CAMILA NEVES LANGE
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Artigo IPEN-doc 24747 Potentially toxic elements downward mobility in an impounded vehicle scrapyard2018 - LANGE, CAMILA N.; FIGUEIREDO, ANA M.G.; ENZWEILER, JACINTA; MONTEIRO, LUCILENA R.In Brazil impounded vehicle scrapyards (IVS) are often overcrowded and may pose a source of potentially toxic elements (PTEs). In this study, PTEs content in soil cores and groundwater of an IVS located at a municipality of the So Paulo metropolitan region was assessed. INAA, XRF and ICP-MS were the analytical techniques employed. PTEs results and statistical approaches indicated that As, Pb, Ni, Cu and Nb are mostly anthropic. Pb, Cu, Ni and Nb mass fraction increased with depth indicating some downward mobility. Arsenic may represent a moderate to very high potential ecological risk. PTEs groundwater levels were bellow drinking water recommendation limits.Resumo IPEN-doc 24536 Potentially toxic elements downward mobility in an impounded vehicle scrapyard2017 - LANGE, C.N.; FIGUEIREDO, A.M.G.; ENZWEILER, J.; MONTEIRO, L.R.Pollution from vehicle in parking areas has become a challenge mainly in urban centers. In Brazil impounded vehicle scrapyards (IVS) are often overcrowded and may pose a source of potentially toxic elements (PTEs). Recently Lange et al. (2016) have evaluated PTEs mass fraction on topsoil (0.2m) in an IVS at Ribeirao Pires city (23 42’8" S 46 25’34" W) which lies 29km southwest of São Paulo city, in southwest of Brazil. The authors observed hot spots for most elements suggesting vehicular source. This IVS terrain was filled with soil mixed with demolition waste, such as brick, tiles, steel, wood, plastic, glass, asphalt fragments, rubbers and also auto parts pieces. Since 90’s, this IVS is operational and, before the filling, no evaluation on PTEs soil distribution by depth was performed. Therefore, many doubts concerning PTEs downward mobiliy lay in this site. The aim of this study is to evaluate if PTEs indeed moved through the soil depth and if so what are PTE’s concentration in groundwater, since this site has a permeable surface and vehicles are parked directly on topsoil. Three monitoring wells were installed. Nine samples were collected in plastic liners: four in PM1, three in PM2 and two in PM3. Groundwater was sampled using a low flow peristaltic pump and pH, electrical conductivity, redox potential and temperature were measured with a multiparameter probe. Neutron activation analysis was employed to determine PTEs in soil samples, and ICP-MS was the analytical technique for groundwater analysis. The obtained values were compared with literature data from Brazil and other regions around the world, as so with recommended values from environmental regulatory agencies. Although the obtained results have indicated some PTEs enrichment in the distinct soil layers, these elements did not reach groundwater, according to present evaluation.Artigo IPEN-doc 24116 Determinação de impurezas inorgânicas em henna para sobrancelhas para aplicação cosmética2017 - MARINHEIRO, THAMIRES S.; LANGE, CAMILA N.; FIGUEIREDO, ANA M.G.; TICIANELLI, REGINA B.; JESUS, TATIANE A. deAlguns cosméticos podem conter impurezas inorgânicas que, dependendo do nível de fração em massa das mesmas na composição do produto, podem causar efeitos nocivos à saúde humana. A henna (Lawsonia inermis) é uma planta, e o pó, obtido de suas folhas secas e maceradas, é comercializado para coloração de cabelos e sobrancelhas. É comum o uso de henna como alternativa às colorações sintéticas, especialmente para os consumidores que preferem produtos cosméticos naturais ou orgânicos, pois estes são tidos como seguros. Entretanto, algumas hennas comerciais são dopadas com materiais que intensificam a cor e diminuem o tempo de aplicação do produto, estes podem ser de origem mineral ou sais iônicos. Estudos do conteúdo de elementos inorgânicos em hennas comercializadas no Brasil são escassos, apesar de o Brasil ser um dos maiores mercados consumidores de cosméticos do mundo e a aplicação de hennas em sobrancelhas