Latest News on Gold Mining : May 21

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Latest News on Gold Mining : May 21

May 1, 2021 Engineering 0

[1] Global trends in gold mining: Towards quantifying environmental and resource sustainability

In recent years, due to public concern over perceived and actual environmental impacts, the global mining industry has been moving towards a more sustainable framework. For gold mining, there are a number of fundamental issues with regard to assessing sustainability. Commonly perceived as a finite and non-renewable resource, long-term gold production trends include declining ore grades and increasing solid wastes (tailings, waste rock) and open cut mining. Conversely, core sustainability issues include water, energy and chemical consumption and pollutant emissions—also known as ‘resource intensity’. It is important to recognise the links between gold production trends and resource intensity, as this is critical for understanding future sustainability challenges. This paper links data sets on historic gold mining production trends with emerging sustainability reporting to estimate resource intensity, demonstrating the sensitivity of ore grade for gold production and sustainability. Final judgement of the sustainability of gold mining must take account of the sensitivity of the ore grade in the resource intensity of gold production. This has implications for environmental policy and sustainability reporting in the gold mining sector.

[2] Sustainability and gold mining in the developing world

Generally, the gold mining industry has a negative image because it is potentially highly polluting, its costs often externalized on local communities that host its operations. Recently, there has been growing activism in most countries where rich gold deposits exist. Although the industry has many drawbacks, it can potentially confer many benefits, especially for the people of the developing world, by providing employment and foreign exchange. In the context of the mining sustainable development debate, this paper examines the environmental performance of the gold mining industry in developing countries, and its impacts on resident populations and communities.

[3] The impact of gold price on the value of gold mining stock

The value of a gold mine is shown to be a function of the return on gold, production costs, the level of gold reserves, and the proportion of assets unrelated to gold price risk. Assuming that forward gold prices are the market’s unbiased expectations of future spot prices, a model is derived that estimates the theoretical gold price elasticity of gold mining stock. The model shows that if a company’s primary business is gold mining, the gold price elasticity of the company’s stock is greater than one. Using monthly data over the ten year period 1981 through 1990, the model is tested for a sample of 23 publicly traded gold mining companies.

 

[4] Environmental Assessment of Lead Contaminated Site from Artisanal Gold Mining in Bagega Community, Nigeria

Aims: The study assesses the extent of lead pollution in contaminated site from artisanal gold mining for remediation purposes.

Study Design:  Experimental design was used in field sampling of soil and water samples based on the land use and sources of water.

Study Area and Methodology: Bagega Community is located in Anka Local Government Areas in Zamfara State between the longitude 5.999E and 6.049E; And latitude 11.873N and 11.861N. Stratified random sampling method was used to collect soil samples from sites SSA, SSB, SSC, SSD and SSE while water samples were collected from wells, boreholes and ponds in accordance with ASTM D 6970 and EPA standard procedures. The lead values in soil and water samples were determined in accordance with ASTM D 3559 and ASTM D 1976 standard methods. The data were analyzed using inferential statistical methods of multivariable mean with use of the turkey test to separate the mean, while the significance of lead pollution was determined with one sample t – test.

Results: The mean value of lead in SSA was 3521.31 mg/kg, SSB was 3628.76 mg/kg, SSC was 3546.19 mg/kg, SSD was 9012.44 mg/kg and SSE was 7251.72 mg/kg, while the one sample t – test established that the mean value of lead in soil sample was significantly different from 400 mg/kg USEPA standard. The lead value in well and borehole water were within the WHO standard except the unprotected wells and boreholes with lead values as high as 131.0 µg/l and 30.33 µg/l in unprotected wells and boreholes. Meanwhile, 67.0% of the pond water recorded lead values that exceeded the WHO standard with a mean value of 1103.33 µg/l.

Conclusion: The soil and water samples with lead values that were above USEPA and WHO standards should be subjected to remediation.

[5] Evaluation of Serum Mercury and Microalbuminuria in Sudanese Traditional Gold Miners in Northern State

Traditional (Artisanal) gold mining is of global health concern; there is little available information about the health problems in gold traditional mining in Sudan. This study aimed to evaluate of serum mercury and microalbuminuria in Sudanese traditional gold miners. A total of 60 male miners (30 workers used or exposed to mercury and 30 workers used cyanide and exposed briefly to the mercury mixture with soil) as well as 30 male controls, in northern state of Sudan during March to May 2016. Mercury was analyzed by using standard technique atomic absorption spectrophotometer, and microalbuminuria was analyzed by semi-quantitative chromatographic immunoassay. The result we found significant increase in mercury levels in traditional gold miners, when compared with their control group but no significant difference when compared age between traditional miners and control group P Value=0.90, we also  found significant increase in mercury levels in traditional gold miners compared with company gold miners but no significant difference when compared age between traditional miners and company gold miners P Value=0.070, there was significant increase in mercury levels in company gold miners, when compared with their control group, also no significant difference when compared age between company gold miners and control group P Value =0.131), there were significant increase in mercury levels in inhalation route traditional miners, when compared with skin contact route traditional miners, there is significant increase in mercury levels in abnormal renal function of traditional gold miners compared with mercury levels in normal renal function of traditional gold miners. This study concludes that, serum mercury levels are significantly increased in traditional gold miners, working in Kodorma area in comparison to non-exposed subjects and mining company workers used cyanide.

 

 

Reference

[1] Mudd, G.M., 2007. Global trends in gold mining: Towards quantifying environmental and resource sustainability. Resources Policy32(1-2), pp.42-56.

[2] Kumah, A., 2006. Sustainability and gold mining in the developing world. Journal of Cleaner Production14(3-4), pp.315-323.

[3] Blose, L.E. and Shieh, J.C., 1995. The impact of gold price on the value of gold mining stock. Review of Financial Economics4(2), pp.125-139.

[4] Clement, A.O. and Olaniyan, O.Z., 2016. Environmental Assessment of Lead Contaminated Site from Artisanal Gold Mining in Bagega Community, Nigeria. Archives of Current Research International, pp.1-9.

[5] Khalid, K.K., Ibrahim, M.A., Fattah, M.A., Qureshi, S. and Karar, T., 2018. Evaluation of Serum Mercury and Microalbuminuria in Sudanese Traditional Gold Miners in Northern State. Current Journal of Applied Science and Technology, pp.1-8.

 

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