scholarly journals A re-assessment of metal pollution in the Dexing mining area in Jiangxi province, China: current status, hydro-geochemical controls, and effectiveness of remediation practices

2022 ◽  
Author(s):  
S. Xie ◽  
C. Yu ◽  
B. Peng ◽  
H. Xiao ◽  
W. Zhang ◽  
...  
Keyword(s):  
Metal Pollution ◽  
Mine Drainage ◽  
Mining Area ◽  
Open Pit ◽  
Current Status ◽  
Jiangxi Province ◽  
Copper Mine ◽  
Guideline Values ◽  
Living Organisms ◽  
Comparison Of The Results

AbstractThis study re-assess the environmental impacts of the Dexing copper mine (the largest open-pit copper mine in Asia) on the Lean river and its two tributaries (the Dawu river and Jishui river) in the Jiangxi province, China, with particular focus on metal pollution as well as the effectiveness and side-effects of remediation activities. Results show that the Dawu river and its mixing zone with the Lean river were still heavily influenced by acid mine drainage (AMD) and loaded with elevated levels of metals, in particular Mn, Ni, and Al whose concentrations were frequently above the health-based guideline values. Manganese and Ni in the AMD-impacted waters were predicted to occur as free ions or sulfate and carbonate complexes, and thus highly-toxic to living organisms. Although Al in the AMD-impacted waters was predicted to exist largely as colloidal hydroxides with low bioavailability, abundant formation of such nano-sized particles could impair the respiratory and circulatory systems of aquatic macro-invertebrates. The integration and comparison of the results from the current and previous studies show that the concentrations of several metals (Cu, Zn, and Cd) in the Dawu river decreased significantly after 2011–2012, during which several remediation practices were implemented (e.g., AMD neutralization, excavation of contaminated sediments in impounded rivers, and rehabilitation of mine tailings and open-pit slopes). This provides evidence that these remediation practices have effectively limited the dispersion of metals from the mining area. However, AMD neutralization greatly enhanced the release of sulfate, making the mining area an even more important sulfate source.

Heavy Metal Pollution in Topsoil and Vegetables in the Typical Mining Area Near Gannan, Jiangxi Province, China

2019 ◽  
Vol 36 (10) ◽  
pp. 1307-1314
Author(s):  
Ming Chen ◽  
Fengguo Li ◽  
Lanwen Hu ◽  
Tao Yang ◽  
Quan Yang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Mining Area ◽  
Jiangxi Province

Significance of Delayed Geochemical Hazard of Cd in Dawu River Domain in the Dexing Copper Mine, Jiangxi Province

2012 ◽  
Vol 236-237 ◽  
pp. 705-708
Author(s):  
Yong Qiang Yang ◽  
Xiao Liang Wang ◽  
Yuan Yi Zhao ◽  
Lei Huang ◽  
Yan Xia Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Critical Point ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Ecological Environment ◽  
Jiangxi Province ◽  
Low Grade ◽  
Copper Mine ◽  
Successive Extraction ◽  
Huge Impact

The smelting factory of Dexing Copper Mine is separated, so mine stripping material and low grade ore yards have huge impact on the environment. For a variety of reasons, the efficiency of operation of the environmental protection facilities in Dexing Copper Mine area was so low that all the acid wastewater was not treated well before discharge. This can lead to a problem that extracting copper and other metal mineral from the low grade ore in the waste stone, and also produce acidic wastewater and heavy metal pollution. Finally, the wastewater discharge into the Dawu River has made huge impact on water, soil, ecological environment. Based on the mathematical model of DGH, this paper analyzed the soil samples of Dexing Copper Mine in the Dawu River domain by the method of successive extraction. The results reveals the DGH characteristics of Cd element in the soil of downstream Dawu River. Cd element in the soil of downstream of Dawu Rive tends to shift from TRCP-Cd (total releasable content of Cd element) to TCAS-Cd (total concentration of active species of Cd element). The critical point of outbreak is TRCP=185.90 ng/g. 36% of the samples of downstream Dawu River oversteps the critical point of outbreak, making it possible to break out. Meanwhile, the analysis of DGH of Cd element is of great significance to early-warning of soil heavy metal pollution and improvement of ecological environment in the study area.

