Contamination By Pb
Mostrando 1-12 de 95 artigos, teses e dissertações.
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1. Contamination of groundwater by necro-leachate and the influence of the intervening factors in cemeteries of the municipality of Lages – Brazil
RESUMO Os cemitérios são fontes potenciais de contaminação das águas subterrâneas e, apesar dos diversos estudos que evidenciam essa contaminação, poucos são os estudos que consideram como os aspectos e características da zona não saturada intervêm nesse processo. Este estudo avaliou a qualidade das águas subterrâneas nas áreas de dois cemité
Engenharia Sanitaria e Ambiental. Publicado em: 2022
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2. Dietary risk assessment of fluoride, lead, chromium, and cadmium through consumption of Tieguanyin tea and white tea
Abstract Food and beverage consumption is the most possible route of human exposure to undesirable elements. Tieguanyin tea and white tea are widely-consumed beverage, which may be contaminated by fluoride (F), lead (Pb), chromium (Cr), and cadmium (Cd). For this study, the contamination levels and dietary exposure risks of these elements were studied from 7
Food Sci. Technol. Publicado em: 2021-09
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3. Evaluation and Geostatistical Study of Toxicological Risk by Water Ingestion with Al, Ba, Fe and Pb in Communities Close to Industrial Areas in the Brazilian Amazon
This study provides a risk assessment and risk maps related to the consumption of water contaminated by Al, Ba, Fe and Pb in an industrial area in the Brazilian Amazon. A total of 120 samples of drinking water were collected from 26 locations in the municipality of Barcarena, Pará State. Multiple elements were analyzed by inductively coupled plasma optical
J. Braz. Chem. Soc.. Publicado em: 2020-07
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4. Estimativa de contaminação de águas subterrâneas e superficiais por agrotóxicos em área sucroalcooleira, Santa Rita/PB, Brasil
Resumo O aumento da produtividade agrícola, em especial da produção canavieira, geralmente está associado ao uso de agrotóxicos. O risco de contaminação desses compostos nos recursos hídricos é uma preocupação para a saúde pública e ambiental. Nesse contexto, o estudo objetivou estimar o potencial de contaminação das águas subterrâneas e sup
Ciênc. saúde coletiva. Publicado em: 25/11/2019
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5. Heavy metals in the São Mateus Stream Basin, Peixe River Basin, Paraiba do Sul River Basin, Brazil
Resumo Empreendimentos com porte e potencial poluidor precisam ser licenciados adequadamente, fiscalizados e monitorados durante e após suas operações de forma a evitar e/ou mitigar impactos nas suas áreas de influência. A Bacia Hidrográfica do córrego São Mateus (BHCSM), situada em zona rural de Juiz de Fora (MG), é impactada por várias atividades
Rev. Ambient. Água. Publicado em: 03/06/2019
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6. Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region
ABSTRACT In the Brazilian Cerrado biome, there are wetlands locally known as “Veredas”, which are swampy plains between hills and rivers. Since the 1970’s, the Cerrado biome has been gradually converted to livestock, crop, or forestry production. Until now, very few studies were conducted to evaluate the baseline contents of trace elements in Cerrado w
Rev. Bras. Ciênc. Solo. Publicado em: 29/04/2019
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7. Heavy metal concentrations and ecological risk assessment of the suspended sediments of a multi-contaminated Brazilian watershed
ABSTRACT. Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, N
Acta Sci., Agron.. Publicado em: 28/03/2019
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8. Trace Element Analysis, Model-Based Clustering and Flushing to Prevent Drinking Water Contamination in Public Schools
Drinking water samples taken from cafeteria sinks and water fountains in each of the 76 schools in the Winston-Salem/Forsyth County Schools (WSFCS) district (North Carolina, United States) were analyzed by inductively coupled plasma tandem mass spectrometry (ICP-MS/MS) to determine As, Cd, Cr, Cu, Pb, Sb, Se and Tl. All samples from currently active schools
J. Braz. Chem. Soc.. Publicado em: 2019-03
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9. High Uranium Concentrations in the Groundwater of the Rio de Janeiro State, Brazil, Mountainous Region
Unexpectedly high uranium concentrations, up to 930 µg L-1, approximately thirty times higher than the World Health Organization (WHO) guidance level, were observed in groundwater samples from the mountainous region near Rio de Janeiro City, the so-called “Região Serrana”, approximately 60 km from the city. This region is characterized by a large numbe
J. Braz. Chem. Soc.. Publicado em: 2019-02
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10. Cretaceous carbonatites of the southeastern Brazilian Platform: a review
ABSTRACT: This paper reviews general aspects of alkaline-carbonatitic rocks of Brazilian, Paraguayan and Bolivian terrains. Although 30 such occurrences are known in literature, only the major ones have been thoroughly investigated. The carbonatites are of Cretaceous age, with two well-defined Lower Cretaceous and Upper Cretaceous generation episodes. A clea
Braz. J. Geol.. Publicado em: 2018-06
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11. Alkaline Solubilization of Chicken Tissues Monitored by Raman Spectroscopy Followed by Pb Determination by GF AAS
This paper proposes a method for chicken tissues preparation using tetramethylammonium hydroxide (TMAH) for Pb determination by graphite furnace atomic absorption spectrometry employing multivariate approaches. Combining Raman spectroscopy with scanning electron microscopy coupled to energy-dispersive X-ray spectroscopy to monitor the solubilization process
J. Braz. Chem. Soc.. Publicado em: 2018-02
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12. GEOCHEMICAL BACKGROUND IN AN OXISOL
ABSTRACT Geochemical background establishment is indispensable to determine the actual state of contamination of soils and sediments. However, no scientific consensus exists regarding the methodology for determining these values. In this context, this study aimed to establish the geochemical background in an Oxisol (Rhodic Hapludox) by means of an integrated
Eng. Agríc.. Publicado em: 2017-06