Identification of sources and analysis of spatial
The mining and utilization of coal resources has not only promoted rapid economic development but also poses a potential threat to the ecological environment. The purpose of this study is to clarify the effects both of mining and land use types on the spatial distribution and particular sources of heavy metals in soil, using inverse distance …
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 …
Arsenic and Heavy Metals in Sediments Affected by Typical Gold Mining …
1. Introduction. Non-ferrous metal mining causes severe contamination of As and heavy metals (HMs). Due to the increasing activity and mobility in water [1,2], sediments are one of the major destinations for As and HMs migration and diffusion in the water [2,3].As and HMs accumulated in sediments are often tens or even hundreds of times the amount in …
Related health risk assessment of exposure to …
Furthermore, these mining activities can lead to increase the concentrations of heavy metals, such as arsenic (As), cadmium (Cd), Hg, lead (Pb), copper (Cu), and …
Immobilization of sulfates and heavy metals in gold …
Gold mining produces hazardous tailings wastes with elevated sulfur content and high levels of heavy metals including oxyanion elements such as V and As. This …
Global research progress on mining wastewater
Heavy metals seep into rocks, accumulating in raw materials, and releasing pollutants into the environment. 3 All of this happens naturally, either as a result of rainfall, melting snow, or groundwater. 9 Many ores, mining precious metals, such as gold (Au), copper (Cu), 10 arsenic (As), mercury (Hg), cyanide, and uranium (U), contain high ...
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 …
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 ...
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 ...
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.
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.
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 ...
Influence of the Artisanal Gold Mining on Soil Contamination with Heavy
Twenty soil samples were collected from North of Atbara (Dar-Mali locality),River Nile State, Sudan (17.82289 to 17.82389N and 33.99974 to 34.02127E) inside and outside gold mining area in order ...
Impacts of lead/zinc mining and smelting on the environment …
Mining and smelting are important economic activities. However, mining-related industries are also some of the largest sources of environmental pollution from heavy metals. China is one of the largest producers and consumers of lead and zinc in the world. A large amount of lead, zinc, and related elements, such as cadmium, have been …
Heavy Metals in the Soils of Placer Small-Scale Gold Mining …
The CEIC database reported that gold production in Myanmar was 1692 kg in 2015 and 1700 kg in 2016. 25 However, there have been few studies of the impacts of gold mining in Myanmar. The aim of the present study was to investigate As, Cd, Hg and Pb concentrations in the soil of placer small-scale gold mining stages in Banmauk …
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 …
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
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. …
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 …
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 ...
Heavy metal water pollution: A fresh look about hazards, …
Heavy metal removal using MFCs allows heavy metals with higher redox potential than the anode electrode to be removed and recovered in the cathode chambers (Bagchi and Behera, 2020). MFCs have even been used for in situ remediation in rivers, in which the results showed removals of 97.3% Hg 2 +, 87.7% Cu 2 + and 98.5% Ag 1 + …
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 ...
(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
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 ...
Related health risk assessment of exposure to arsenic and some heavy
Exposure to heavy metals in mining activities is a health issue among miners. This study was carried out at three small-scale gold mining sites situated in Banmauk Township, Myanmar and aims to ...
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 …
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 …
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 ...
Antimony-complexed heavy metal wastewater in antimony mining …
Additionally, chemical agents are used in the mining processes to improve ore recovery and utilization efficiency, which also contributes to the complex pollution of heavy metals in the wastewater, posing a threat to the surrounding ecosystems and water resources. ... which effectively removes acid salts and other heavy metals from mining ...
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 …