Comportamento do mercúrio em perfis de solos do sítio Ilha de Terra-Caxiuanã, Pará

Gurjão, Robson da Silva; Lemos, Vanda Porpino; Costa, Marcondes Lima da; Filho, Heronides Adonias Dantas; Dantas, Kelly das Graças Fernandes; Lima, Wivian Thais dos Santos; Kern, Dirse Clara

doi:10.1590/s0100-40422010000400011

Cited by 4 publications

(3 citation statements)

References 15 publications

(20 reference statements)

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“…Antes da ocupação humana os solos desses perfis deveriam constituir uma única unidade de solo, mas as atividades desenvolvidas pelos antigos habitantes da região durante longo período de tempo provocaram mudanças nos horizontes superiores desta unidade de solo (Gurjão et al 2010).…”

Section: Introductionunclassified

Mineralogia e geoquímica de perfis de solo com Terra Preta Arqueológica de Bom Jesus do Tocantins, sudeste da Amazônia

et al. 2012

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A comparação de dados morfológicos, mineralógicos e químicos de solo com horizontes antrópicos -Terra Preta Arqueológica (TPA) com Argissolos adjacentes permitiu identificar os principais processos responsáveis pela formação da TPA em um sítio arqueológico no Município de Bom Jesus do Tocantins, sudeste do Estado do Pará. A similaridade entre os dados dos horizontes subsuperficiais do solo com TPA e solos adjacentes indica que o horizonte antrópico do solo TPA foi provavelmente desenvolvido a partir de um horizonte similar aos Argissolos adjacentes com posterior transformação pedogenética através da introdução de materiais orgânicos e inorgânicos por antigas colonizações humanas, resultando no espessamento do horizonte superficial e em concentrações maiores de CaO e P 2 O 5 (teores totais), Zn (teor traço), P e Zn disponível (teores disponíveis), além de Ca e Mg trocáveis (teores trocáveis) em relação aos Argissolos adjacentes. Além disso, essa intervenção antrópica antiga também provocou modificações no horizonte subsuperficial do Argissolo com TPA, como concentrações altas de P 2 O 5 e principalmente P disponível. O Soil Taxonomy e o Sistema Brasileiro de Classificação de Solos (SiBCS) são adequados para a identificação de solo com horizonte antrópico (p.exe. TPA), uma vez que priorizam nas ordens do solo os principais processos pedogenéticos atuantes na formação do solo, relacionados aos horizontes subsuperficiais, além das transformações pedogenéticas posteriores no horizonte superficial. Contudo, este trabalho recomenda o acréscimo de alguns atributos diagnósticos como quantidade de artefatos cerâmicos e líticos, P 2 O 5 , P e Zn disponíveis, C orgânico, Ca 2+ + Mg 2+ (teores trocáveis), CTC e índice de saturação por bases no horizonte superficial para o agrupamento e distinção dos diversos tipos de solos antrópicos antigos da Amazônia. PALAVRAS-CHAVE: Mineralogia, Pré-história, Região Amazônica, Pedologia. Mineralogy and geochemistry of soil profiles with Archeological Black Earth from Bom Jesus do Tocantins, southeastern Amazon ABSTRACTThe comparison of morphological, mineralogical and chemical data of a soil with anthropic horizons -Archeological Black Earth (ABE) and surrounding Argissolos (Typic Kandiudox or Ultisols) allowed the identification of the main process acting on the ABE formation from the town of Bom Jesus do Tocantins, southeastern Pará State. The similarity between the data in the subsurface horizons of ABE and surrounding soils indicates that the former was likely developed from Argissolos with later pedogenetic transformation by the input of organic and inorganic materials from ancient human settlements, which resulted in thickness of the surface horizon and higher concentrations of CaO and P 2 O 5 (total content), Zn (trace content), available P and Zn (available content), and exchangeable Ca and Mg (exchangeable content) compared to surrounding Argissolos. Furthermore, such anthropic disturbance also resulted in changes in the subsurface horizon of Argissolos with ABE, such as high co...

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Section: Introductionunclassified

Mineralogia e geoquímica de perfis de solo com Terra Preta Arqueológica de Bom Jesus do Tocantins, sudeste da Amazônia

et al. 2012

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“…According to other authors the more stable Hg forms, as cinnabar, tend to be accumulated in deeper proles. 66 However, in this case the higher concentrations in upper proles may be indicative of an important input of Hg as small particles of cinnabar, i.e. from non-processed ore as observed in previous studies on soils.…”

Section: Mobility and Availability Of Hgmentioning

confidence: 55%

“…This behavior has been observed in other studies indicating that Hg retention in these proles is partially controlled by the amount of organic matter. [64][65][66] The percentages of elemental Hg and Hg bound to the crystalline oxide fraction (F3) ranged between 9% and 33%, with 25% being the average value. Although this fraction accounts for both elemental and crystalline iron oxides, very poor Hg recoveries were obtained from the application of DCB extraction, with #2% being the total of Hg contents for all the studied samples (Table 3).…”

Section: Mobility and Availability Of Hgmentioning

confidence: 99%

Total mercury, organic mercury and mercury fractionation in soil profiles from the Almadén mercury mine area

Fernández-Martínez

Rucandio

2014

Environ. Sci.: Processes Impacts

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Soil profiles located in the mining district of Almadén were investigated for total Hg, organic Hg fraction and Hg distribution by selective sequential extraction. A four-step sequential extraction method (labile Hg species, humic and fulvic complexes, elemental Hg and bound to crystalline oxides and Hg sulfide and refractory species) was performed. Total Hg concentrations ranged from 13 to 64 mg per kg dry mass. A clear relationship between the depth and Hg content was found since Hg concentration decreases downwards, which is indicative of anthropogenic contamination via deposition processes from nearby mine waste. Significant organic Hg concentrations were found in all the tested soil profiles ranging from 79 to 287 μg kg(-1) (dry weight). It seems that organic Hg was strongly influenced by elemental Hg (r = 0.79) and to a lesser extent by the organic carbon content (r = 0.57). The fractionation revealed that Hg exists mainly as cinnabar in the studied soils, which is one of the least available and mobile Hg species, and as elemental Hg as well. The most mobile Hg fractions only accounted for 3.2 to 7.7% of the total Hg content, with the main contribution being the humic and fulvic complexes fraction. The elemental Hg fraction increased with depth indicating a migration to deeper soil layers. In contrast, the surface layers showed an enrichment in the fraction bound to sulfide, which means that Hg is mostly deposited as cinnabar particles from non-processed ore in this area.

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Use of a direct mercury analyzer® for mercury speciation in different matrices without sample preparation

Windmöller¹,

Silva²,

Andrade³

et al. 2017

Anal. Methods

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Comportamento do mercúrio em perfis de solos do sítio Ilha de Terra-Caxiuanã, Pará

Cited by 4 publications

References 15 publications

Mineralogia e geoquímica de perfis de solo com Terra Preta Arqueológica de Bom Jesus do Tocantins, sudeste da Amazônia

Mineralogia e geoquímica de perfis de solo com Terra Preta Arqueológica de Bom Jesus do Tocantins, sudeste da Amazônia

Total mercury, organic mercury and mercury fractionation in soil profiles from the Almadén mercury mine area

Use of a direct mercury analyzer® for mercury speciation in different matrices without sample preparation

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