scholarly journals Ferns and Licophytes in Coal Mining Waste and Tailing Landfills

2021 ◽  
Author(s):  
Ariane Andreola ◽  
Daniely Neckel Rosini ◽  
Mari Lucia Campos ◽  
Josieli Pietro Biasi ◽  
Vanilde Citadini-Zanette ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Coal Mining ◽  
Mine Drainage ◽  
Coal Extraction ◽  
Mining Areas ◽  
Environmental Recovery ◽  
High Concentrations ◽  
Local Ecosystem ◽  
Pityrogramma Calomelanos ◽  
Ferns And Lycophytes

Abstract Mineral coal extraction in Santa Catarina State (Brazil) Carboniferous Basin has degraded the local ecosystem, restricting the use of its areas. One of the biggest environmental impacts in the mining areas is the uncontrolled disposal of waste and sterile mining with high concentrations of pyrite, which in the presence of air and water is oxidized promoting the formation of acid mine drainage (AMD). These contaminants can be leached into water resources, restrict the use of water, soil and cause threats to fauna and flora. This study aimed to characterize these areas as to the content of Cd, Pb, Ni and Zn metals in the tailings and waste resulting from coal mining and to survey the species of ferns and lycophytes present. Wastes and tailing samples and specimens of ferns and lycophytes were collected in 23 landfills in six municipalities in the region and in four underlying areas used as controls. Chemical and physical analyses (pH in water and pH in KCl, Ca, Mg, P, K, Na, Mn, Fe, Al, clay and OM contents) were carried out and the total contents of heavy metals Cd, Pb were determined, Ni and Zn. Sampling of ferns and lycophytes was carried out by walking. The levels of heavy metals, Cd, Ni and Zn were below the prevention concentrations established by CONAMA Resolution 420/2009. Pb levels were above prevention values ​​in four landfills. Sixteen species of ferns and one lycophyte were found, with hemicryptophytes the most frequent and helophytes the most adapted to the environment. Of the species found, Pteridium esculentum (G. Forst.) Cockayne, Pityrogramma calomelanos (L.) Link and Telmatoblechnum serrulatum (Rich.) Perrie, DJ Ohlsen & Brownsey demonstrated resistance to degraded and contaminated environments with Pb, which may constitute an alternative for projects monitoring and environmental recovery.

scholarly journals Spatial Variation of Water Chemistry in Aries River Catchment Western Romania

2021 ◽  
Vol 11 (14) ◽  
pp. 6592
Author(s):  
Ana Moldovan ◽  
Maria-Alexandra Hoaghia ◽  
Anamaria Iulia Török ◽  
Marius Roman ◽  
Ionut Cornel Mirea ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Water Chemistry ◽  
Water Samples ◽  
Mine Drainage ◽  
Pollution Indices ◽  
Mining Activities ◽  
River Catchment ◽  
High Concentrations ◽  
The Impact

This study aims to investigate the quality and vulnerability of surface water (Aries River catchment) in order to identify the impact of past mining activities. For this purpose, the pollution and water quality indices, Piper and Durov plots, as well vulnerability modeling maps were used. The obtained results indicate that the water samples were contaminated with As, Fe, Mn, Pb and have relatively high concentrations of SO42−, HCO3−, TDS, Ca, K, Mg and high values for the electrical conductivity. Possible sources of the high content of chemicals could be the natural processes or the inputs of the mine drainage. Generally, according to the pollution indices, which were correlated to high concentrations of heavy metals, especially with Pb, Fe and Mn, the water samples were characterized by heavy metals pollution. The water quality index classified the studied water samples into five different classes of quality, namely: unsuitable for drinking, poor, medium, good and excellent quality. Similarly, medium, high and very high vulnerability classes were observed. The Durov and Piper plots classified the waters into Mg-HCO3− and Ca-Cl− types. The past and present mining activities clearly change the water chemistry and alter the quality of the Aries River, with the water requiring specific treatments before use.

scholarly journals Formation and characterization of acid mine drainage in the Madzharovo ore field, Southeastern Bulgaria

