Effect of heavy metals on substrate utilization pattern, …
DOI: 10.1016/J.ECOENV.2005.12.013 Corpus ID: 32557480; Effect of heavy metals on substrate utilization pattern, biomass, and activity of microbial communities in a reclaimed mining wasteland of red soil area.
اقرأ أكثر
Health Risk Assessment of Heavy Metals in Soils from …
Study Area. The study area is a gold mining area situated some 70 km west of Johannesburg in the Gauteng Province of South Africa. It lies between 26 18' S–26 26' S latitude and 27 23' E–27 31' E longitude. Gold exploration in the area dates back to 1898 and mining started from 1945 to date.
اقرأ أكثر
Waste Management in the Gold and Silver Industry
Table 6.5 shows the average grade of gold ores at Barrick operations. In 2016, the average grade of gold at major mines owned by Barrick was lower than 4 g/ton. There are many gold miners, including Barrick, that are processing gold ores having less than 1 g/ton of gold. One troy ounce of gold is equal to 31.10 g.
اقرأ أكثر
Assessment of Heavy Metal Pollution in a Gold Mining …
Heavy metals are introduced to the soil through parent rocks and anthropogenic activities. Mining, seepage from landfills, pesticide application, industrial effluents, and irrigation of soil with ...
اقرأ أكثر
Comprehensive Water Quality and Heavy Metal Pollution
Uncontrolled artisanal and semi-mechanized mining activities generate growing pressure on water resources. This work investigated the water quality status and the metal contamination of the Lom River water in the vicinity of gold mining area of Bekao, Adamawa region of Cameroon using water quality index (WQI) and five pollutions …
اقرأ أكثر
Arsenic and Heavy Metals in Sediments Affected by Typical Gold Mining …
Gold mining is associated with serious heavy metal pollution problems. However, the studies on such pollution caused by gold mining in specific geological environments and extraction processes remain insufficient. This study investigated the accumulation, fractions, sources and influencing factors of arsenic and heavy metals in …
اقرأ أكثر
Recent bioleaching approaches employed for the extraction of metals …
Recovery of the resources is considered to be a significant thing in the perspective of saving the cost economically and also for sustainable future utilization efficiently. Metals are extracted by mining processes in mines located on all over the world to consummate the needs put forth by the developing society.
اقرأ أكثر
Experimental research on the utilization of gold mine …
The gold mine tailings applied in this work were provided by a gold mine in Shangrao, Jiangxi, China, with an average particle size of 14.29 μm. Fig. 1 shows the particle size distribution (determined by HELOS-OASIS laser particle size analyzer, Germany) of magnesia and gold mine tailing. The GT powders had a smaller particle …
اقرأ أكثر
Arsenic and Heavy Metals in Sediments Affected by …
In addition, arsenic and most tested heavy metals have different pollution and ecological risks, especially As and Sb. Compared with the other gold mining areas, the arsenic and the heavy metal sediments in the area of this study have higher pollution and ecological risks. The results of this study show that the local government must monitor ...
اقرأ أكثر
Metals Recovery from Acid Mine Drainage and
Timely heavy metal treatment and landscape restoration of extracted gold mines and environmentally friendly approaches such as bio-mining of unexplored gold mines where adequate protection is ...
اقرأ أكثر
Heavy metal contamination in the vicinity of gold …
Chen et al. investigated the concentration, distribution, sources, and influencing factors of arsenic and heavy metals in sediments from a gold mine area in …
اقرأ أكثر
Progress, Challenges, and Perspectives of Bioleaching for …
Heavy metal mining and process- ... 35% of China's gold reserves, of which 76% of gold and 32.5% of silver is produced by copper mines [7]. Moreover, rare earth elements are essential components of high-tech ... the full exploitation and utilization of …
اقرأ أكثر
The environmental impact of gold mines: pollution by …
contribution of gold mining to the accumulation of heavy metals in different environmental media. 2. Processing plant At the processing plant, gold is extracted from the ore by cyanide leaching method where piles of crushed ore are soaked with cyanide solution. The ore processing consists of the following stages: • Crushing and grinding of ...
اقرأ أكثر
heavy metals utilization gold mining
heavy metals utilization gold mining T02:01:35+00:00 heavy metals utilization gold mining. Samples were collected from the gold mining plant area in tailings, stream waters, soils and crop plants The collected samples were analyzed for 13 heavy metals including vanadium (V), chromium (Cr), manganese (Mn), nickel (Ni), …
اقرأ أكثر
Impact of heavy metals on the environment and human …
1. Introduction. Periodic table consists of heavy metals to a notable portion with high density and atomic weight. Among them, the majorities are found in the biosphere, such as in water, soils, and rocks, and are also released into the surroundings from anthropogenic resources, mostly commercial and industrial.
