Temat: GOLD - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Prospects for thiourea as a leaching agent in Colombian gold small-scale mining: a comprehensive review
Autorzy:: Borda, Johana
Torres, Robinson
Powiązania:: https://bibliotekanauki.pl/articles/2201416.pdf
Data publikacji:: 2022
Wydawca:: Główny Instytut Górnictwa
Tematy:: górnictwo
złoto
cyjanek
tiomocznik
mining
gold
cyanide
thiourea
Opis:: Thiourea, as an alternative medium, is one of the most promising leaching agents for gold recovery by its commercial benefits and research challenges associated with performance and environmental impacts. This review article describes the operational conditions for the use of Thiourea vs cyanide, its chemistry, limitations, toxicity factors, environment, and recovery processes. Although thiourea gold extraction processes have not been applied on a large scale due to the instability of the reagent, its potential to overcome the limitations of cyanide is attractive to the process; with pH, potential, oxidant dosage, and temperature control, solubilized gold thiourea species are achieved. These can be recovered from the pregnant leach solution through methods such as activated carbon absorption and adsorption, polyurethane foams, ion exchange, and electrodeposition.
Źródło:: Journal of Sustainable Mining; 2022, 21, 4; 298--308
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Evaluation of the extractive gold process: open-pit mining through exergy analysis
Autorzy:: Velasquez, Hector I.
Orozco Loaiza, Carlos Andres
Hasenstab, Christian
Cano, Natalia A.
Powiązania:: https://bibliotekanauki.pl/articles/1839028.pdf
Data publikacji:: 2020
Wydawca:: Główny Instytut Górnictwa
Tematy:: exergy
exergetic cost
extractive gold process
open-pit mining
silver
gold
egzergia
koszt egzergetyczny
wydobycie złota
wydobycie odkrywkowe
srebro
złoto
Opis:: The Colombian mining sector is characterized by the production of coal, nickel, emeralds, gold, and construction materials. It is considered by the National Development Plan of Colombia 2018-2022 as an economic agent that boosts development in the region and one that requires the strengthening of its policies and environmental liability. Therefore, this paper aims to show the importance of implementing methodologies based on the logic of nature (exergy) that objectively indicate the environmental impact of an extractive gold activity, such as open-pit gold mining. The extractive activity or process to be studied consists of the following stages: topsoil removal by using machinery and explosives to create craters and to access the mineral present in the subsoil; the physical transformation of the extracted material through crushing, grinding, gravimetric separation, flotation, leaching, adsorption, elution, and electrodeposition, along with smelting and casting to obtain gold and silver ingots. Thus, this paper analyzes the exergy performance of each unit process of the open-pit extractive process. The obtained results are used in a sensitivity analysis, which determines the system efficiency, by assuming the increase of gold in the extracted material in the exploitation stage, by using the same supplies and input of the current process. In other cases, the open-pit mining process is analyzed by changing its technologies in the mining process and assuming that this change reduces the inlet ore to 60%, by discarding 40% of material without gold and by reducing supply consumption by 25%. By improving the system efficiency, the exergy destroyed is reduced and the emissions to the environment diminish. Therefore, this method may be implemented as a basic guideline when it comes to decision-making processes in the planning of the extractive processes by integrating the environmental component with gold production.
