Short‐Term Effect of Lime, Phosphorus, and Iron Amendments on Water‐Extractable Lead and Arsenic in Orchard Soils

Codling, Eton E.; Dao, Thanh H.

doi:10.1080/00103620701277783

Cited by 25 publications

(15 citation statements)

References 28 publications

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“…An alternative explanation regarding the relationships between the soil pH, DOC and enzyme activities involved the masking effect from higher concentrations of As WS fractions in both mine tailings (Bhattacharyya et al 2008). In fact, concentrations of As WS fractions in the present study were higher than those observed in previous studies using As-contaminated agricultural soils (Bhattacharyya et al 2008), As-contaminated landfill site soils (Hartley et al 2004) and As-contaminated orchard soils (Codling and Dao 2007). It was concluded from these statistical analyses that the equation with As WS fraction gave the best prediction of the soil enzyme activities in both mine tailings samples.…”

Section: As Fractionationcontrasting

confidence: 82%

“…In the present study, treatments with ZVI largely reduced both the As WS and As NSS fractions. Generally, Fe oxide has a high affinity for the adsorption of As; therefore, the mobility of As in soils is markedly associated with the presence of Fe oxide on the soil surface (Codling and Dao 2007). Of the many Fe sources, Fe(II) with SO 4 and ZVI are well known and commonly used as stabilizing agents for As (Koo et al 2011b;Kumpiene et al 2008).…”

Section: As Fractionationmentioning

confidence: 99%

“…Of these, the incorporation of various soil amendments, containing adsorptive sources of As, into contaminated soils has been recognized as a cost-effective and environmentally friendly technique (Codling and Dao 2007). Actually, chemical stabilization of As using soil amendments is considered for remediating As-contaminated soils, and possible amendments for reducing the availability of toxic element and improving soil quality have been reported in many investigations (Koo et al 2011b;Subacz et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Arsenic mobility in the amended mine tailings and its impact on soil enzyme activity

Koo

Lee²,

Kim

2011

Environ Geochem Health

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The objectives of this study were to elucidate the effects of soil amendments [Ferrous sulfate (Fe(II)), red mud, Fe(II) with calcium carbonate (Fe(II)/L) or red mud (RM/F), zero-valent iron (ZVI), furnace slag, spent mushroom waste and by-product fertilizer] on arsenic (As) stabilization and to establish relationships between soil properties, As fractions and soil enzyme activities in amended As-rich gold mine tailings (Kangwon and Keumkey). Following the application of amendments, a sequential extraction test and evaluation of the soil enzyme activities (dehydrogenase and β-glucosidase) were conducted. Weak and negative relationships were observed between water-soluble As fractions (As(WS)) and oxalate extractable iron, while As(WS) was mainly affected by dissolved organic carbon in alkaline tailings sample (Kangwon) and by soil pH in acidic tailings sample (Keumkey). The soil enzyme activities in both tailings were mainly associated with As(WS). Principal component and multiple regression analyses confirmed that As(WS) was the most important factor to soil enzyme activities. However, with some of the treatments in Keumkey, contrary results were observed due to increased water-soluble heavy metals and carbon sources. In conclusion, our results suggest that to simultaneously achieve decreased As(WS) and increased soil enzyme activities, Kangwon tailings should be amended with Fe(II), Fe(II)/L or ZVI, while only ZVI or RM/F would be suitable for Keumkey tailings. Despite the limitations of specific soil samples, this result can be expected to provide useful information on developing a successful remediation strategy of As-contaminated soils.

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Section: As Fractionationcontrasting

confidence: 82%

Section: As Fractionationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Arsenic mobility in the amended mine tailings and its impact on soil enzyme activity

Koo

Lee²,

Kim

2011

Environ Geochem Health

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“…Inorganic As can be relatively mobile in soils in both oxidation states [55,56], particularly in alkaline soils. Arsenic may form insoluble compounds with Fe and Al oxides [56,57], be adsorbed to organic matter or hydroxyl groups on clay minerals [58], and be desorbed from these sites by phosphate fertilizers [57]. However, Huang and Matzner [55] argued that sorption by organic matter was of minor importance in most soils.…”

