IARA MARIA CARNEIRO DE CAMARGO BIGNARDI
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Artigo IPEN-doc 26462 Long-term leaching of As, Cd, Mo, Pb, and Zn from coal fly ash in column test2019 - LANGE, C.N.; FLUES, M.; HIROMOTO, G.; BOSCOV, M.E.G.; CAMARGO, I.M.C.Globally, millions of tons of coal fly ash (CFA) are generated per year, and the majority of this material is usually stored in stock piles or landfills, and in a long-term, it can be an environmental hazard if rainwater infiltrates the ashes. Long-term leaching studies of Brazilian ashes are scarce. The purpose of this study was to evaluate arsenic, cadmium, molybdenum, lead, and zinc leaching behavior from a Brazilian CFA by a column experiment designed to simulate field conditions: slightly acid rain considering seasonality of precipitation and temperature for a long-term leaching period (336 days). All elements were leached from CFA, except lead. Elements leaching behavior was influenced by leaching time, leaching volume, and temperature. Higher leachability of As and Cd from CFA during warm and wet season was observed. Results indicate a potential risk to soil and groundwater, since ashes are usually stored in uncovered fields on power plants vicinity.Resumo IPEN-doc 08381 Avaliacao da contaminacao biodisponivel de metais no solo sob influencia da atividade de uma termoeletrica a carvao2001 - CAMARGO, I.M.C.; HAMA, P.; COTRIM, M.E.B.; FIGUEIREDO FILHO, P.M.; FLUES, M.S.M.Artigo IPEN-doc 10598 Radionuclides concentration in coal used in brazilian power plants2005 - FLUES, M.; CAMARGO, I.M.C.; FIGUEIREDO FILHO, P.M.; SILVA, P.S.C.; MAZZILLI, B.P.Artigo IPEN-doc 11735 Radioactivity of coal and ashes from Figueira coal power plant in Brazil2006 - FLUES, M.; CAMARGO, IARA M.C.; SILVA, P.S.C.; MAZZILLI, B.P.Artigo IPEN-doc 11758 Comportamento de zinco e maganes de pilhas alcalinas em uma coluna de solo2006 - AGOURAKIS, DEMETRIOS C.; CAMARGO, IARA M.C. de; COTRIM, MARYCEL B.; FLUES, MARLENEArtigo IPEN-doc 11903 Evaluation of radionuclides concentration in Brazilian coals2007 - FLUES, M.; CAMARGO, I.M.C.; FIGUEIREDO FILHO, P.M.; SILVA, P.S.C.; MAZZILLI, B.P.Artigo IPEN-doc 12294 Heavy metal partition in acid soils contaminated by coal power plant2007 - CAMARGO, I.M.C.; HIROMOTO, G.; FLUES, M.Artigo IPEN-doc 13915 Avaliacao da influencia da operacao da termoeletrica a carvao na concentracao dos metais e As no solo de Figueira, PR - Brasil2008 - FLUES, MARLENE; SATO, IVONE M.; COTRIM, MARYCEL B.; FIGUEIREDO FILHO, PAULO M.; CAMARGO, IARA M.C.Artigo IPEN-doc 19658 Toxic elements mobility in coal and ashes of Figueira coal power plant, Brazil2013 - FLUES, M.; SATO, I.M.; SCAPIN, M.A.; COTRIM, M.E.B.; CAMARGO, I.M.C.During operation, the coal power plant produces solid waste (bottom and fly ash) and uncontrolled ashes disposal could lead to environmental contamination. Major and trace elements (Al, Fe, Ti, Ca, Mg, As, Cd, Cr, Co, Cu, Mn, Mo, Ni, Pb, Zn, V) were determined in coal and ashes of the power plant of Figueira (Brazil) and their mobility evaluated by total and available metal concentration ratio. The total concentration was determined by WDXRF technique and the available concentration (after extraction with EDTA) by ICPOES technique. The results showed a high total concentration for As and Zn (average 270 and 391 mg kg1 ) in coal and (average 974 and 1330 mg kg1 ) in fly ashes. The high mobility of As (>70%), followed by Mo (>55%) and next by Mn, Zn, Cd, Pb (30–5%) in ash can cause environmental impact. Arsenic could be considered the most critical element to be leached from ashes.