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Tytuł:
Removal of heavy metals from groundwater affected by acid mine drainage
Autorzy:
Suponik, T.
Blanco, M.
Powiązania:
https://bibliotekanauki.pl/articles/110087.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
coal mine waste dumps
acid mine drainage
groundwater
PRB technology
metals
zero-valent iron
Opis:
Batch tests have been used to assess the level of the removal of metals (copper, nickel, cobalt, zinc, and chromium, in cationic and in anionic forms) from water at low pH values affected by acid mine drainage. The predominant processes which result in the removal with the use of zero-valent iron (Fe0) in Permeable Reactive Barrier Technology were evaluated. The most probable processes for each metal have been presented in drawings. There are: reductive precipitation leading to the metallic form, co-precipitation mainly with iron in the form of oxides and/or hydroxides and adsorption on the surface of iron corrosion products or on the surface of zero-valent iron.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 1; 359-372
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active Physical Remediation of Acid Mine Drainage: Technologies Review and Perspectives
Autorzy:
Mulopo, Jean
Powiązania:
https://bibliotekanauki.pl/articles/2105273.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
ion-exchange
acid mine drainage
electrochemical
adsorption
membrane process
active physical treatment
Opis:
The successful acid mine drainage (AMD) treatment needs site-specific installation and implementation, as well as the deployment of technology that is compatible with the pollutants contained in the AMD. If key by-products of the AMD can be recovered, the financial sustainability of the AMD remediation method may be greatly improved. Additional research into novel and innovative solutions is necessary to advance in this direction. To accomplish this, it is necessary to have a complete awareness of current remediation technologies that are available and accessible. Active physical treatment methods such as ion exchange, adsorption, electrochemistry, and membrane techniques were examined in this article. Membrane technology excels in terms of ease of use, versatility, and environmental effect but produces brine streams the management of which remains vital for future adoption of the technology. Liquid membranes (LM), Micellar Enhanced Ultra-Filtration (MEUF), and Polyelectrolyte Enhanced Ultra-Filtration (PEUF) are all innovative membrane technologies that may provide some possibilities for metal recovery from chemical sludge and/or brine streams. Electrochemical technologies are considered an attractive alternative for AMD treatment, because they require only electricity as a consumable and can treat AMD to high standards by removing metals via (co)precipitation and sulfate via ionic migration (when an anion-exchange membrane is used in the configuration), while producing significantly less sludge. However, the accepted shortcomings include membrane/electrode fouling produced by (co)precipitates on the active surfaces necessary for the process, a lack of understanding regarding the effective scaling up to industrial scale, and the relatively expensive capital expenditure (CAPEX) required. The removal of heavy metals from AMD effluents by adsorption has a number of technical and environmental benefits, including high efficiency, and environmental friendliness. Despite its benefits, this technique has certain hurdles, such as the production process for low-cost adsorbents.
Źródło:
Journal of Ecological Engineering; 2022, 23, 6; 148--163
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biogenic catalysis in sulphide minerals weathering processes and acid mine drainage genesis
Autorzy:
Kušnierová, Mária
Praščáková, Mária
Nowak, Anna
Gorazda, Katarzyna
Wzorek, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1039326.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
sulphide minerals
weathering
acid mine drainage
biotransformation
Acidithiobacillus ferrooxidans
Opis:
Bioleaching and biogenesis are the main outputs from a large group of environmental processes participating in the natural material cycle, used in raw materials processing. Bio-oxidation reactions are the main basis for bioleaching procedures, often participating in parallel leaching processes. During the leaching processes of polycomponent sulphide substrates, the factor of process selection also plays an important role, being in direct relation to the electric properties and galvanic effect occurring between the individual components of the leaching substrate. This work gives a summary of the results of a research focused on the possibilities of using biotechnological procedures for treatment of Slovak sulphide ores. The object of the research is extraction of valuable metals, undesirable admixtures and degradation of crystal lattice of sulphides for subsequent chemical leaching processing of precious metals. The results of experiments on the existence of biogenic processes in situ on waste dumps from exploitation containing residual sulphides are also presented. The processes result in acid mine drainage water generation. These waters are strongly mineralised (over 48 g/L) and of low pH; that is why they are very caustic. The arsenic content (2.558 mg/L) in outflowing waters from old mines is high and over the limits set by the law.
