Potassium Aluminate Geopolymerisation of Acidic Gold Mine Tailings

2018 ◽  
pp. 270-275 ◽  
Author(s):  
Felix Ndubisi Okonta ◽  
Thabo Falayi ◽  
Freeman Ntuli
Keyword(s):  
Mine Tailings ◽  
Gold Mine ◽  
Gold Mine Tailings

Compaction of peat cover over desulfurized gold mine tailings changes: Arsenic speciation and mobility

2021 ◽  
Vol 128 ◽  
pp. 104923
Author(s):  
T.V. Rakotonimaro ◽  
M. Guittony ◽  
C.M. Neculita
Keyword(s):  
Mine Tailings ◽  
Arsenic Speciation ◽  
Gold Mine ◽  
Gold Mine Tailings

scholarly journals Potential utilization of artisanal gold-mine tailings as geopolymeric source material: preliminary investigation

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
John Paul J. Aseniero ◽  
Einstine M. Opiso ◽  
Marybeth Hope T. Banda ◽  
Carlito B. Tabelin
Keyword(s):  
Mine Tailings ◽  
Preliminary Investigation ◽  
Source Material ◽  
Gold Mine ◽  
Gold Mine Tailings

scholarly journals Growth, histochemical and physiological responses of non-edible oil producing plant (Reutealis trisperma) to gold mine tailings

2018 ◽  
Vol 19 (4) ◽  
pp. 1294-1302 ◽  
Author(s):  
MUHAMMAD HILMI ◽  
HAMIM HAMIM ◽  
YOHANA C. SULISTYANINGSIH ◽  
TAUFIKURAHMAN TAUFIKURAHMAN
Keyword(s):  
Mine Tailings ◽  
Shoot Growth ◽  
Physiological Responses ◽  
Gold Mine ◽  
Histochemical Analysis ◽  
Root And Shoot Growth ◽  
Gold Mine Tailings ◽  
Chlorophyll A And B ◽  
Anatomical Characters ◽  
High Level

Hilmi M, Hamim H, Sulistyaningsih YC, Taufikurahman. 2018. Growth, histochemical and physiological responses of nonedibleoil producing plant (Reutealis trisperma) to gold mine tailings. Biodiversitas 19: 1294-1302. Reutealis trisperma (Blanco) AiryShaw is a non-edible biodiesel producing plant that is able to grow well in various unfavorable environmental conditions. The studyaimed to analyze the growth, physiological, and anatomical responses of R. trisperma to gold mine tailings. Three-month-old of R.trisperma were grown in 8 kg of polybags contained with mixed soil-compost medium treated with 0, 25, 50 and 100% of gold minetailings for 3 months. Root and shoot growth, physiological and anatomical characters, and histochemical analysis of Pb inside the rootsand leaves were examined. The root and shoot growth as well as chlorophyll a and b contents of R. trisperma grown in sole gold minetailing at 100% significantly decreased, while at the lower concentration of gold mine tailings, the decrease of the growth performanceswas not significant, or even increased shown in that of 25% of tailing treatment. The treatment of gold mine tailing at 100% alsoinduced lipid peroxidation, indicated by the significant increase in malondialdehyde (MDA) contents in the root as well as the leaves.Histochemical analysis showed that accumulation of Pb occurred both in roots as well as in leaves of R. trisperma treated with 100% oftailings. High-level tailing treatment also induced anatomical alteration in roots as well as leaves of the species. These results indicatedthat gold mine tailings induced oxidative stress in roots and leaves of R. trisperma resulted in growth inhibition.

scholarly journals Gold Mine Tailings: A Potential Source of Silica Sand for Glass Making

Minerals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 448 ◽  
Author(s):  
Uchenna Okereafor ◽  
Mamookho Makhatha ◽  
Lukhanyo Mekuto ◽  
Vuyo Mavumengwana
Keyword(s):  
Mine Tailings ◽  
Potentially Toxic Elements ◽  
Silica Sand ◽  
Mine Wastes ◽  
Gold Mine ◽  
X Ray Diffraction ◽  
X Ray ◽  
Potential Source ◽  
Gold Mine Tailings ◽  
Cadmium Zinc

Mining of minerals such as gold, copper, and platinum has been one of several activities sustaining the economy of South Africa. However, the mining sector has contributed significantly to environmental contamination through the improper disposal of mine tailings which covers vast areas of land. Therefore, this study utilised a vitrification process to manufacture glass from gold mine tailings. X-ray fluorescence was used to determine the chemical composition of the tailings while X-ray diffraction was adopted for the mineralogy. The tailings were of granitic composition enriched in potentially toxic elements such as copper, cadmium, zinc, lead, arsenic, and chromium. A representative sample of gold mine wastes of sandy grain size was used in making the glass. Based on composition, the glass was formulated by adding an average 10.0 mass% of CaCO3 and 5.0 mass% of Na2CO3 to 35.0 mass% of SiO2, which resulted in the production of a green-coloured glass.

Determination and detoxification of cyanide in gold mine tailings: A review

2019 ◽  
Vol 37 (11) ◽  
pp. 1117-1126 ◽  
Author(s):  
Cosmos Anning ◽  
Junxiang Wang ◽  
Ping Chen ◽  
Idermunkh Batmunkh ◽  
Xianjun Lyu
Keyword(s):  
Mine Tailings ◽  
Weak Acid ◽  
Acid Dissociation ◽  
Chemical Compositions ◽  
Gold Mine ◽  
Chemical Methods ◽  
Gold Mine Tailings ◽  
Minerals Processing ◽  
The Impact ◽  
Gold Tailings

Cyanide is among the most toxic chemicals widely employed in the cyanidation process to leach precious minerals, such as gold and silver, by the minerals processing companies worldwide. This present article reviews the determination and detoxification of cyanide found in gold mine tailings. Most of the cyanide remains in the solution or the slurries after the cyanidation process. The cyanide species in the gold tailings are classified as free cyanide, weak acid dissociation, and metallocyanide complexes. Several methods, such as colorimetric, titrimetric, and electrochemical, have been developed to determine cyanide concentrations in gold mine effluents. Application of physical, natural, biological, and chemical methods to detoxify cyanide to a permissible limit (50 mg L−1) can be achieved when the chemical compositions of cyanide (type of species) present in the tailings are known. The levels of cyanide concentration determine the impact it will have on the environment.

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