2021 ◽  
Vol 35 (1) ◽  
pp. 41-50
Author(s):  
Svetlana Bratkova
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Negative Impact ◽  
Sulfide Minerals ◽  
Mining Areas ◽  
Acid Mine ◽  
Zinc Cadmium ◽  
High Concentrations ◽  
Cadmium Lead ◽  
The Impact

The formation of acid mine drainage (AMD) is a serious environmental problem in areas with mining and processing industries worldwide. Their generation is associated with chemical and biological processes of oxidation of sulfide minerals, mainly pyrite. Sources of AMD can be deposits of sulfide minerals and coal with a high content of pyrite sulfur, mining waste and some tailings. The impact of AMD on surface and groundwater in mining areas continues for decades after the cessation of extraction. An example of the negative impact of generated acid mine drainage on the state of surface waters is in the region of Madzharovo. Years after the cessation of mining, the waters at the discharge points "Momina Skala", "Harman Kaya" and "Pandak Dere" are characterized by low pH values and high concentrations of iron, copper, zinc, cadmium, lead and manganese.

Stable isotopes as a tool for determining transformation and fate of sulphur in AMD affected water bodies in Meghalaya

2021 ◽  
Author(s):  
Vivek Kumar ◽  
Dibyendu Paul ◽  
Sudhir Kumar
Keyword(s):  
Stable Isotopes ◽  
Coal Mining ◽  
Environmental Fate ◽  
Mine Drainage ◽  
Chemical Elements ◽  
Aquatic Systems ◽  
Water Bodies ◽  
Hydrochemical Parameters ◽  
Dominant Form ◽  
Mining Areas

<p>Meghalaya, also known as ‘abode of clouds’, is a state located in north-eastern part of India, blessed with abundance of water resources. In the last few decades, extensive coal mining in different parts of Meghalaya has caused detrimental changes in the environment, particularly the aquatic systems. Acid and metal loaded effluents (also known as acid mine drainage or AMD), resulting from the exposure of sulphide mineralization to oxidizing conditions from abandoned or active mining areas, are the principal environmental problems today. Sulphate (SO<sub>4</sub><sup>2-</sup>) is a major contaminant and attracts widespread attention as the dominant form of sulphur in coal mining affected aquatic systems. The increased presence of SO<sub>4</sub><sup>2- </sup>in ecosystems affected by mining activities has immense negative environmental and human health effects. Low pH and high heavy metal concentrations have been reported from streams flowing in and around the coal mining area in Meghalaya rendering the water quality to be very poor  and unfit for use as potable water.</p><p>Stable isotopes have emerged as a promising environmental tracer to understand different environmental functions and processes. Valuable information on the sources and processes can be obtained from the stable isotope ratios of chemical elements in environmental samples as the sources and processes influence history of the samples. Stable isotopes analysis combined with hydrochemical analysis enhances our understanding of transformation and environmental fate of different compounds in water bodies and can provide precise information about factors responsible for controlling water chemistry of different water bodies.</p><p>Stable isotopes of sulphur and oxygen combined with hydrochemical parameters were used as a tool for determining origin, transformation and fate of sulphur in AMD affected water bodies in Meghalaya.The study was conducted on two rivers affected by AMD, viz. Myntdu River and Lunar-Lukha River, flowing in the Jaintia Hills region of Meghalaya. The water samples collected are analysed for hydrochemical parameters and stable sulphur and oxygen isotopes (δ<sup>34</sup>S and δ<sup>18</sup>O in aqueous SO<sub>4</sub><sup>2-</sup>). The stable isotopes of sulphur and oxygen were also analysed in the coal samples from the nearby mining areas. The result provided an insight into the transformational processes of sulphur in these two AMD affected rivers and the environmental fate of sulphur.</p>

scholarly journals Harmonization of the Development of a Resource Region (Based on the Kuzbass)

2019 ◽  
pp. 34-41
Author(s):  
Yuri Fridman ◽  
Galina Rechko ◽  
Ekaterina Loginova
Keyword(s):  
Natural Gas ◽  
Coal Mining ◽  
Business Models ◽  
Mineral Resources ◽  
Coal Industry ◽  
Coal Extraction ◽  
Conceptual System ◽  
Infrastructure Development ◽  
Mining Areas ◽  
Oil And Natural Gas