اقرأ أكثر
Toxicological effects of mining hazard elements
PM 2.5 is derived from common sources of atmospheric pollution, such as automotive vehicles, mining operations, biomass burning, and industrial emissions (Nor et al., 2021).PM is harmful to health because it contains chemical compounds, especially PM 2.5, with a high range and strong absorption capacity (Ding et al., 2021).Additionally, PM …
اقرأ أكثر
(PDF) Adsorption of Heavy Metals from Small-Scale Gold
Acheampong MA, Me ulepas RJW, Lens PN L (2010) Removal of heavy metals and cyanide from gold mine wastewater. J Chem Te chnol Biotechnol 85:590–613. https://doi.or g/10.1002/jctb.2358
اقرأ أكثر
Arsenic and Heavy Metals in Sediments Affected by …
Gold mining is associated with serious heavy metal pollution problems. However, the studies on such pollution caused by gold mining in specific geological …
اقرأ أكثر
Environmental Pollution by Heavy Metals in the Gold Mining …
The main objective of this study is to assess the level of heavy metals pollution in soil samples collected around gold mines located in Betaré Oya (BO) and Batouri (BA) in Eastern Cameroon. Elemental analysis of soil samples was carried out using Quant´X EDXRF spectrometer. Its sensitivity and accuracy were increased by using the …
اقرأ أكثر
Heavy Metals and Human Health: Possible Exposure Pathways and …
There are many ways heavy metals can enter the environment and agriculture. Heavy metal contamination of foods originates by weathering of the bedrock, air pollution directly, as well as soil irrigation with polluted waters and polluting groundwater . Environmental contamination, primarily by industrial and human activity, refers to soil or ...
اقرأ أكثر
Removal of heavy metal ions from wastewater: a comprehensive …
The presence of heavy metals in wastewater has been increasing with the growth of industry and human activities, e.g., plating and electroplating industry, batteries, pesticides, mining industry ...
اقرأ أكثر
Research of Heavy Metals Pollution Soil Risk Evaluation by …
[14] Chen Y. 2017 Review on Remediation and Safety Utilization of Heavy Metal Pollution of Farmland Soil in China J. Modern Agricultural Science & Technology. Google Scholar [15] Hu M, Wu J Q, Peng P Q et al. 2014 Assessment model of heavy metal pollution for arable soils and a case study in a mining area J. Acta scientiae circumstantiae 34 423-430
اقرأ أكثر
heavy metals utilization gold mining
heavy metals utilization gold mining T11:08:38+00:00; Heavy Metal Pollution from Gold Mines: Environmental . This review focuses on environmental impacts of increasing heavy metal pollution caused by gold mining activities on human health and the environment and how bacteria interact with these metals 2 Gold Processing and …
اقرأ أكثر
Bioflocculant production and heavy metal sorption by metal …
Pseudomonas koreensis and Pantoea sp. were isolated from a gold mining soil and assessed for bioflocculant production.. 71% and 51% flocculation were obtained at optimum conditions (pH 7.5 and 30 °C) for Pantoea sp. and P. koreensis respectively.. Glucose gave the highest yield of 2.98 g L −1 and 3.26 g L −1 for Pantoea sp. and P. …
اقرأ أكثر
Arsenic and Heavy Metals in Sediments Affected by …
The research result is of great significance for preventing and controlling the sediment pollution of arsenic and heavy metals near the same type of gold mining area. In …
اقرأ أكثر
Heavy Metals in the Soils of Placer Small-Scale Gold …
Concentrations of heavy metals associated with gold, such as copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), mercury (Hg) and lead (Pb) can increase in the …
اقرأ أكثر
Current situation and prospects for the clean utilization of gold …
By summarizing the chemical composition of typical gold tailings, it is found that the gold tailings mainly contain SiO 2, a certain amount of CaO, Fe 2 O 3, Al 2 O 3, MgO and a small amount of precious metals (such as Au, Ag) and heavy metals (such as Cu, Pb, Zn). Therefore, comprehensive utilization of effective chemical components in gold ...
اقرأ أكثر
Frontiers | The influence of gold mining wastes on …
Understanding the characteristic heavy metals and their migration-transformation behavior in mining areas is essential for the prevention and control of …
اقرأ أكثر
Assessment of selected heavy metal concentrations in soils …
The study investigated the contents of selected heavy metals in top soils and sub-soils around the vicinity of artisanal gold mining site in Minna, Niger state, using standard procedures. Digestion was done using HNO3–H2O2–HCl and heavy metal content using atomic absorption spectrometer. The results obtained showed some extent …
اقرأ أكثر
IJERPH | Free Full-Text | Heavy Metal Pollution from …
This review focuses on the effects of heavy metal wastes generated from gold mining activities on the environment and the various mechanisms used by bacteria …
اقرأ أكثر