Źródło:
Acta Biochimica Polonica; 2014, 61, 1; 33-39
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pyrite oxidation inhibition by hydrophobic films for acid mine drainage control at the source
Autorzy:
Wang, Shuncai
Zhao, Yue
Li, Shuang
Powiązania:
https://bibliotekanauki.pl/articles/110200.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
hydrophobic film
pyrite
suppression
linoleic acid
acid mine drainage
Opis:
Acid mine drainage (AMD), which is also known as acid rock drainage (ARD), can cause serious environmental pollution, especially for surrounding aquatic and terrestrial ecosystems due toits low pH, high metal and sulfate concentration. Acid mine drainage is an urgent environmental problem for the worldwide ore mining industry. In this paper, we demonstrated that hydrophobic films can inhibit the oxidation of pyrite-bearing tailings to achieve the control of at-source AMD. The results of chemical leaching testing showed that the hydrophobic films formed by linoleic acid can suppress the oxidation of pyrite-bearing tailings and reduce the AMD production. In addition, the presence of hydrophobic films of linoleic acid on the surface of pyrite-bearing tailings was confirmed by the results from Fourier transform infrared (FTIR) analyses and scanning electron microscopy with energy dispersive spectrometry (SEM / EDS).
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1132-1140
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Employment of Ca2+-rich MgO nanoparticles for effective treatment of real acid mine drainage
Autorzy:
Mothetha, Matome
Kebede, Kefeni
Masindi, Vhahangwele
Msagati, Titus
Powiązania:
https://bibliotekanauki.pl/articles/24201027.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dewatering of mine
acid mine waters
acid mine drainage
AMD
PHREEQC
odwadnianie kopalni
kwaśne wody kopalniane
Opis:
The efficacy of Ca2+-rich MgO nanoparticles for the effective treatment of real acid mine drainage (AMD) was evaluated. The optimized parameters include the feedstock dosage and contact time. The experimental results were underpinned using state-of-the-art analytical techniques and instruments such as FTIR, HR-FIB/SEM, EDS, XRF, and XRD. The pH REDOX equilibrium (in C language) (PHREEQC) model was also employed to complement experimental results. Optimum conditions were observed to be 45–60 min of mixing time, ≥10 000 mg/dm3 of feedstock dosage, i.e., Ca2+-rich MgO nanoparticles, and ambient temperature and pH. The metal content (Fe3+, Mn2+, Cr2+, Cu2+, Ni2+, Pb2+, Al3+, and Zn2+) embedded in AMD matrices was practically removed (≥99% removal efficacies) whilst the sulfate was also attenuated humongous (≥40%). The PHREEQC predicted metals to exist as multi-valent including carbonates and other chemical complexes. Chemical species in real AMD were predicted to precipitate as metals hydroxides, (oxy)-hydroxides, carbonates, and (oxy)-hydro-sulfates. Henceforth, the use of Ca2+-rich MgO nanoparticles was proved to be effective in the treatment of AMD from coal mining activities. However, a polishing technology will be required to further remove residual sulfates. This could be pursued to recover sulfate in valuable form and then reclaim drinking water for domestic purposes or other defined uses (end-use). This will then be the most effective closed-loop approach in the management of AMD under the circular economy (CE) concept.
Źródło:
Environment Protection Engineering; 2023, 49, 1; 25--44
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of electro-activation and eggshell powder on the neutralization of acid mine drainage
Autorzy:
Kastyuchik, A.
Karam, A.
Aïder, M.
Powiązania:
https://bibliotekanauki.pl/articles/91971.pdf
Data publikacji:
2017
Wydawca:
Główny Instytut Górnictwa
Tematy:
acid mine drainage
electro-activation
neutralization
effectiveness
kwaśny odciek kopalniany
elektroaktywacja
neutralizacja
skuteczność
Opis:
Acid mine drainage (AMD) production by sulfide mine tailing (SMT) is a major environmental preoccupation because it can degrade water surface quality on account of its strong acidity and advanced content of sulfide, iron (Fe) and other metals and metalloids. Acid neutralization and the precipitation of metals present in AMD were carried out by electro-activation with ion-exchange membranes, which is based on the self-generation of necessary conditions for acid neutralization and metal precipitation. The treatment of SMT was carried out by using an electro-activation cell generated alkaline solution in the cathode compartment. After 60 min of electro-activation, a pHcatholyte of 7.9-9.6, depending on the experimental conditions, was obtained. The absence of Fe and other trace metal ions in the catholyte provide evidence that the electro-activation of SMT promotes the precipitation of insoluble trace metals in the cathode compartment. This approach can be applied to real conditions in combination with a pretreatment of SMT neutralization, inwhich biological calcareous amendments are available. Finally, the electro-activation technology of acid mine drainage may be a feasible, cost-effective approach for SMT neutralization because it focuses on sustainable development.
