Effect of chemical amendments on the concentration of cadmium and lead in long-term contaminated soils

Lee, Tse-Ming; Lai, Hung-Yu; Chen, Zueng‐Sang

doi:10.1016/j.chemosphere.2004.08.094

Cited by 93 publications

(49 citation statements)

References 33 publications

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“…For the treatments with EDTA, the saturation extract (soil solution) was the less effective in predicting the soil-Pb availability as compared to DTPA and Mehlich-3 extracts. These findings are consistent with a previous study that did not show correlation between the soil solution-Pb and the one found in wheat leaves (Lee et al, 2004). ).…”

Section: Soil Pb Availabilitysupporting

confidence: 83%

Pb-phytoextraction by maize in a Pb-EDTA treated Oxisol

Pereira

Abreu²,

Romeiro³

et al. 2007

Sci. agric. (Piracicaba, Braz.)

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One of the most viable strategies to restore metal contaminated soils is the introduction of plants specialized in their accumulation or able to tolerate very high metal concentrations. This research evaluated: i. the maize as a Pb-accumulator plant; ii. the effects of EDTA-chelating agent for Pb-uptake by maize; iii. amending effect of EDTA on the soil Pb-availability using different extracts. ) and without EDTA. Lead concentrations were determined in maize plant shoots. Soil available Pb was obtained using DTPA, Mehlich-3 and saturation solutions methods. Ionic speciation in the soil solution was performed using the software Visual-Minteq. Although a low t value was found (t <0.70), Pb concentration were high (>1,500 mg kg -1 of Pb) in maize shoots regardless of EDTA addition. Maize plants treated with EDTA had lower dry matter yield, mainly due to toxic levels of Fe and Al of the Oxisol. All extracting solutions were effective to determine available Pb in soil samples, but the saturation extract is a more difficult and time consuming procedure. At low and medium Pb levels, the plants grew less on EDTA, therefore the phytoextration process was less efficient. The addition of EDTA to the soil is not recommended with the purpose of increasing Pb absorption by maize plants. ) e sem EDTA. A concentração de Pb foi determinada na parte aérea das plantas de milho, e no solo determinou-se o Pb disponível pelos métodos DTPA, Mehlich-3 e pasta de saturação. A especiação iônica da solução do solo foi determinada utilizando-se o software Visual-Minteq. Embora tenha sido encontrado um baixo valor t (t <0.70), a concentração de Pb na parte aérea do milho foi alta (>1.500 mg kg -1 ), independente da adição de EDTA. As plantas de milho que receberam EDTA apresentaram redução na massa seca, principalmente devido aos níveis tóxicos de Fe e Al do Latossolo. Todas as soluções extratoras utilizadas foram eficientes em determinar o Pb disponível nas amostras de solo, mas a pasta de saturação foi o processo mais trabalhoso. Em baixa e média concentração de Pb no solo as plantas cresceram menos com EDTA, portanto a fitoextração foi menos eficiente. Não é recomendada a adição de EDTA no solo buscando aumentar a absorção de Pb pelas plantas de milho. Palavras-chave: Mehlich-3, DTPA, fitorremediação, Pb disponível, especiação iônica

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Section: Soil Pb Availabilitysupporting

confidence: 83%

Pb-phytoextraction by maize in a Pb-EDTA treated Oxisol

Pereira

Abreu²,

Romeiro³

et al. 2007

Sci. agric. (Piracicaba, Braz.)

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“…석회질 재료는 토양 pH를 증가시켜 중금속의 용출성 을 저감시키기 위해 가장 널리 사용되는 대표적인 알칼리 재료이다 (Basta and McGowen, 2004;Lee et al, 2004 (Hartley et al, 2004;Kumpiene et al, 2008).…”

Section: 현재 대부분의 폐금속 광산 주변 오염농경지 복원사업unclassified

An Investigation of Treatment Effects of Limestone and Steel Refining Slag for Stabilization of Arsenic and Heavy Metal in the Farmland Soils nearby Abandoned Metal Mine

Woo¹,

Kang²,

Jin³

et al. 2011

Korean Journal of Soil Science and Fertilizer

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A soil stabilization method is an effective and practical remediation alternative for arsenic (As) and heavy metal contaminated farmland soils nearby abandoned metal mine in Korea. This method is a technique whereby amendments are incorporated and mixed with a contaminated soil. Toxic metal bind to the amendments, which reduce their mobility in soil, so the successful stabilization of multi-element contaminated soil depends on the combination of critical elements in the soil and the type of amendments. The objective of this study is to investigate the treatment effects and applicability of limestone (LS) and steel refining slag (SRS) as the amendment for farmland soil contaminated with As and heavy metals, and a lab-column test was conducted for achieving this purpose. The result showed that soil treated with LS and SRS maintained pH buffer capacity and, as a result, the heavy metal leaching concentration was quite low below the water quality standard compared to untreated soil which leachate exceeding the water quality standard was observed, however, the arsenic concentration rather increased with increasing mixture ratio of SRS. This was believed to be related to phosphorus (P) contained in SRS, and dominancy in the competitive adsorption relation between As and P binding strongly to iron might be different according to soil characteristic. We suggested that LS is a effective amendment for reducing heavy metals in soil, and SRS should be used after investigating its applicability based on the adsorption selectivity of arsenic and phosphorus in selected soil.

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“…Farm yard manure (FYM) improves the crop production (Kaihura et al, 1999) as well as improves soil physical properties (Chen et al, 1996) and can be used to reduce heavy metal hazards in plants (Yassen et al, 2007). Organic matter with respective groups such as hydroxyl, phenolic and carboxyl effectively controls the adsorption and complexation of heavy metal and the activity of metal in the soil (Lee et al, 2004;Mahmood, 2010).…”

Section: Issn: 2319-7706 Volume 7 Number 06 (2018)mentioning

confidence: 99%