scholarly journals Roots of Perennial Grasses in the Recovery of Soils Degraded by Coal Mining in Southern Brazil

2018 ◽  
Author(s):  
Lizete Stumpf ◽  
Otávio dos Anjos Leal ◽  
Eloy Antonio Pauletto ◽  
Luiz Fernando Spinelli Pinto
Keyword(s):  
Coal Mining ◽  
Perennial Grasses ◽  
Southern Brazil

The role of environmental factors in the composition of anuran species in several ponds under the influence of coal mining in southern Brazil

2017 ◽  
Vol 26 (3) ◽  
pp. 285-297 ◽  
Author(s):  
Guilherme S. De Lucca ◽  
Felipe A. P. Barros ◽  
J. Vladimir Oliveira ◽  
Jacir Dal Magro ◽  
Elaine M. Lucas
Keyword(s):  
Environmental Factors ◽  
Coal Mining ◽  
Southern Brazil ◽  
Anuran Species

scholarly journals Invisible contaminants and food security in former coal mining areas of Santa Catarina, Southern Brazil

2020 ◽  
Vol 16 (1) ◽  
Author(s):  
Graziela Dias Blanco ◽  
Rafael Barbizan Sühs ◽  
Escarlet Brizola ◽  
Patrícia Figueiredo Corrêa ◽  
Mari Lucia Campos ◽  
...  
Keyword(s):  
Food Security ◽  
Coal Mining ◽  
Southern Brazil ◽  
Santa Catarina ◽  
Mining Areas

scholarly journals Organic Matter Fractions and Quality of the Surface Layer of a Constructed and Vegetated Soil After Coal Mining. I - Humic Substances and Chemical Characterization

2015 ◽  
Vol 39 (3) ◽  
pp. 886-894 ◽  
Author(s):  
Otávio dos Anjos Leal ◽  
Rosa Maria Vargas Castilhos ◽  
Eloy Antonio Pauletto ◽  
Luiz Fernando Spinelli Pinto ◽  
Flávia Fontana Fernandes ◽  
...  
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Coal Mining ◽  
Chemical Characterization ◽  
Perennial Grasses ◽  
The Other ◽  
Paspalum Notatum ◽  
Natural Soil ◽  
Chemical Fractions

After open coal mining, soils are “constructed”, which usually contain low levels and quality of organic matter (OM). Therefore, the use of plant species for revegetation and reclamation of degraded areas is essential. This study evaluated the distribution of carbon (C) in the chemical fractions as well as the chemical characteristics and humification degree of OM in a soil constructed after coal mining under cultivation of perennial grasses. The experiment was established in 2003 with the following treatments: Hemarthria altissima (T1), Paspalum notatum (T2), Cynodon dactilon (T3), Urochloa brizantha (T4), bare constructed soil (T5), and natural soil (T6). In 2009, soil samples were collected from the 0.00-0.03 m layer and the total organic carbon stock (TOC) and C stock in the chemical fractions: acid extract (CHCl), fulvic acid (CFA), humic acid (CHA), and humin (CHU) were determined. The humic acid (HA) fraction was characterized by infrared spectroscopy and the laser-induced fluorescence index (ILIF) of OM was also calculated. After six years, differences were only observed in the CHA stocks, which were highest in T1 (0.89 Mg ha-1) and T4 (1.06 Mg ha-1). The infrared spectra of HA in T1, T2 and T4 were similar to T6, with greater contribution of aliphatic organic compounds than in the other treatments. In this way, ILIF decreased in the sequence T5>T3>T4>T1>T2>T6, indicating higher OM humification in T3 and T5 and more labile OM in the other treatments. Consequently, the potential of OM quality recovery in the constructed soil was greatest in treatments T1 and T4.

Soil compressibility and least limiting water range of a constructed soil under cover crops after coal mining in Southern Brazil

2012 ◽  
Vol 124 ◽  
pp. 190-195 ◽  
Author(s):  
Cláudia Liane Rodrigues de Lima ◽  
Ezequiel Cesar Carvalho Miola ◽  
Luis Carlos Timm ◽  
Eloy Antonio Pauletto ◽  
Alvaro Pires da Silva
Keyword(s):  
Coal Mining ◽  
Cover Crops ◽  
Southern Brazil ◽  
Soil Compressibility ◽  
Least Limiting Water Range

Leachability of major and minor elements from soils and sediments of an abandoned coal mining area in Southern Brazil

2015 ◽  
Vol 187 (3) ◽  
Author(s):  
Maria Josefa Santos ◽  
César Ricardo Teixeira Tarley ◽  
Isabella Cunha ◽  
Iago Zapelini ◽  
Evgeny Galunin ◽  
...  
Keyword(s):  
Coal Mining ◽  
Mining Area ◽  
Southern Brazil ◽  
Coal Mining Area ◽  
Minor Elements ◽  
Soils And Sediments