Diversity of Prokaryotic Communities Indigenous to Acid Mine Drainage and Related Rocks from Baiyin Open-Pit Copper Mine Stope, China

2018 ◽  
Vol 35 (7) ◽  
pp. 580-600 ◽  
Author(s):  
Wasim Sajjad ◽  
Guodong Zheng ◽  
Gaosen Zhang ◽  
Xiangxian Ma ◽  
Wang Xu ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Open Pit ◽  
Copper Mine ◽  
Acid Mine

Underground Degradation of Lignite Coal Spoil Material by a Mixed Microbial Community under Acid Mine Drainage Conditions

2013 ◽  
Vol 825 ◽  
pp. 46-49 ◽  
Author(s):  
Sabine Willscher ◽  
Doreen Knippert ◽  
Heiko Ihling ◽  
Denise Kühn ◽  
Sophie Starke
Keyword(s):  
Microbial Community ◽  
Ground Water ◽  
Mine Drainage ◽  
Mining Area ◽  
Open Pit ◽  
Open Pit Mining ◽  
Oxic Zone ◽  
Mixed Microbial Community ◽  
Lignite Coal ◽  
Long Term Impact

In a field study, biogeochemical processes in a large lignite coal spoil area with moderate AMD generation were investigated. Underneath this area, large amounts of groundwater are impacted by degradation and transformation processes of coal remainders in the former open pit mining area. An investigation was performed to find out the sources for the ground and surface water contaminations of larger areas. Samples were taken from different places and different depths of the coal spoil area and were investigated for different metabolic groups of microorganisms. As a result, fungi are able to degrade humic matter in coal spoil heaps in a first step to oligomers. Other microorganisms do a further degradation of first intermediates in a commensalic community. Streptomycetes do a cleavage of lignocelluloses, strepto- and other actinomycetes also degrade cellobiose and xylose related parts of the humic coal spoil matter. The different members of the microbial community exist in different “floors” of the spoil area: fungi and most Actinomycetes prefer the oxic zone, whereas degraders of aromatic and heterocyclic compounds can also exist in the capillary and ground water zones; here more frequently Arthrobacter, Pseudomonas, Rhodococcus and Mycobacterium strains were detected. Ferric iron formed in biooxidation of pyrite seems to play an important role as a catalyst for oxic as well as anaerobic degradation of complex organic matter in the underground. A complex linkage between microbial Fe-, S-, C- and N-cycles was figured out on this site that induces a high and long-term impact on ground water contamination in this area.

scholarly journals MONITORING METAL POLLUTION LEVELS IN MINE WASTES AROUND A COAL MINE SITE USING GIS

2017 ◽  
Vol IV-4/W4 ◽  
pp. 335-338 ◽  
Author(s):  
D. Sanliyuksel Yucel ◽  
M. A. Yucel ◽  
B. Ileri
Keyword(s):  
Coal Mine ◽  
Metal Pollution ◽  
Mine Drainage ◽  
Mine Waste ◽  
Geographical Information ◽  
Open Pit ◽  
Mine Wastes ◽  
Mine Site ◽  
Pollution Levels ◽  
Nw Turkey

In this case study, metal pollution levels in mine wastes at a coal mine site in Etili coal mine (Can coal basin, NW Turkey) are evaluated using geographical information system (GIS) tools. Etili coal mine was operated since the 1980s as an open pit. Acid mine drainage is the main environmental problem around the coal mine. The main environmental contamination source is mine wastes stored around the mine site. Mine wastes were dumped over an extensive area along the riverbeds, and are now abandoned. Mine waste samples were homogenously taken at 10 locations within the sampling area of 102.33 ha. The paste pH and electrical conductivity values of mine wastes ranged from 2.87 to 4.17 and 432 to 2430 μS/cm, respectively. Maximum Al, Fe, Mn, Pb, Zn and Ni concentrations of wastes were measured as 109300, 70600, 309.86, 115.2, 38 and 5.3 mg/kg, respectively. The Al, Fe and Pb concentrations of mine wastes are higher than world surface rock average values. The geochemical analysis results from the study area were presented in the form of maps. The GIS based environmental database will serve as a reference study for our future work.

