Search Results - "Jorge Carvalho de Lena"

Speciation and quantification of Hg in sediments contaminated by artisanal gold mining in the Gualaxo do Norte River, Minas Gerais, SE, Brazil by da Penha Rhodes, Valdilene, de Lena, Jorge Carvalho, Santolin, Camila Vidal Alves, da Silva Pinto, Thais, Mendes, Louise Aparecida, Windmöller, Cláudia Carvalhinho

“…The Iron Quadrangle in SE Brazil was, in the eighteenth century, one of the most important Au producing regions of Brazil. In this region, gold is produced,…”
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Avaliação em laboratório do uso de sistemas de coberturas alcalinas para prevenção da drenagem ácida de mina by Adriana Trópia de Abreu, Efigênia Miranda de Faria, Juliana Alves Costa Guimarães, Adilson do Lago Leite, Jorge Carvalho de Lena

“…A drenagem ácida de mina (DAM) é um problema ambiental em escala mundial. Ela é proveniente do processo de oxidação química de materiais da mineração que…”
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Adsorption of chromium (VI) ion from aqueous solution by succinylated mercerized cellulose functionalized with quaternary ammonium groups by Gurgel, Leandro Vinícius Alves, Perin de Melo, Júlio César, de Lena, Jorge Carvalho, Gil, Laurent Frédéric

“…Succinylated mercerized cellulose (cell 1) was used to synthesize an anion exchange resin. Cell 1, containing carboxylic acid groups was reacted with…”
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Avaliação de risco à saúde humana por contaminação natural de arsênio nas águas subterrâneas e nos solos da área urbana de Ouro Preto (MG) by Gonçalves, José Augusto Costa, Lena, Jorge Carvalho de

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Adsorção de As, Cu, Pb e Cr na avaliação da capacidade de fixação de metais por resíduo de mineradoras de ferro by Basílio, Márcio Silva, Friese, Kurt, Lena, Jorge Carvalho de, Nalini Júnior, Hermínio Arias, Roeser, Hubert Mathias Peter

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Evaluation of matrix effect on the determination of rare earth elements and As, Bi, Cd, Pb, Se and In in honey and pollen of native Brazilian bees (Tetragonisca angustula – Jataí) by Q-ICP-MS by de Oliveira, Fernanda Ataide, de Abreu, Adriana Trópia, de Oliveira Nascimento, Nathália, Froes-Silva, Roberta Eliane Santos, Antonini, Yasmine, Nalini, Hermínio Arias, de Lena, Jorge Carvalho

“…Bees are considered the main pollinators in natural and agricultural environments. Chemical elements from honey and pollen have been used for monitoring the…”
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Quantification of methylmercury and geochemistry of mercury in sediments from a contaminated area of Descoberto (MG), Brazil by Mendes, Louise Aparecida, de Lena, Jorge Carvalho, do Valle, Cláudia Magalhães, Fleming, Peter Marshall, Windmöller, Cláudia Carvalhinho

“…In 2002, metallic Hg was found buried in a rural area of Descoberto city, Brazil. The origin of the Hg was a gold mining explotation plant established nearly…”
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Manganese Oxide Biominerals from Freshwater Environments in Quadrilatero Ferrifero, Minas Gerais, Brazil by Keim, Carolina N., Nalini, Hermínio A., de Lena, Jorge Carvalho

“…Biogeochemical Mn cycling in aquatic environments is driven mostly by microbes, and includes reductive dissolution in anaerobic sediments as well as oxidation…”
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Raman spectroscopic study of the mineral qingheiite Na2(Mn2+,Mg,Fe2+)2(Al,Fe3+)(PO4)3, a pegmatite phosphate mineral from Santa Ana pegmatite, Argentina by Frost, Ray L., Xi, Yunfei, Scholz, Ricardo, López, Andrés, Moreira, Caio, de Lena, Jorge Carvalho

“…[Display omitted] •We have studied the pegmatite phosphate mineral qingheiite.•The formula was determined as…”
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Evaluation of risk to human health by natural arsenic contamination in groundwater and soils from the urban area of Ouro Preto (MG) by José Augusto Costa Gonçalves, Jorge Carvalho de Lena

“…This study was performed so as to make an assessment of human exposure to natural contamination by arsenic (As) ingroundwaters and soils in the urban area of…”
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Anthropogenic influence on the degradation of an urban lake – The Pampulha reservoir in Belo Horizonte, Minas Gerais, Brazil by Friese, Kurt, Schmidt, Gerald, de Lena, Jorge Carvalho, Arias Nalini, Herminio, Zachmann, Dieter W.

