Valores de referência local e avaliação da contaminação por zinco em solos adjacentes a áreas mineradas no município de Vazante-MG

Júnior, Meubles Borges; Mello, Jaime Wilson Vargas de; Schaefer, Carlos Ernesto Gonçalves Reynaud; Dussin, Tânia Mara; Abrahão, Walter Antônio Pereira

doi:10.1590/s0100-06832008000700036

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Rafael da Rosa Couto,* Matheus dos Santos, Jucinei José Comin, Luíz Carlos Pittol Martini, Luciano Colpo Gatiboni, Sérgio Roberto Martins, Paulo Belli Filho, and Gustavo Brunetto C ontamination is characterized by the presence of chemical elements in the soil at higher concentrations than those considered normal (Borges et al, 2008;Antibachi et al, 2012). The contaminants may accumulate in the soil profile and become pollutants, affecting soil function, and might migrate into subsurface and surface waters, affecting the supply of drinkable water and the aquatic ecosystem Rubaek et al, 2013;Schoumans et al, 2014).…”

Section: Environmental Vulnerability and Phosphorus Fractions Of Areamentioning

confidence: 99%

Environmental Vulnerability and Phosphorus Fractions of Areas with Pig Slurry Applied to the Soil

et al. 2015

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The application of pig slurry as a fertilizer can cause soil and water contamination. Intrinsic characteristics of the environment may enhance this effect and influence the vulnerability of the agricultural system. The goal of this study was to evaluate the accumulation of soil P fractions in areas treated with pig slurry and in forest areas and to propose an evaluation of the areas' vulnerability to P contamination. Soil samples were collected from 10 areas with pig slurry applied to the soil and one in forest without a history of pig slurry application, all located in the Coruja and Bonito rivers microbasin at Braço do Norte, Santa Catarina, southern Brazil. Samples were prepared and subjected to P chemical fractionation. Two versions of the P index method, based on soil P forms or only on P extracted by Mehlich-1, were used to evaluate the environmental risk of the studied areas. Estimated soil losses were lower for the forest and natural pasture and highest in areas with black oat ( Schreb.)-corn ( L.) crop cultivation. Concentrations of P fractions, especially of organic and inorganic P extracted by 0.1 and 0.5 mol L NaOH and NaHCO and of inorganic P extracted by anion exchange resin and HCl, were higher in areas with a longer history and higher frequency of pig slurry applications. Vulnerability to P contamination was mainly influenced by soil P concentrations and soil losses in the studied areas. The P index based on Hedley's fractionation P forms resulted in a more accurate risk scoring of the studied areas than the P index based on the concentration of available P extracted by Mehlich-1.

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Section: Environmental Vulnerability and Phosphorus Fractions Of Areamentioning

confidence: 99%

Environmental Vulnerability and Phosphorus Fractions of Areas with Pig Slurry Applied to the Soil

et al. 2015

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Cadmium availability and accumulation by lettuce and rice

Pereira

Rozane

Araújo

et al. 2011

Rev. Bras. Ciênc. Solo

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SUMMARYAmong the toxic elements, Cd has received considerable attention in view of its association with a number of human health problems. The objectives of this study were to evaluate the Cd availability and accumulation in soil, transfer rate and toxicity in lettuce and rice plants grown in a Cd-contaminated Typic Hapludox. Two simultaneous greenhouse experiments with lettuce and rice test plants were conducted in a randomized complete block design with four replications. The treatments consisted of four Cd rates (CdCl 2 ), 0.0; 1.3; 3.0 and 6.0 mg kg -1 , based on the guidelines recommended by the Environmental Agency of the State of São Paulo, Brazil (Cetesb). Higher Cd rates increased extractable Cd (using Mehlich-3, Mehlich-1 and DTPA chemical extractants) and decreased lettuce and rice dry matter yields. However, no visual toxicity symptoms were observed in plants. Mehlich-1, Mehlich-3 and DTPA extractants were effective in predicting soil Cd availability as well as the Cd concentration and accumulation in plant parts. Cadmium concentration in rice remained below the threshold for human consumption established by Brazilian legislation. On the other hand, lettuce Cd concentration in edible parts exceeded the acceptable limit.Index terms: Lactuca sativa L., Oryza sativa L., soil pollution, chemical extractants, heavy metals, human health.(1) Received for publication in January 2010 approved in december 2010.

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Valores de referência local e avaliação da contaminação por zinco em solos adjacentes a áreas mineradas no município de Vazante-MG

Abstract: (1) Trabalho apresentado no XXXI Congresso Brasileiro de Ciência do Solo, 2007 (Gramado, RS).(2) Professor do

Cited by 2 publications

References 7 publications

Environmental Vulnerability and Phosphorus Fractions of Areas with Pig Slurry Applied to the Soil

Environmental Vulnerability and Phosphorus Fractions of Areas with Pig Slurry Applied to the Soil

Cadmium availability and accumulation by lettuce and rice

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