Źródło:
Journal of Sustainable Mining; 2017, 16, 3; 73-82
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Forming of Acid Mine Drainage Based on Characteristics of Coal Mining, East Kalimantan, Indonesia
Autorzy:
Widayati Amy, Sri
Dani, Umar
Nu'man, Harits
Muslim, Dicky
Nasruddin, Dudi
Nuryahya, Himawan
Nurhasan, Rully
Agustin, Daryl Sarah
Powiązania:
https://bibliotekanauki.pl/articles/27323828.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
coal
sulfur
acid mine drainage
NAPP
net acid production potential
Opis:
As one of the world’s coal producers, Indonesia continues to increase its coal production. The purpose of this study is to identify and analyze the characteristics of coal that has the potential to produce acid mine drainage. The research method is coal mapping and zoning based on formation, observation, and description of coal characteristics, coal sampling, ultimate and proximate testing, and analysis. The results of the study describe the characteristics of coal related to distribution in the early stages of evaluating the potential for acid mine formation, besides that it can be used as a basis for classifying the potential for acid mine drainage which has a high enough total sulfur based on the results of testing on 15 samples. To prevent the reaction to acid mine drainage, it can be based on the geochemical characteristics of coal by constructing a mine reservoir or making water drainage in a mine that is not close to the stockpile, because there is a possibility that water has the potential to form acid mine drainage (AMD) when it comes in contact with coal potential. So that coal does not have the potential to be a source of acid mine drainage.
Źródło:
Journal of Ecological Engineering; 2023, 24, 7; 301--310
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Schwertmannite precipitated from acid mine drainage in theWestern Sudetes (SW Poland) and its arsenate sorption capacity
Autorzy:
Parafiniuk, J.
Siuda, R.
Powiązania:
https://bibliotekanauki.pl/articles/2059129.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Sudetes
schwertmannite
ochre
acid mine drainage
arsenate sorption
Opis:
This paper contains XRD, Mössbauer and IR spectroscopy, chemical composition and thermal analysis results for the mineral schwertmannite present in the weathering zone developed in two abandoned sulphide mines in the Sudetes (SW Poland). In Wieściszowice a pyrite deposit was exploited, and in Radzimowice the deposit consisted of polymetallic mineralization with predominant arsenopyrite. In both localizations schwertmannite is developed as dripstones in underground workings and loose sediments precipitating from the acid mine drainage (AMD) waters. Schwertmannite forms tiny, needle-like crystals 2–3 m in size, usually grouped in botryoidal aggregations. The chemical composition of schwertmannite from Wieściszowice is typical for this mineral, and in Radzimowice the mineral contains up to 5.20 wt. % of As2O5. Due to highly developed specific surface and structural features, schwertmannite has the strongest sorption capabilities among the components of ochres, and takes up the largest amounts of arsenate oxyanion fromAMD, as well as considerable amounts of phosphates and heavymetals. About 71-87% of arsenate is sorbed on to the surface of the schwertmannite crystals and may readily be released into solution, 12–30% is bound into the structure of the mineral, and about 1% is an admixture of insoluble ferric arsenates.
Źródło:
Geological Quarterly; 2006, 50, 4; 475-486
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of lead ions from acid aqueous solutions and acid mine drainage using zeolite bearing tuff
Autorzy:
Zendelska, A.
Golomeova, M.
Golomeov, B.
Krstev, B.
Powiązania:
https://bibliotekanauki.pl/articles/204844.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adsorption
acid mine drainage
zeolite bearing tuff
lead ions
equilibrium studies
Sasa mine
Opis:
The adsorption of lead ions onto a zeolite bearing tuff (stilbite) from synthetic acid aqueous solution and acid mine drainage taken from Sasa mine, Macedonia, is elaborated in this paper. The results present that adsorption occurs efficiently in both of cases. The physical and chemical properties of the used natural material, zeolite bearing tuff, are characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy. The concentration of metal ions in solution before and after treatment is obtained by AES-ICP. The effectivity of zeolite bearing tuff is determined through a series of experiments under batch conditions from single ion solutions, whereby the main parameters are the effects of initial pH of solution, mass of adsorbent, initial metal concentration in solution, contacting time and competing cations. The maximum capacity of zeolite bearing tuff for removal of lead ions from solution is determined by equilibrium studies. The experimental obtained data are fitted with Freundlich and Langmuir adsorption models. The experimental data are better fitted with Langmuir adsorption isotherm. Zeolite bearing tuff is effective adsorbent for treating acid mine drainage. The results showed that 99% of lead ions are removed from acid mine drainage, i.e. the concentration of lead ions from 0.329 mg/dm3 decrease to 0.002 mg/dm3. The pH value of acid mine drainage from 3.90 after treatment with zeolite bearing tuff increases to 5.36.
