Proposição de valores de referência para a concentração natural de metais pesados em solos brasileiros

Fadigas, Francisco de Souza; Sobrinho, Nelson Moura Brasil do Amaral; Mazur, Nelson; Anjos, Lúcia Helena Cunha dos; Freixo, Alessandra Alexandre

doi:10.1590/s1415-43662006000300024

Cited by 59 publications

(36 citation statements)

References 14 publications

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“…The RRV were close to the background presented by Fadigas et al (2006). Also, the Latosol samples were undisturbed or nearly undisturbed by human activity.…”

Section: Rrv and Brazilian Backgroundssupporting

confidence: 73%

“…The background values and tolerance limits established for the elements Cd, Co, Cr, Cu, Ni, Pb, and Zn, were determined predominantly in samples of distroferric Red Latosol, distroferric Red Nitosol, Brown Latosol and eutroferric Red Argisol (Table 5), herein denominated group G1 (Fadigas et al, 2006). These studies demonstrated that the main physical, chemical and mineralogical characteristics of soils can influence the background values, including clay, Mn, Fe contents and cation exchange capacity (CEC).…”

Section: Rrv and Brazilian Backgroundsmentioning

confidence: 99%

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Use of legal reserve areas as geochemical background in hydrosedimentology studies¹

Juchen

Boas

Poleto

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYIn hydrosedimentology studies the determination of the trace element concentrations at the study site is imperative, since this background can be used to assess the enrichment of sediments with these elements. This enrichment can be the result of the natural process of geological formation or of anthropogenic activities. In the latter case, guidelines are used to indicate the concentrations at which trace elements cause ecotoxicity effects on the environment. Thus, this study used legal reserve areas in the municipality of Toledo, PR, where natural forests are maintained, with no or minimal human interference to establish background levels. The results of atomic emission spectrometry with inductively coupled argon plasma showed that the legal reserves have lower levels of trace elements than other theoretical references, but equivalent concentrations to the safety levels recommended by international guidelines. It was concluded that determining values is fundamental to recommend this background as scientific database for research in the area of hydrosedimentology of this site and also as a way of environmental management of the watershed of this municipality.Index terms: natural heavy metal levels, conservation areas, environmental quality.( RESUMO: UTILIZAÇÃO DE ÁREAS DE RESERVA LEGAL COMO BACKGROUND GEOQUÍMICO EM ESTUDOS HIDROSSEDIMENTOLÓGICOSEm estudos de hidrossedimentologia é imprescindível que se tenha o levantamento dos teores de elementos-traço do local de pesquisa, uma vez que esse background pode ser utilizado para interpretações do enriquecimento desses elementos no local da pesquisa. Esse enriquecimento pode estar relacionado ao processo natural de sua formação geológica ou às ações antropogênicas, sendo nesse último caso utilizado os guidelines, que apresentam as concentrações em que os elementos-traço causam efeitos de ecotoxicidade no ambiente. Assim, este estudo utilizou áreas com florestas naturais denominadas de reserva legal para formação do background do município de Toledo, PR, as quais asseguram condições de nenhuma ou mínima interferência antrópica. Os resultados da espectrometria de emissão atômica com plasma de argônio acoplado indutivamente demonstraram que as reservas legais possuem teores de elementos-traço inferiores aos demais referenciais teóricos pesquisados, porém em concentrações equivalentes aos níveis de segurança dos recomendados pelos guidelines internacionais consultados. Concluiu-se que os valores determinados são fundamentais para recomendar esse background como base de dados científicos para pesquisas da área de hidrossedimentologia desse local e também como forma de gerenciamento ambiental da bacia hidrográfica desse município.Termos de indexação: teores naturais de metal pesado, áreas de preservação, qualidade ambiental.

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“…The RRV were close to the background presented by Fadigas et al (2006). Also, the Latosol samples were undisturbed or nearly undisturbed by human activity.…”

Section: Rrv and Brazilian Backgroundssupporting

confidence: 73%

Section: Rrv and Brazilian Backgroundsmentioning

confidence: 99%

Use of legal reserve areas as geochemical background in hydrosedimentology studies¹

Juchen

Boas

Poleto

et al. 2014

Rev. Bras. Ciênc. Solo

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“…However, some heavy metals, like Pb, Hg, As, and Cd, do not have any biological activity and, even at low concentrations, may have a harmful effect on plants (Lasat, 2002). Soils in their natural state have heavy metals at varied concentrations, depending on the material of origin and the processes involved in their formation (Fadigas et al, 2006). There may also be deposition in the soil through industry or use of agricultural inputs such as fertilizers and pesticides (Xue et al, 2003), or diffuse contamination through deposit of aerosols on the soil surface.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metals and Micronutrients in the Soil and Grapevine Under Different Irrigation Strategies