ter aumentado nos últimos anos. O objetivo deste estudo foi avaliar a fração em massa de Ba, Cd, Co, Cr, Fe, Ni e Zn em hennas para coloração de sobrancelhas. Hennas de diferentes cores e marcas comercializadas no mercado e aplicadas em salões de cabelereiro foram analisadas. Quatro das 11 amostras analisadas apresentaram valores de fração em massa de bário cerca de 250 vezes maior que o valor preconizado pela agência nacional de vigilância sanitária (ANVISA), fato que pode representar um potencial risco aos usuários deste tipo de produto. As frações em massa de Cd, Co, Cr, Fe, Ni e Zn apresentaram valores abaixo dos limites regulamentados para cosméticos.Artigo IPEN-doc 24077 Chemical characterization of urban park soils of the metropolitan region of São Paulo2017 - FIGUEIREDO, ANA M.G.; ENZWEILER, JACINTA; LANGE, CAMILA N.; SIGOLO, JOEL B.Resumo IPEN-doc 22877 Soil trace element status in an impouded vehicle scrapyard2016 - LANGE, CAMILA N.; FIGUEIREDO, ANA M.G.; ENZWEILER, JACINTAThe number of motor vehicles has increased by 118% over the past decade in Brazil, which is transforming urban space regarding mobility, parking and disposal capacity of these vehicles. Impounded vehicle scrapyard overcrowding has become a challenge in many Brazilian regions. This now is considered a potential risk to soil quality, since vehicles are usually parked directly on the topsoil. The aim of this study was to evaluate topsoil samples from a scrapyard of impounded vehicles for Potentially Toxic Elements (PTEs), like As, Co, Cr, Cu, Mo, Ni, Pb, and Zn, and rare-earths. The area of study is in Ribeirão Pires, São Paulo, Brazil. For this purpose, forty samples were analysed by Instrumental Neutron Activation Analysis (INAA) and X-Ray Fluorescence Spectrometry (XRF). The obtained values were compared with literature data from Brazil and other regions around the world, as so with recommended values from environmental regulatory agencies. Some soil-geochemical variables [including pH, organic matter (OM), cation exchange capacity (CEC)], and texture (e.g. clay, silt and sand content) were used to interpret the behaviour of the studied elements in the soil. The PTEs contents ranged as follows: As (<3–15 mg kg–1), Co (2–30 mg kg–1), Cr (7–183 mg kg–1), Cu (3–73 mg kg–1), Mo (<1–6 mg kg–1), Ni (<3–38 mg kg–1), Pb (23–211 mg kg–1) and Zn (18–352 mg kg–1). In some hotspots, PTEs content exceeded continental crust and also international recommended values. The normalization of the rare-earth data by the Post-Archean Average Australian Shale (PAAS) indicated high anomalous values of Ce in some points that may suggest an anthropogenic source, such as vehicle exhaust catalysts (VEC). Total contents of PTEs rank in the following order: Cr>Zn>Pb>Cu>Ni>As>Co>Mo. This is the first study in scrapyards of impounded vehicles in Brazil. The results may be used to monitor soil contamination in these sites and for more effective environmental management.Resumo IPEN-doc 23689 Rare earth elements in soil profile and groundwater of a vehicle impound scrapyard2016 - LANGE, CAMILA N.; FIGUEIREDO, ANA M.G.; ENZWEILER, JACINTAThe number of motor vehicles has increased drastically over the past decade in Brazil. As such, vehicle impound scrapyard (SIV) overcrowding has become a challenge in many Brazilian regions, and environmental problems associated with this activity are becoming more acute. Contamination by metals such as Pb, Fe, Cd and Ni under and in the vicinity of soils of discarded vehicle scrapyards have been reported in several studies,1 but information about rare earth elements in this environment is scarce. Currently, one of the main end uses for rare earth elements (REEs) are for automobile catalysts and petroleum refining, as well as the use in fuel and oil additives, and more recently, also in electronic devices. The aim of this study was to evaluate the content of REEs in soil profiles and groundwater in the area of a SIV located in the city of Ribeirão Pires, a municipality in the metropolitan region of São Paulo state, Brazil. Three monitoring wells were installed, one