Źródło:: Journal of Sustainable Mining; 2020, 19, 3; 166-181
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: "Surviving and growing up with illegal status": the analysis of socio-economic household, potential conflict, the environmental damage, and vulnerability of local community to disaster
Autorzy:: Syahnur, Sofyan
Diantimala, Yossi
Powiązania:: https://bibliotekanauki.pl/articles/2073899.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: illegal gold mining
socio-economic
conflict
environmental damage
vulnerable to disaster
artisanal gold mining
small-scale gold mining
nielegalne wydobycie złota
konflikty
szkody w środowisku
podatność na katastrofy
rzemieślnicze wydobycie złota
wydobycie złota na małą skalę
Opis:: This study aims to analyze, from social-economics and environmental perspectives, how illegal gold mining survives and grows with its illegal status. Generally, illegal mining has a positive impact on the socio-economy of all parties involved. However, mining activities cause environmental damage and pollution so that the local community is vulnerable to disaster and potential conflict. This research was conducted at an illegal mining site in Aceh, the western province of Indonesia. To describe the primary data, it employs a descriptive qualitative method. The purposive sampling method is used to select key informants. The results show an increasing income of all stakeholders involved. To minimize environmental damage and pollution, illegal mining uses a very simple - but very environmentally friendly-tool, „Asbhuk”, which does not harm the sustainability of the natural environment, especially the use of wells and mountain springs. Nevertheless, natural disasters often occur in the mining area, such as overflowing rivers and landslides caused by heavy rainfall. It is a negative impact from changes in the structure of mining land, forest encroachment, and the expansion of the river. There is no significant conflict between direct and indirect parties engaged in illegal mining activities. The direct parties desire this mining activity to be conducted by artisanal and small groups.
Źródło:: Journal of Sustainable Mining; 2021, 20, 3; 157--177
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Socio-ecological analysis of artisanal gold mining in West Africa: a case study of Ghana
Autorzy:: Takyi, Richard
Hassan, Rasha
El Mahrad, Badr
Adade, Richard
Powiązania:: https://bibliotekanauki.pl/articles/2073904.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: artisanal mining
environmental assessment
management
gold
Ghana
górnictwo rzemieślnicze
ocena środowiskowa
zarządzanie
złoto
Opis:: The surge in artisanal gold mining (AGM) activities and the associated environmental impact in Ghana have elicited several stakeholders' attempts to curb the problem. However, due to little understanding of the underlying issues, these efforts have been ineffective. This study aims to use a socio-ecological framework to analyze drivers of AGM activities, the environmental pressures, the state change, their impact on human welfare, and the management response as measures (DAPSI(W)R(M)) to the problem. Evaluate AGM's impact on Ghana's ability to achieve the United Nations Sustainable Development Goals (SDGs). Data were collected from relevant literature on the subject and analyzed with the DAPSI(W) R(M) framework. Esteem needs, food, acceptance and friendship, and self-actualization are the main drivers of AGM activities leading to environmental pressures, including abrasion, extraction of living and non-living resources, the introduction of non-synthetic compounds, among others. State changes of the environment resulting from the pressures generated by human activities were changes in the land and forest cover (1.13%), topography (hills turned into flatland and undulating), and biota. Due to the state in the environment, water quality and availability, agriculture food production, fish yield, food safety, spiritual and cultural loss, death, injury, and health of gold miners and other stakeholders have been affected.
Źródło:: Journal of Sustainable Mining; 2021, 20, 3; 206--219
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Environmental, health and safety intricacies of artisanal mining in the gold-rich landscapes of Karamoja, north-eastern Uganda
Autorzy:: Serwajja, Eria
Mukwaya, Paul Isolo
Powiązania:: https://bibliotekanauki.pl/articles/1839058.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: artisanal mining
mercury
gold
health and safety
environment
Uganda
górnictwo rzemieślnicze
rtęć
złoto
BHP
środowisko
Opis:: Artisanal small-scale gold mining presents numerous opportunities for Uganda's rural poor. However, it also poses serious environmental, health and safety challenges. A suite of data collection methods including interviews, focus groups discussions, water and soils sampling were used to examine the perceptions of miners on the status, prevalence and extent of mercury use in artisanal gold mining, mercury transit routes and toxicity levels of soils and water in Karamoja sub-region. It also explores the health, safety and environmental implications of artisanal small-scale gold mining in the sub-region. The findings show that trade and access to mercury is widespread; although trade in, access to and its use is highly secretive. Traders access mercury through a number of ways including smuggling across the porous borderline and formal, but covert, importation. Miners then discreetly access it through undercover sales in jewellery shops and in affluent gated communities in Uganda's capital, Kampala. Soil and water samples showed mercury levels that exceeded the minimum acceptable limits of 0.03 mg/kg and 0.006 mg/l respectively. Further, artisanal small-scale gold mining is associated with massive land clearances and landscape deformations. It has invariably scarred the countryside with piles of waste and uncovered pits that are a source of accidents and ideal breeding grounds for vectors.