Oliveira

Lima

Salviano

et al. 2015

Rev. Bras. Ciênc. Solo

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Soils under natural conditions have heavy metals in variable concentrations and there may be an increase in these elements as a result of the agricultural practices adopted. Transport of heavy metals in soil mainly occurs in forms dissolved in the soil solution or associated with solid particles, water being their main means of transport. In this context, the aim of this study was to evaluate the heavy metal and micronutrient content in the soil and in the grapevine plant and fruit under different irrigation strategies. The experiment was carried out in Petrolina, PE, Brazil. The treatments consisted of three irrigation strategies: full irrigation (FI), regulated deficit irrigation (RDI), and deficit irrigation (DI). During the period of grape maturation, soil samples were collected at the depths of 0-10, 10-20, 20-40, 40-60, and 60-80 cm. In addition, leaves were collected at the time of ripening of the bunches, and berries were collected at harvest. Thus, the heavy metal and micronutrient contents were determined in the soil, leaves, and berries. The heavy metal and micronutrient contents in the soil showed a stochastic pattern in relation to the different irrigation strategies. The different irrigation strategies did not affect the heavy metal and micronutrient contents in the vine leaves, and they were below the contents considered toxic to the plant. In contrast, the greater availability of water in the FI treatment favored a greater Cu content in the grape, which may be a risk to vines, causing instability and turbidity. Thus, adoption of deficit irrigation is recommended so as to avoid compromising the stability of tropical wines of the Brazilian Northeast.

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“…Nos estudos de Santos-Filho & Rocha (1982) apud Fadigas et al (2002), esses solos apresentam altas concentrações de óxidos de Fe, Mn (manganês) e o Cu. Fadigas et al (2006) propõe valores de referência para a concentração natural de metais em solos brasileiros para serem defrontados com os solos poluídos. Além disso, a existência de um incinerador no Câmpus da UNESP, próximo do ponto P 1 , pode contaminar e liberar material particulado com metais que se deposita rapidamente na superfície do solo e atingir o leito do córrego no período de chuva.…”

Section: Resultsunclassified

Investigação Da Poluição Por Metais Tóxicos No Córrego Do Cintra

Belluta

Coelho²,

Silva

et al. 2014

R_I

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RESUMOO córrego do Cintra é o principal receptor do efluente tratado do esgoto sanitário, hospitalar e laboratórios de pesquisa oriundos do Câmpus da UNESP de Botucatu SP, Rubião Júnior, e apresenta indícios de contaminação difusa por metais ao longo do seu percurso. As análises de metais mais tóxicos (Pb, Cu, Fe, Ni e Zn) foram analisados pelo espectrômetro de absorção atômica AA-6.800 -Perkin Elmer, analyst 700 e o estudo estatístico dos resultados foram analisados por ANOVA, seguida por teste de Tukey, no nível de 5% de significância. Este trabalho teve como objetivo principal comparar dados atuais de metais com os dados de outros estudos na mesma área e de mesma natureza realizados antes e após à implementação da gestão de resíduos químicos pela universidade no ano de 2008, além de identificar e quantificar possível contaminação difusa e pontual. Os pontos P 1 e P 2 indicaram contaminação pontual e entre os pontos P 4 e P 7 , foram observados fontes difusa. A qualidade da água do córrego do Cintra melhorou após a implantação do programa de gestão de resíduos químicos de laboratório no Câmpus da UNESP. Palavras-chave ABSTRACTCintra stream is the major receiver of treated effluent from sanitary, hospital and research laboratory sewage from the UNESP campus in Botucatu, Rubião Júnior District, São Paulo state; and it has shown evidence of diffuse contamination by metals along it. Analyses of the most toxic metals (Pb, Cu, Fe, Ni and Zn) were carried out by using an atomic absorption

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Proposição de valores de referência para a concentração natural de metais pesados em solos brasileiros

Cited by 59 publications

References 14 publications

Use of legal reserve areas as geochemical background in hydrosedimentology studies¹

Use of legal reserve areas as geochemical background in hydrosedimentology studies¹

Heavy Metals and Micronutrients in the Soil and Grapevine Under Different Irrigation Strategies

Investigação Da Poluição Por Metais Tóxicos No Córrego Do Cintra

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