scholarly journals Managing and Reforesting Degraded Post-Mining Landscape in Indonesia: A Review

Land ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 658
Author(s):  
Pratiwi ◽  
Budi H. Narendra ◽  
Chairil A. Siregar ◽  
Maman Turjaman ◽  
Asep Hidayat ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Success Rate ◽  
Coal Mining ◽  
Best Management Practices ◽  
Mine Drainage ◽  
Forest Area ◽  
Tree Planting ◽  
Open Pit ◽  
Open Pit Mining ◽  
Acid Mine

Tropical forests are among the most diverse ecosystems in the world, completed by huge biodiversity. An expansion in natural resource extraction through open-pit mining activities leads to increasing land and tropical forest degradation. Proper science-based practices are needed as an effort to reclaim their function. This paper summarizes the existing practice of coal mining, covering the regulatory aspects and their reclamation obligations, the practices of coal mining from various sites with different land characteristics, and the reclamation efforts of the post-mining landscapes in Indonesia. The regulations issued accommodate the difference between mining land inside the forest area and outside the forest area, especially in the aspect of the permit authority and in evaluating the success rate of reclamation. In coal-mining practices, this paper describes starting from land clearing activities and followed by storing soil layers and overburden materials. In this step, proper handling of potentially acid-forming materials is crucial to prevent acid mine drainage. At the reclamation stage, this paper sequentially presents research results and the field applications in rearranging the overburden and soil materials, controlling acid mine drainage and erosion, and managing the drainage system, settling ponds, and pit lakes. Many efforts to reclaim post-coal-mining lands and their success rate have been reported and highlighted. Several success stories describe that post-coal-mining lands can be returned to forests that provide ecosystem services and goods. A set of science-based best management practices for post-coal-mine reforestation is needed to develop to promote the success of forest reclamation and restoration in post-coal-mining lands through the planting of high-value hardwood trees, increasing trees’ survival rates and growth, and accelerating the establishment of forest habitat through the application of proper tree planting technique. The monitoring and evaluation aspect is also crucial, as corrective action may be taken considering the different success rates for different site characteristics.

scholarly journals Physicochemical factors affecting the wettability of copper mine blasting dust

2021 ◽  
Author(s):  
Longzhe Jin ◽  
Jianguo Liu ◽  
Jingzhong Guo ◽  
Jiaying Wang ◽  
Tianyang Wang
Keyword(s):  
Particle Size ◽  
Physicochemical Properties ◽  
Pore Structure ◽  
Total Pore Volume ◽  
Open Pit ◽  
X Rays ◽  
Factors Affecting ◽  
Copper Mine ◽  
Mineral Components ◽  
Hydrophobic Component

AbstractTo investigate the factors affecting the wettability of copper mine blasting dust, the primary blasting dust was collected from an open-pit copper mine and separated into hydrophilic blasting dust (HLBD) and hydrophobic blasting dust (HBBD) using water flotation method. The physicochemical properties of HLBD and HBBD were measured and compared with each other. The properties included particle size distributions (PSDs), micromorphologies, pore structures, mineral components and surface organic carbon functional groups. The results show that particle size and pore structure of the blasting dust are the main factors affecting its wettability. Specifically, particle size of HBBD is smaller than that of HLBD, and their respiratory dust (less than 10 µm) accounts for 61.74 vol% and 53.00 vol%, respectively. The pore structure of HBBD is more developed, and the total pore volume of HBBD is 1.66 times larger than that of HLBD. The identical mineral compositions were detected in HLBD and HBBD by X-rays diffraction (XRD); however, the surface organic hydrophobic component of HBBD is slightly larger than that of HLBD, this may be the reason for the poor wettability of HBBD. This study is significant to understand the effects of physicochemical properties of copper mine blasting dust on its wettability.

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