a absorção de Pb e sua translocação para a parte aérea das plantas. A aplicação dividida das doses favoreceu maior acúmulo de Pb nas raízes. Devido à sua tolerância para os metais pesados EDTA, B. decumbens tem o potencial para ser utilizado em fitoestabilização.Palavras-chave: metais pesados, fitorremediação, compostos quelantes.

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“…Lead is a common heavy metal found in industrial effluents, particularly in developing countries, where legislative measures of control are either lacking or are not being strictly enforced [1]. The main sources of lead contamination are mining and smelting activities, batteries, paints and automobiles [2][3] [4] . Over 40 million children worldwide are threatened by lead poisoning and 97% of them are living in developing countries [5] .…”

Section: Introductionmentioning

confidence: 99%

Decontamination of Lead from aquatic environment by exploitation of floating macrophyte Azolla microphylla Kauf

Mishra¹,

Pradhan²,

Bihari³

et al. 2014

IOSRJESTFT

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Factors affecting EDTA extraction of lead from lead-contaminated soils

Cited by 175 publications

References 11 publications

Lead accumulation in plants grown in polluted soils. Screening of native species for phytoremediation

Lead accumulation in plants grown in polluted soils. Screening of native species for phytoremediation

<b>EDTA-induced phytoextraction of lead and barium by brachiaria (<i>B. decumbens</i> cv. Basilisk) in soil contaminated by oil exploration drilling waste

Decontamination of Lead from aquatic environment by exploitation of floating macrophyte Azolla microphylla Kauf

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