Valorization of iron pyrite from coal mining in southern Brazil

2019 ◽  
Vol 7 (1) ◽  
pp. 102931
Author(s):  
Camila Machado de Oliveira ◽  
Thuani Gesser Müller ◽  
Leticia Patricio Ferreira ◽  
Maria Alice Prado Cechinel ◽  
Michael Peterson ◽  
...  
Keyword(s):  
Coal Mining ◽  
Iron Pyrite ◽  
Southern Brazil

scholarly journals Geochemistry of acid mine drainage from a coal mining area and processes controlling metal attenuation in stream waters, southern Brazil

2014 ◽  
Vol 86 (2) ◽  
pp. 539-554 ◽  
Author(s):  
VERIDIANA P. CAMPANER ◽  
WANILSON LUIZ-SILVA ◽  
WILSON MACHADO
Keyword(s):  
Chemical Composition ◽  
Coal Mining ◽  
Surface Waters ◽  
Mine Drainage ◽  
Mining Area ◽  
Southern Brazil ◽  
Acid Drainage ◽  
Coal Mining Area ◽  
Brazilian Legislation ◽  
Ph Range

Acid drainage influence on the water and sediment quality was investigated in a coal mining area (southern Brazil). Mine drainage showed pH between 3.2 and 4.6 and elevated concentrations of sulfate, As and metals, of which, Fe, Mn and Zn exceeded the limits for the emission of effluents stated in the Brazilian legislation. Arsenic also exceeded the limit, but only slightly. Groundwater monitoring wells from active mines and tailings piles showed pH interval and chemical concentrations similar to those of mine drainage. However, the river and ground water samples of municipal public water supplies revealed a pH range from 7.2 to 7.5 and low chemical concentrations, although Cd concentration slightly exceeded the limit adopted by Brazilian legislation for groundwater. In general, surface waters showed large pH range (6 to 10.8), and changes caused by acid drainage in the chemical composition of these waters were not very significant. Locally, acid drainage seemed to have dissolved carbonate rocks present in the local stratigraphic sequence, attenuating the dispersion of metals and As. Stream sediments presented anomalies of these elements, which were strongly dependent on the proximity of tailings piles and abandoned mines. We found that precipitation processes in sediments and the dilution of dissolved phases were responsible for the attenuation of the concentrations of the metals and As in the acid drainage and river water mixing zone. In general, a larger influence of mining activities on the chemical composition of the surface waters and sediments was observed when enrichment factors in relation to regional background levels were used.

scholarly journals Perennial grasses for recovery of the aggregation capacity of a reconstructed soil in a coal mining area in southern Brazil

2014 ◽  
Vol 38 (1) ◽  
pp. 327-335 ◽  
Author(s):  
Lizete Stumpf ◽  
Eloy Antonio Pauletto ◽  
Flavia Fontana Fernandes ◽  
Luis Eduardo Akiyoshi Sanches Suzuki ◽  
Tiago Stumpf da Silva ◽  
...  
Keyword(s):  
Coal Mining ◽  
Cynodon Dactylon ◽  
Mining Area ◽  
Soil Aggregation ◽  
Perennial Grasses ◽  
Natural Soil ◽  
Heavy Machinery ◽  
Coal Mining Area ◽  
Hemarthria Altissima ◽  
Reconstructed Soil

The construction of a soil after surface coal mining involves heavy machinery traffic during the topographic regeneration of the area, resulting in compaction of the relocated soil layers. This leads to problems with water infiltration and redistribution along the new profile, causing water erosion and consequently hampering the revegetation of the reconstructed soil. The planting of species useful in the process of soil decompaction is a promising strategy for the recovery of the soil structural quality. This study investigated the influence of different perennial grasses on the recovery of reconstructed soil aggregation in a coal mining area of the Companhia Riograndense de Mineração, located in Candiota-RS, which were planted in September/October 2007. The treatments consisted of planting: T1- Cynodon dactylon cv vaquero; T2 - Urochloa brizantha; T3 - Panicum maximun; T4 - Urochloa humidicola; T5 - Hemarthria altissima; T6 - Cynodon dactylon cv tifton 85. Bare reconstructed soil, adjacent to the experimental area, was used as control treatment (T7) and natural soil adjacent to the mining area covered with native vegetation was used as reference area (T8). Disturbed and undisturbed soil samples were collected in October/2009 (layers 0.00-0.05 and 0.10-0.15 m) to determine the percentage of macro- and microaggregates, mean weight diameter (MWD) of aggregates, organic matter content, bulk density, and macro- and microporosity. The lower values of macroaggregates and MWD in the surface than in the subsurface layer of the reconstructed soil resulted from the high degree of compaction caused by the traffic of heavy machinery on the clay material. After 24 months, all experimental grass treatments showed improvements in soil aggregation compared to the bare reconstructed soil (control), mainly in the 0.00-0.05 m layer, particularly in the two Urochloa treatments (T2 and T4) and Hemarthria altissima (T5). However, the great differences between the treatments with grasses and natural soil (reference) indicate that the recovery of the pre-mining soil structure could take decades.

Sign in / Sign up

Export Citation Format

Share Document