Źródło:
Archives of Environmental Protection; 2018, 44, 1; 87-96
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Treatment of Acid Mine Drainage in a Bioelectrochemical System, Based on an Anodic Microbial Sulfate Reduction
Autorzy:
Angelov, Anatoliy
Bratkova, Svetlana
Ivanov, Rosen
Velichkova, Polina
Powiązania:
https://bibliotekanauki.pl/articles/27323817.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
BES
bioelectrochemical system
MFC
microbial fuel cell
MEC
microbial electrolysis cell
ethanol stillage
microbial sulfate reduction
acid mine drainage
heavy metals
sulphate
Opis:
The possibilities of simultaneous removal of sulfates and heavy metals (Cu, Ni, Zn) from acid mine drainage have been investigated in two-section bioelectrochemical system (BES). The used BES is based on the microbial sulfate reduction (MSR) process in the anode zone and abiotic reduction processes in the cathodic zone. In the present study, the model acid mine drainage with high sulfate (around 4.5 g/l) and heavy metals (Cu2+, Ni2+ and Zn2+) content was performed. As a separator in the laboratory, BES used an anionic exchange membrane (AEM), and for electron donor in the process of microbial sulfate reduction in the bioanode zone – waste ethanol stillage from the distillery industry was employed. In this study, the possibility of sulfates removal from the cathodic zone was established by their forced migration through AEM to the anode zone. Simultaneously, as a result of the MSR process, the sulfate ions passed through AEM are reduced to H2S in the anode zone. The produced H2S, having its role as a mediator in electron transfer, is oxidized on the anode surface to S0 and other forms of sulfur. The applicability of waste ethanol stillage as a cheap and affordable organic substrate for the MSR process has also been established. Heavy metals (Cu2+, Ni2+ and Zn2+) occur in the cathode chamber of BES in different degrees of the removal. As a microbial fuel cell (MFC) operating for 120 hours, the reduction rate of Cu2+ reaches 94.6% (in waste ethanol stillage) and 98.6% (in the case of Postgate culture medium). On the other hand, in terms of Ni2+ and Zn2+, no significant decrease in their concentrations in the liquid phase is found. In the case of microbial electrolysis cell (MEC) mode reduction of Cu2+– 99.9%, Ni2+– 65.9% and Zn2+– 64.0% was achieved. For 96 hours, the removal of sulfates in MEC mode reached 69.9% in comparison with MFC mode – 35.2%.
Źródło:
Journal of Ecological Engineering; 2023, 24, 7; 175--186
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating acid mine drainage potential and alteration properties of Zn-Pb wastes from Görgü (Malatya, Türkiye) region
Autorzy:
Sis, Hikmet
Başaran, Basri
Powiązania:
https://bibliotekanauki.pl/articles/24148654.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
degradation of waste ore
acid mine drainage
static test
pyrite
Opis:
Acid mine drainage (AMD) is one of the main causes of environmental threats resulting from mining activities, yet efficient characterization and prediction of AMD potential of wastes play an important role in preventing AMD. In this study, the chemical and mineralogical properties of fresh waste samples, collected from waste ponds of the Görgü (Malatya) zinc-lead ore processing plant, were determined and the results were used to explain its AMD potential. Alteration properties of the wastes in water was investigated by monitoring certain properties of the prepared suspension with respect time. Additionally, pyrite concentrate particles were added into the suspensions at certain proportions to evaluate its effect on the AMD generation and alteration. Analysis and test results showed that the raw waste was rich in carbonate and poor in pyritic sulfur, and hence did not have the AMD generation potential. The pH, electrical conductivity, and metal ions concentrations of the suspension medium were determined at regular intervals, and obtained data were found very beneficial to explain the time-dependent behavior of waste in water. After the depletion of liquid in the suspension, the remained solid residuals were chemically and mineralogically analyzed to compare with raw waste. It was concluded that sufficient aeration and stirring of suspension is required for noticeable alteration of the waste.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 169357
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological removal of anorganic pollutants from acid mine drainage
Biologiczne oczyszczanie nieorganicznych zanieczyszczeń dzięki kwaśnemu drenażowi kopalni
Autorzy:
Macingova, E.
Luptakova, A.
Prascakova, M.