“…The artificial reservoir Lagoa da Pampulha in central Brazil has been increasingly affected by sediment deposition and pollution from urban and industrial…”
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Avaliação em laboratório do uso de sistemas de coberturas alcalinas para prevenção da drenagem ácida de mina by Abreu, Adriana Trópia de, Faria, Efigênia Miranda de, Guimarães, Juliana Alves Costa, Leite, Adilson do Lago, Lena, Jorge Carvalho de

“…A drenagem ácida de mina (DAM) é um problema ambiental em escala mundial. Ela é proveniente do processo de oxidação química de materiais da mineração que…”
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Sediment contamination in floodplains and alluvial terraces as an historical record of gold exploitation in the Carmo River basin, Southeast Quadrilátero Ferrífero, Minas Gerais, Brazil by Terezinha Costa, Adivane, Arias Nalini Jr, Hermínio, de Tarso Amorim Castro, Paulo, Carvalho de Lena, Jorge, Morgenstern, Peter, Friese, Kurt

“…This paper describes the geochemistry of sediment samples placed in floodplains and alluvial terraces downstream from gold mines in the Carmo River basin,…”
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Avaliação de risco à saúde humana por contaminação natural de arsênio nas águas subterrâneas e nos solos da área urbana de Ouro Preto (MG) by José Augusto Costa Gonçalves, Jorge Carvalho de Lena

“…Na avaliação da exposição humana à contaminação natural por arsênio (As) das águas subterrâneas e solos na área urbana da cidade de Ouro Preto, MG), nos…”
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Distribuição, fracionamento e mobilidade de elementos traço em sedimentos superficiais Distribution, fractional and mobility of trace elements in stream sediments by Janice Cardoso Pereira, Aline Kelly Guimarães-Silva, Hermínio Arias Nalini Júnior, Érica Pacheco-Silva, Jorge Carvalho de Lena

“…The gold and iron mining activities in the Velhas River yield considerable amounts of suspended solids as well as metals to the hydrological system of the…”
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Distribuição, fracionamento e mobilidade de elementos traço em sedimentos superficiais by Pereira, Janice Cardoso, Guimarães-Silva, Aline Kelly, Nalini Júnior, Hermínio Arias, Pacheco-Silva, Érica, Lena, Jorge Carvalho de

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Potencial poluidor de resíduo sólido da Samarco Mineração: estudo de caso da barragem de Germano by Pires, José Maurício Machado, Lena, Jorge Carvalho de, Machado, Carlos Cardoso, Pereira, Reginaldo Sérgio

“…Foram estudadas amostras de resíduo sólido da Barragem de Germano, da Samarco Mineração S.A. Tal barragem localiza-se no município de Mariana-MG. Sua principal…”
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Potencial poluidor de resíduo sólido da Samarco Mineração: estudo de caso da barragem de Germano Polluting potential of Samarco Mineração S.A. solid waste: a Germano dam case study by José Maurício Machado Pires, Jorge Carvalho de Lena, Carlos Cardoso Machado, Reginaldo Sérgio Pereira

“…Foram estudadas amostras de resíduo sólido da Barragem de Germano, da Samarco Mineração S.A. Tal barragem localiza-se no município de Mariana-MG. Sua principal…”
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Raman spectroscopic study of the mineral qingheiite Na2(Mn2+,Mg,Fe2+)2(Al,Fe3+)(PO4)3, a pegmatite phosphate mineral from Santa Ana pegmatite, Argentina by Frost, Ray L, Xi, Yunfei, Scholz, Ricardo, López, Andrés, Moreira, Caio, de Lena, Jorge Carvalho

“…The pegmatite mineral qingheiite Na2(Mn(2+),Mg,Fe(2+))2(Al,Fe(3+))(PO4)3 has been studied by a combination of SEM and EMP, Raman and infrared spectroscopy. The…”
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Synthesis and Study of bis(η5-Cyclopentadienyl) (Ene-1,2-Dithiolato)titanium(IV) Complexes. A Contribution to the Investigation of Metal-Sulphur Bond by De Lena, Jorge Carvalho

“…The preparation of a series of substituted 2,3-quinoxaline-dithiol derivatives is described. These compounds and other ene-1,2-dithiols were used in the…”
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