upstream (PM1), without influence of the vehicles, and two downstream (PM2 and PM3). Sampling was performed with a mechanical probe and the wells were lined by a 2” diameter geomechanical PVC tube and filter. Nine samples were collected in plastic liners: four in PM1 (0-0.75 m; 0.75-1.30 m; 1.30-2.10 m; 2.10-2.70 m) three in PM2 (0-0.50 m; 0.50-0.85 m; 0.85-1.45 m) and two in PM3 (0-1.0 m; 1.0-1.75 m). Groundwater was sampled (one sample in PM1, two in PM2 and one in PM3) using a low flow peristaltic pump and pH, electrical conductivity, redox potential and temperature were measured with a a multiparameter probe. Water samples were filtered with using 60 mL plastic syringes coupled with 0.45 μm pore size PVDF filters. Soil samples were dried at 40 ºC and sieved (< 2 mm). Before and after sieving samples were disaggregated, homogenized, quartered. Samples were ground using agate jars and balls and a planetary mill. Neutron activation analysis was employed to determine REEs in soil samples, and ICP-MS was the analytical technique for groundwater analysis. The REEs mass fractions in the soil profiles varied between 0.083 and 137.9 μg/g in PM1, with significantly higher values in the first layer (0-0.75 m), between 0.52 and 99.1 μg/g in PM2 and between 0.33 and 121.9 μg/g in PM3. The groundwater showed the highest REEs concentrations in PM2 (0.02 to 3.29 ng/mL), followed by PM1 (0.005 to 0.33 ng/mL) and PM3 (0.002-0.14 ng/mL). Such values are in the range of expected REEs values in groundwater, considering physicochemical and sampling conditions. The chondrite normalized REEs patterns of the soil samples show enrichment of light REEs over heavy REEs, with a small positive anomaly of Ce in PM3. According to DERSA,2 the main lithotypes of the area comprise granites and metamorphic rocks. Wedepohl3 quotes average Ce values in granitic rocks as 104 μg/g, which is in accordance with the results of this study. Overall, the findings indicate that the values of REEs in the study area are, up to now, mostly geogenicArtigo IPEN-doc 22834 Trace elements status in the terrain of an impounded vehicle scrapyard2017 - LANGE, CAMILA N.; FIGUEIREDO, ANA M.G.; ENZWEILER, JACINTA; CASTRO, LILIANAThe impact of a scrapyard of impounded vehicles in Sa˜o Paulo state on topsoil was evaluated for As, Ba, Co, Cr, Cu, Mo, Ni, Pb, V, Zn and rare earth elements (REEs). Mass fractions of all elements, except for Co, Cu, Mo and Zn, were higher than reference values. Hot spots were observed for most elements suggesting vehicular source. The geoaccumulation index showed moderate pollution of As. The enrichment factor pointed to a significant enrichment of As, Mo and Pb. The normalization of REEs to Earth’s crust values indicated a positive anomaly of Ce. The results indicate a potential risk to the soil quality of the scrapyard.Artigo IPEN-doc 22766 A Brazilian coal fly ash as a potential source of rare earth elements2017 - LANGE, CAMILA N.; CAMARGO, IARA M.C.; FIGUEIREDO, ANA MARIA G.M.; CASTRO, LILIANA; VASCONCELLOS, MARINA B.A.; TICIANELLI, REGINA B.Rare earth elements (REEs) have several applications and their market demands have increased. Recently, coal fly ash (CFA) has been considered as a source of these elements. The purpose of this study was to evaluate the REEs content in a CFA from a Brazilian coal power plant by instrumental neutron analysis, to classify it according to commercial purposes and to assess the weathering impact in the REEs content, since it is held in fields nearby the power plant. The results pointed no significant REEs leachability and indicated this CFA as a promising REEs source.Resumo IPEN-doc 22493 Rare earth elements content and leachability in coal fly ash from figueira coal power plant2016 - LANGE, CAMILA N.; VASCONCELLOS, MARINA B.A.; FIGUEIREDO, ANA M.G.; CAMARGO, IARA M.C. de; CASTRO, LILIANA; TICIANELLI, REGINA B.Artigo IPEN-doc 21161 Uncertainty analysis in comparative NAA applied to geological and biological matrices2015 - ZAHN, GUILHERME S.; TICIANELLI, REGINA B.; LANGE, CAMILA N.; FAVARO, DEBORAH I.T.; FIGUEIREDO, ANA M.G.