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      Adsorção de arsenato (HAsO42-) pela fração argila de solos das Penínsulas Keller e Barton, ilha Rei George, Antártica Marítima Translated title: 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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          Abstract

          RESUMO Objetivou-se determinar a capacidade máxima de adsorção de As(V) na forma de HAsO42- (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-1), sendo o perfil com influência ornitogênica de pinguins o que apresentou os maiores valores. O pH básico das soluções de saturação não favoreceu a adsorção da espécie desprotonada HAsO42-. A quantidade de argila dos solos foi menos importante que a composição mineralógica na dinâmica de retenção de HAsO42-, sendo que os óxidos de Al e Fe amorfos foram os principais responsáveis pela adsorção desse poluente.

          Translated abstract

          ABSTRACT The aim of this study was to determine the maximum capacity for the adsorption of As(V) in the form of HAsO42- (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 HAsO42- species. The amount of clay in the soil was less important than the mineralogical composition in the dynamics of HAsO42- retention, with the amorphous oxides of Al and Fe being mainly responsible for the adsorption of the pollutant.

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          USE OF OXALATE FOR FE EXTRACTION FROM SOILS

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            Soil chemical analysis

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              World Reference Base for Soil Resource

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rca
                Revista Ciência Agronômica
                Rev. Ciênc. Agron.
                Universidade Federal do Ceará
                1806-6690
                March 2017
                : 48
                : 1
                : 13-21
                Affiliations
                [1 ] Universidade Federal de Lavras Brazil
                [2 ] Universidade Federal do Paraná Brazil
                [3 ] Universidade Federal de Viçosa Brazil
                [4 ] Universidade Federal de Viçosa Brazil
                Article
                S1806-66902017000100013
                10.5935/1806-6690.20170002
                f9831da8-9743-4457-95e2-b75b3cb3e63d

                This work is licensed under a Creative Commons Attribution 4.0 International License.

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1806-6690&lng=en
                Categories
                AGRONOMY

                Horticulture
                Poluição ambiental,Adsorção específica e não específica,Material amorfo,Environmental pollution,Specific and non-specific adsorption,Amorphous material

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