Teor e capacidade máxima de adsorção de arsênio em Latossolos brasileiros

Campos, Mari Lucia; Guilherme, Luiz Roberto Guimarães; Lopes, Rafael Siqueira; Antunes, Alessandra Silveira; Marques, João José; Curi, Nilton

doi:10.1590/s0100-06832007000600010

Cited by 24 publications

(14 citation statements)

References 30 publications

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“…O solo que apresentou o maior teor de As coletado na sub-região G foi o Plintossolo. Os valores muito baixos do índice Kr desse solo ( 0,85) ajudam a explicar tal tendência, em razão da maior capacidade de adsorver As desse sistema pedológico (Campos et al, 2007). Já o solo que apresentou o menor teor de As foi o Neossolo Quartzarênico da sub-região N, o que está associado aos menores teores de argila, hematita e à menor área superficial específica (Marques et al, 2004a,b), confirmando o grande fator de diluição do material psamítico do solo.…”

Section: Resultsunclassified

“…Os teores de Cd e As obtidos para Latossolos do Cerrado neste estudo (Quadro 4) encontram-se abaixo do observado para 17 Latossolos coletados em diferentes regiões do Brasil, sendo os teores médios observados para aqueles solos de 660 ± 200 µg kg -1 de Cd (Campos et al, 2003) e de 5,92 mg kg -1 , de As (Campos et al, 2007). Paye et al (2010) encontraram teor de As de 6,8 mg kg -1 e de Cd, menor que o limite de detecção do método (< 130 µg kg -1 de Cd ) em solos do Espírito Santo.…”

Section: Resultsunclassified

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Teores de arsênio e cádmio em solos do bioma cerrado

Campos

Guilherme

Marques

et al. 2013

Rev. Bras. Ciênc. Solo

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Section: Resultsunclassified

Teores de arsênio e cádmio em solos do bioma cerrado

Campos

Guilherme

Marques

et al. 2013

Rev. Bras. Ciênc. Solo

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“…Non-contaminated soil samples were considered as controls. These target levels were chosen with reference to the investigation values of the Brazilian National Environment Council (Conselho Nacional do Meio Ambiente-CONAMA 2009) for agricultural and industrial soil, even though values close to 35 mg dm −3 have been reported as background levels in Brazilian soils (Campos et al 2007). After addition of the solutions, the soils with and without As loading were incubated at room temperature for 30 days, with soil moisture maintained at 60% waterholding capacity.…”

Section: Characterization Of the Experimental Areamentioning

confidence: 99%

Availability and Accumulation of Arsenic in Oilseeds Grown in Contaminated Soils

Melo

Guilherme

Nascimento

et al. 2011

Water Air Soil Pollut

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Arsenic occurs in the earth's crust in various chemical forms as a result of both natural and anthropogenic sources. Soil chemical extractions may help understand As availability, as well as the possibility of As entry into the food chain. Phytoextraction has been proposed as a technology for remediation of As-contaminated soils. The study was carried out to assess the bioavailability of As by extractants and to compare the performance of castor bean and sunflower for As removal from soils. Two soils were contaminated with Na 2 HAsO 4 .7H 2 O adding 35 and 150 mg As dm −3 soil. Arsenic availability was assessed using the following extractants: tri-distilled water, ammonium sulfate, ammonium phosphate, ammonium oxalate+oxalic acid, organic acids mixture, Mehlich-1, and United States Environmental Protection Agency 3051. The roots and shoots of 35-day-old plants were collected and dry matter yield as well asAs concentration were determined. The accumulation of As in shoot was also calculated in order to evaluate the plants potential for As phytoextraction. The extractants tested were efficient to assess the concentration of available As in soil. Addition of As to the soils did not cause severe toxicity in plants, although the dose 150 mg As dm −3 soil decreased shoot and root yield in both species. Castor bean was less sensitive to As than sunflower, but none of the species had hyperaccumulation characteristics. These species can be used for revegetation of areas contaminated with As up to safe limit of 150 mg As dm −3 soil, as proposed by CONAMA for industrial areas in Brazil.

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“…Uma das formas mais utilizadas é a determinação da capacidade máxima de adsorção de elementos potencialmente tóxicos do solo (CMA) (CAMPOS et al, 2007;MENDONÇA et al, 2013;PIERANGELI et al, 2001). Através dos valores de CMA pode-se inferir sobre a capacidade tampão do solo e assim definir estratégias de prevenção e/ou remediação de áreas contaminadas por elementos potencialmente tóxicos.…”

Section: Introductionunclassified

Adsorption of arsenate (HAsO42-) by the clay fraction of soils of the Keller and Barton Peninsulas, King George Island, Maritime Antarctic

Pôggere

Melo

Francelino

et al. 2017

Revista Ciência Agronômica

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RESUMO -Objetivou-se determinar a capacidade máxima de adsorção de As(V) na forma de HAsO 4 2-(CMAAs) pela fração argila de solos em diferentes ambientes nas Penínsulas Keller e Barton, Ilha Rei George, Antártica Marítima. Foram realizadas análises química e granulométrica na terra fina seca ao ar, e na fração argila quantificou-se o material amorfo e a CMAAs. Os dados das análises químicas, granulometrica e da fração argila foram correlacionados com a CMAAs. A CMAAs foi baixa (3.554 mg kg ABSTRACT -The aim of this study was to determine the maximum capacity for the adsorption of As(V) in the form of HAsO 4 2-(MACAs) by the clay fraction of soils in different environments of the Keller and Barton Peninsulas, King George Island, Maritime Antarctic. Chemical and particle size analyses were carried out on air-dried fine earth. The amorphous material and MACAs in the clay fraction were quantified. Data from the chemical analysis, particle size analysis and clay fraction were correlated with the MACAs. The MACAs was low (3,554 mg kg -1 ), with the profile under the ornithological influence of penguins displaying the highest values. The basic pH of the saturated solutions did not favour the adsorption of the deprotonated HAsO 4 2-species. The amount of clay in the soil was less important than the mineralogical composition in the dynamics of HAsO 4 2-retention, with the amorphous oxides of Al and Fe being mainly responsible for the adsorption of the pollutant.

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Teor e capacidade máxima de adsorção de arsênio em Latossolos brasileiros

Cited by 24 publications

References 30 publications

Teores de arsênio e cádmio em solos do bioma cerrado

Teores de arsênio e cádmio em solos do bioma cerrado

Availability and Accumulation of Arsenic in Oilseeds Grown in Contaminated Soils

Adsorption of arsenate (HAsO42-) by the clay fraction of soils of the Keller and Barton Peninsulas, King George Island, Maritime Antarctic

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