Źródło:: Journal of Sustainable Mining; 2021, 20, 2; 90-108
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Sustainable development in Ghana's gold mines: Clarifying the stakeholder's perspective
Autorzy:: Dery Tuokuua, Francis Xavier
Kpinpuo, Stephen Debar
Hinson, Robert Ebo
Powiązania:: https://bibliotekanauki.pl/articles/92098.pdf
Data publikacji:: 2019
Wydawca:: Główny Instytut Górnictwa
Tematy:: human capital
sustainable development
gold mining
stakeholders
Ghana
kapitał Ludzki
rozwój zrównoważony
wydobycie złota
interesariusze
Opis:: Using semi-structured interviews and focus group discussions (FGDs), this study examined critical stakeholder's perceptions, experiences and competence in assuring the sustainable management of Ghana's major gold mines. The investigation was inspired by a synthesis of the United Nation's Sustainable Development Goals (SDGs) adopted by the global community in September 2015; it places human resource capacity at the center of a sustainability struggle between local and international businesses. The findings of this study encompass two opposing but interesting perspectives. On the one hand, the study showed that sustainable development is understood differently by stakeholders within the gold mining sector in Ghana, which is why gold mining companies employ different approaches in their pursuit of sustainability objectives. On the other hand, the study revealed that, as mining activities are similar across different mining companies, common understanding and operation of sustainable development in the country's gold mines is a more practical approach to sustaining mining operations. This study further revealed that to facilitate the effective implementation of sustainable development within Ghana's gold mines and to ensure its alignment with SDGs, a regulatory framework is required and this should be developed based on the input of stakeholders.
Źródło:: Journal of Sustainable Mining; 2019, 18, 2; 77-84
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Exergy life cycle assessment indicators in Colombian gold mining sector
Autorzy:: Cano, Natalia A.
Hasenstab, Christian
Velásquez, Héctor I.
Powiązania:: https://bibliotekanauki.pl/articles/1839025.pdf
Data publikacji:: 2020
Wydawca:: Główny Instytut Górnictwa
Tematy:: exergy analysis
life cycle assessment
mining process
gold extraction sustainability
analiza egzergii
ocena cyklu życia
proces wydobywczy
zrównoważony rozwój wydobycia złota
Opis:: Thermodynamic methods, such as exergy analysis allow the assessment of environmental load (environmental impacts), by calculating the entropy generated or exergy destroyed due to the use of renewable and non-renewable resources along the entire production chain. In this research, exergy analysis will be approached as an extension of LCA to ExLCA (Exergy Life Cycle Assessment), as complementary tools, for sustainability assessment of two gold mining systems in Colombia: open-pit and alluvial mining. It is quantified exergy life cycle efficiencies; Cumulative Energy/ Exergy Demand, by distinguishing between renewable and non-renewable resources used in the process. The energy contained in renewable and non-renewable resources, interpreted as a measure of its utility potential, and which inefficient use generates waste streams with an exergy content that may be a measure of its potential to cause environmental damage. For open-pit mining 53% of exergy consumed comes from fossil energy, and 26% of energetic use of water, while in alluvial mining, 94% of exergy flow comes from water as a resource used within process activities. In order to reduce the environmental impact associated with gold generation life cycle described in this study, four strategies should be implemented; 1) Increasing efficiency, by reducing the exergy required in tails and extraction stages in open-pit mining process and, casting and molding stage in alluvial mining process, where large exergy supplies are required. 2) Increasing efficiency through the reduction of exergy emissions and residues in casting and molding stage in alluvial mining, and stripping stage in open-pit mining. 3) Using external exergy resources, such as renewable resources from nature (solar, wind, hydraulic). 4) Applying the concept of circular economy, which implies the reduction in consumption of resources.
Źródło:: Journal of Sustainable Mining; 2020, 19, 3; 151-165
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "GOLD" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język