Section: Arsenicmentioning

confidence: 99%

Fertilizer‐Borne Trace Element Contaminants in Soils

Stacey

McLaughlin

Hettiarachchi

2010

Trace Elements in Soils

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“…As formas oxianiônicas de arsênio nos solos ricos em óxidos de ferro, estão envolvidas na adsorção específica desse elemento (Waychunas et al, 1993;Bhattacharya et al, 2007) e competem com os fosfatos (Wasay et al, 2000). A remoção do arsênio por dessorção com soluções de fosfato tem sido usada para lavagem deste elemento em solos contaminados (Codling & Dao, 2007). Nesta técnica, é necessário que, posteriormente, se trate o efluente gerado sendo que a remoção do arsênio de efluentes contaminados tem sido realizada por coagulação, sedimentação e filtração (Nguyen et al, 2006).…”

Section: Introductionunclassified

Uso de fosfato para remoção de arsênio de solo contaminado

Silva

Sobrinho

Mazur

2010

Rev. bras. eng. agríc. ambient.

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RESUMOQuando da opção do procedimento de remediação de solos contaminados com metais pesados para determinado sítio, deve-se levar em consideração dados do sítio e do contaminante, o grau de contaminação, o uso futuro da área e a viabilidade econômica do processo de remediação. A Cia. Mercantil Ingá, localizada no município de Itaguaí, RJ, extraía zinco da calamina através do processo de hidrometalurgia. Durante 31 anos a empresa dispôs, no seu pátio e de forma inadequada, cerca de 3 milhões de toneladas de resíduo perigoso. Uma das etapas do processo de extração do zinco consistia na adição de trióxido de arsênio para a remoção de impurezas, tendo-se verificado contaminação do solo com arsênio de áreas próximas ao local de disposição do resíduo. Dentro deste contexto se avaliou, no presente estudo, a técnica de remediação ex situ, através da remoção por lavagem de solo contaminado com arsênio, e o tratamento do efluente gerado da lavagem. O fracionamento mostrou que a diminuição do pH aumentou a retenção do arsênio. O diidrogenofosfato de potássio 0,4 mol L -1 mostrou-se eficiente na remoção por dessorção do arsênio presente no solo contaminado, conseguindo dessorver cerca de 70% deste elemento em pH 6,2. O cloreto férrico foi mais eficiente que o sulfato de alumínio para a remoção por coagulação, do arsênio do efluente da lavagem do solo.Palavras-chave: remediação ex situ, Cia. Mercantil Ingá, coagulação, cloreto férrico, sulfato de alumínio Use of phosphate for removal of arsenic from contaminated soil ABSTRACT Several remediation procedures for soils contaminated with heavy metals are based on decontamination or stabilization. The selection of one of them for a given site should take data regarding the site and the contaminating agent, contamination degree, future use of the site and the economic viability of remediation process into account. The Mercantil Ingá Company, located in the municipality of Itaguaí -RJ, Brazil, has extracted zinc from calamine through hydrometallurgy. During 31 years, the company improperly disposed of about three million tons of hazardous residues in its area. One of the stages of the zinc extraction process consists of the addition of arsenic trioxide for the removal of impurities and the soil was contaminated with arsenic from areas near sites where the hazardous residues were disposed. In this context, this study evaluated the ex situ remediation technique through removal by leaching the contaminated soil with arsenic, and the treatment of the effluent generated. The fractioning showed that the pH reduction increased the arsenic retention. The potassium dihydrogenophosphate concentration in 0.4 mol L -1 seemed to be efficient in the removal of the arsenic present in the contaminated soil, achieving the dissolution of about 70% of this element at pH 6.2. The ferric chloride was more efficient than the aluminum sulphate for the removal, through coagulation, of the arsenic present in the effluent generated in the soil leaching.

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Short‐Term Effect of Lime, Phosphorus, and Iron Amendments on Water‐Extractable Lead and Arsenic in Orchard Soils

Cited by 25 publications

References 28 publications

Arsenic mobility in the amended mine tailings and its impact on soil enzyme activity

Arsenic mobility in the amended mine tailings and its impact on soil enzyme activity

Fertilizer‐Borne Trace Element Contaminants in Soils

Uso de fosfato para remoção de arsênio de solo contaminado

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