The article considers the problems related to harmonizing the development of a resource area (a region). Modern scientific literature generally presents resource areas as regions producing oil and natural gas. In the context of the article, Kemerovo Region – Kuzbass is selected as the object of this study, where neither oil nor natural gas are produced, and where the fundamental industry is coal mining. We point out that, in the absence of consensus between authorities and business concerning the prospective development of the region, its economy may decay even despite obvious success in coal extraction and processing. It is strategically important for the Kuzbass to create an efficient infrastructure for transforming the development of the coal industry into the economy-wide development of the region. Taking into account the best international harmonization practices, we propose a conceptual system of mechanisms aimed at coordinating the interests of commoditydriven business and resource area. It is built on defining, assessing and launching the mechanisms for harmonizing ‘common grounds’ shared by coal industry and Kemerovo Region. These mechanisms are as follows: first, moving the decision-making center concerned with mineral resources development into the region imminently close to coal-mining areas; second, effective tax administration; third, increasing localization; fourth, regional infrastructure development; fifth, a new environmental standard for the region; and sixth, a fair social standard in the region. The concept in question relies on the need to introduce business models to the industry management that would harmonize with the interests of the territory. At the same time, the territory should start to build a new economy by creating new standards that would establish requirements for doing business.

scholarly journals Study on soil pollution caused by heavy metals in coal mining areas and vegetation restoration in surrounding areas

2021 ◽  
Author(s):  
Xun Wang
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Coal Mining ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Soil Layer ◽  
Mining Area ◽  
Vegetation Restoration ◽  
Mining Areas ◽  
Ligustrum Lucidum

Abstract In this study, taking a coal mining area as an example, three vegetation restoration modes were designed: Populus L., Ligustrum lucidum Ait., and Amygdalus persica L., and soil and plant samples were collected to determine and evaluate the heavy metals. It was found that all the three modes were effective in eliminating heavy metal pollution in the soil, especially Populus L. and Ligustrum lucidum Ait.; in the soil layer at a depth of 0–20 cm, the content of Cd was the lowest (2.68 mg/kg) in Populus L., and the content of Cr and Pb was the lowest (58.64 mg/kg and 95.36 mg/kg) in Ligustrum lucidum Ait., which was significantly lower than that in the bare land. The evaluation results demonstrated that the pollution under Populus L. and Ligustrum lucidum Ait. modes was moderate. In the aspect of the heavy metal content in plants, the content of Cd was the lowest, and the content of Cr and Pb was high. In the same plant, the content of heavy metals in the leaf was the lowest, followed by the stem and root. The experimental results show that the vegetation restoration mode can relieve the heavy metal pollution, which makes some contributions to solve the ecological restoration problem in coal mining areas.

scholarly journals Analysis of Soil and Microbial Characteristics and Microbial Response in Rare Earth Mining Areas in Jiangxi Province, China.

2021 ◽  
Author(s):  
Zhentian Liang ◽  
Wenjing Zhang ◽  
Yuesuo Yang ◽  
Jincai Ma ◽  
Shuxin Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Relative Abundance ◽  
Metabolic Pathways ◽  
Mining Area ◽  
Ammonia Nitrogen ◽  
Jiangxi Province ◽  
Plant Nitrogen ◽  
Mining Areas ◽  
Environmental Recovery

Abstract There is a certain connection between the microbial community and functional flora in rare earth mining areas, but the pollution characteristics and pollution metabolic pathways in the mining area are still unclear. The conditions of heavy metals, rare earth elements, and microorganisms after the mining of rare earth mines were studied in this paper. It was found that after mining, all the sampling areas showed low pH and low total organic carbon(TOC), accompanied by high iron and aluminum concentrations. The development of vegetation is closely related to the development level of microorganisms. In the complex environment of rare earth mining areas, the Proteobacteria showed an absolute competitive advantage. In the process of mine environmental recovery, the relative abundance of Acidobacteria will increase significantly, but with the further development of restoration, the relative abundance of Firmicutes in rare earth mining areas will gradually decrease. There are many genera of bacteria related to the N cycle and heavy metal metabolism in the study area, indicating important metabolic pathways of ammonia nitrogen and heavy metals in rare earth mining areas. At the same time, the study found that there are bacterial genera that promote plant nitrogen fixation in the area, further revealing the nitrogen cycle.

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