Qualidade do substrato minerado de uma área de empréstimo revegetada no distriro federal

Corrêa, Rodrigo Studart; Bento, Marcel Anderson Borges

doi:10.1590/s0100-06832010000400039

Cited by 21 publications

(12 citation statements)

References 16 publications

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“…Out of the total collected, 65% are intended to the town, this resource being applied into projects which revert in behalf o the local community, as improvement the infrastructure of the environmental quality, health and education (DNPM, 2010). Corrêa & Bento (2010) state that the work whose objective is the restoration of mining ecosystems should be developed aiming at strengthening the edaphological systems with techniques which improve the physical quality of the substrates and do not exceed the natural fertility levels. The main impacts generated potentially upon the edaphological system focus on the alteration of the topography and interruption of the nutrient cycling.…”

Section: Análysis Of the Socioenvironmental Impactsmentioning

confidence: 99%

Characterization of the bauxite mining of the Poços de Caldas alkaline massif and its socio-environmental impacts

Barros¹,

Guimarães²,

Pereira³

et al. 2012

Rem: Rev. Esc. Minas

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ResumoO uso intensivo dos recursos minerais traz consigo alterações significativas no meio ambiente. O setor minerário é fundamental para a economia mundial, desde que operado em bases tecnicamente coerentes, socialmente justas e ambientalmente corretas. O presente trabalho teve como objetivo caracterizar a mineração de bauxita no planalto de Poços de Caldas -MG, analisando seus respectivos impactos socioambientais. Por meio do panorama apresentado, concluiu-se que a mineração de bauxita realizada no planalto de Poços de Caldas, na maioria das situações, mitiga seus respectivos impactos socioambientais negativos de forma satisfatória, além de gerar impactos sociais positivos; os métodos de restauração dos ecossistemas perturbados pela mineração vêm sendo aperfeiçoados continuamente e há necessidade que sejam reproduzidos nos empreendimentos de pequeno e médio porte. Palavras-chave:

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Section: Análysis Of the Socioenvironmental Impactsmentioning

confidence: 99%

Characterization of the bauxite mining of the Poços de Caldas alkaline massif and its socio-environmental impacts

Barros¹,

Guimarães²,

Pereira³

et al. 2012

Rem: Rev. Esc. Minas

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“…Assessing soil quality is also challenging because soil quality can vary in accordance with its original composition and it is strongly linked to anthropogenic activities (ARAÚJO; KER; NEVES, 2012). Corrêa and Bento (2010) recommend that scientists study the restoration of mined ecosystems to strengthen knowledge of edaphological systems and to develop effective techniques that can improve the physical quality of substrates.…”

Section: Introductionmentioning

confidence: 99%

Soil physical properties of high mountain fields under bauxite mining

et al. 2013

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Mining contributes to the life quality of contemporary society, but can generate significant impacts, these being mitigated due to environmental controls adopted. This study aimed to characterize soil physical properties in high-altitude areas affected by bauxite mining, and to edaphic factors responses to restoration techniques used to recover mined areas in Poços de Caldas plateau, MG, Brazil. The experiment used 3 randomized block design involving within 2 treatments (before mining intervention and after environmental recovery), and 4 replicates (N=24). In each treatment, soil samples with deformed structures were determined: granulometry, water-dispersible clay content, flocculation index, particle density, stoniness level, water aggregate stability, and organic matter contend. Soil samples with preserved structures were used to determine soil density and the total volume of pores, macropores, and micropores. Homogenization of stoniness between soil layers as a result of soil mobilization was observed after the mined area recovery. Stoniness decreased in 0.10-0.20 m layer after recovery, but was similar in the 0-0.10 m layer in before and after samples. The recovery techniques restored organic matter levels to pre-mining levels. However, changes in soil, including an increase in soil flocculation degree and a decrease in water-dispersible clays, were still apparent post-recovery. Furthermore, mining operations caused structural changes to the superficial layer of soil, as demonstrated by an increase in soil density and a decrease in total porosity and macroporosity. Decreases in the water stability of aggregates were observed after mining operations.Index terms: Environmental recovery, physical soil quality, soil recovery. RESUMOA mineração contribui para a qualidade de vida da sociedade contemporânea, porém pode gerar impactos significativos, sendo esses mitigados em função dos controles ambientais adotados. Neste trabalho objetivou-se caracterizar as propriedades físicas do solo, mediante a influência de empreendimentos minerários, avaliando as respostas dos atributos edáficos frente às técnicas utilizadas para a recuperação de áreas degradadas pela mineração de bauxita na região do planalto de Poços de Caldas, MG. O delineamento experimental foi concebido com 3 blocos casualizados, com 2 tratamentos (antes da intervenção minerária e depois da recuperação ambiental), e 4 repetições (N=24). Em cada situação, por meio das amostras com estruturas deformadas foram determinados: granulometria, argila dispersa em água, índice de floculação, densidade de partículas, índice de pedregosidade, estabilidade de agregados em água e teor total de matéria orgânica, por meio das amostras com estrutura preservada foram determinadas: densidade do solo, volume total de poros, macroporos e microporos. Após a recuperação da área minerada, ocorreu homogeneização da pedregosidade entre as camadas, decorrente do revolvimento e, consequentemente, da sua redução na camada de 0,10 a 0,20 m; os processos de recuperação da áre...

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“…The long-term demanded for the vegetation cover development on the mine located in the Brasília National Park -A 1 (Table 1; Figure 1), where diaspores are abundant, portrays the adverse conditions of the mined surface. Increases in species richness and plant biomass are necessary for the development of an ecosystem (Starr et al, 2013) but a few Cerrado species are able to recruit on exploited mines (Corrêa et al, 2007), where chemical, physical, and biological conditions cannot support live forms (Corrêa & Bento, 2010).…”

Section: Discussionmentioning

confidence: 99%

Vegetation Cover Development Resulting from Different Restoration Approaches of Exploited Mines

et al. 2018

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The vegetation cover development is an essential step towards the restoration of the ecosystems. In this work, we applied remote sensing to evaluate the temporal development of vegetation cover on exploited mines revegetated with five approaches: natural regeneration, tree plantation, cultivation of trees + herbs, topsoil replacement + tree plantation, and sewage sludge incorporation into mining substrate. Results showed that the natural regeneration approach would require a secular time to provide satisfactory vegetation cover on the exploited mine. Tree plantation required fifteen years to provide 80% of vegetation cover. The use of topsoil + trees or the incorporation of sewage sludge into mining substrates achieved the fastest development of vegetation cover (2.5-5 years) and the highest percentages of revegetated surface (80-95%). However, the floristic composition of vegetation covers is as important as their development, and some restoration approaches are reported to stimulate weed invasion while others prevent it.

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Qualidade do substrato minerado de uma área de empréstimo revegetada no distriro federal

Cited by 21 publications

References 16 publications

Characterization of the bauxite mining of the Poços de Caldas alkaline massif and its socio-environmental impacts

Characterization of the bauxite mining of the Poços de Caldas alkaline massif and its socio-environmental impacts

Soil physical properties of high mountain fields under bauxite mining

Vegetation Cover Development Resulting from Different Restoration Approaches of Exploited Mines

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