Powiązania:
https://bibliotekanauki.pl/articles/971064.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
kwaśny drenaż kopalni
bakterie redukujące siarkę
biogeniczne siarczany
odzysk metali ciężkich
acid mine drainage
sulphate-reducing bacteria (SRB)
biogenic sulphide
heavy metals recovery
Opis:
Acid Mine Drainage (AMD) is one of the significant environmental and financial liabilities of the mining industry. Currently active mines, as well as mines that have been out of production for years, produce acidic waters with high concentration of sulphates and heavy metals. Treatment methods used to mitigate impact of AMD on the environment are focused on neutralizing, stabilizing and removing pollutants through various physical, chemical and biological processes. This paper reports the results of anorganic pollutants removal from AMD using sulphate reducing bacteria (SRB). Hydrogen sulphide produced by SRB for recovery of Cu and Zn has been used in the course of selective sequential precipitation process (SSP). In the next stage sulphates were removed from AMD by the biological anaerobic reduction. Thus, by this method removing of metals and sulphates has been achieved in successive discrete steps. The experiments were performed at laboratory condition using water collected from the site of the AMD outflow at the shaft Pech from the enclosed and flooded Smolnik sulphidic deposit (Slovakia).
Kwaśny drenaż kopalni (skr. AMD) to jedno z największych odpowiedzialności środowiskowych i finansowych jakie spoczywają na przemyśle kopalnianym. Zarówno obecnie działające kopalnie, jak i te niedziałające od lat, produkują wodę o dużym stężeniu siarczanu i metali ciężkich. Metody mające na celu złagodzenie działania AMD na środowisko skupiają się na neutralizacji, stabilizacji i eliminacji zanieczyszczeń przez liczne procesy fizyczne, chemiczne i biologiczne. Niniejsza praca przedstawia wyniki z oczyszczania nieorganicznych zanieczyszczeń przy użyciu bakterii redukującej siarczany (skr. RB). Produkowany przez nią siarkowodór, dla uzupełnienia miedzi i cynku, został użyty podczas sekwencyjnego losowego procesu wytrącania (SSP). Następnie usunięto siarczany z AMD dzięki anaerobicznej redukcji. Dzięki tej metodzie udało się usunąć metale i siarczany w następnych dyskretnych etapach. Badania zostały przeprowadzone w warunkach laboratoryjnych na wodzie uzyskanej z odpływu AMD w wale kopalnianym Pech z zamkniętego i zalanego depozytu Smolniksulphidic (Słowacja).
Źródło:
Inżynieria Mineralna; 2015, R. 16, nr 1, 1; 13-18
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental protection against acid mine drainage (AMD) testing of sulphide mining waste enrichment of the Chaabet-El-Hamra mine (Algeria)
Autorzy:
Benabbes, Lamia
Bounouala, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/1402325.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
mining waste
sulphide ores
AMD
acid mine drainage
characterization
environmental desulfurization
flotation
environment
Opis:
The mining waste from the Chaabet-El-Hamra mine contains sulfides such as pyrite (FeS2), galena (PbS) and chalcopyrite (CuFeS2) Which pose a threat to the environment. Sulphide minerals under the effect of oxygen and in the presence of water cause a phenomenon of acid mine drainage. Samples taken at the site of the sulphide mine waste at the Chaabet El Hamra mine and subsequently subjected to chemical analyzes offered an average sulfur content of 9%. X-ray diffractometer analyzes confirm the presence of a considerable inclusion of pyrite containing secondary minerals of sphalerite, and galena. To do this, the tests were directed to an environmental desulphurization process by flotation of the pyriterich fraction with depression of the low sulfur mineralogical matrix containing heavy metals of zinc and lead.
Źródło:
Mining Science; 2020, 27; 323-335
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A lab study of mineral scale buildup on lined and traditional PE water pipes for acid mine drainage treatment applications
Autorzy:
Pezzuto, Amanda
Sarver, Emily
Powiązania:
https://bibliotekanauki.pl/articles/1839046.pdf
Data publikacji:
2020
Wydawca:
Główny Instytut Górnictwa
Tematy:
mineral scale
water conveyance
water pipe
acid mine drainage
kamień mineralny
transport wody
wodociąg
kwaśny drenaż kopalniany
Opis:
Plastic, especially polyethylene (PE), pipe material is increasingly used in mining applications due to its inert nature, flexibility, low density, and low cost. Though resistant to chemical corrosion, it is susceptible to abrasion. To combat this problem, an abrasion-resistant liner is in development. However, it is not yet known how the liner will perform with regards to other common problems that affect pipe systems, such as mineral scale buildup. In mining applications, scale buildup occurs due to the very high contents of suspended and dissolved solids in water or slurry. For example, in systems transporting raw or treated acid mine drainage (AMD), scale can form on pipe surfaces due to sedimentation or the diffusion of particles onto the surface, or precipitation of solids directly onto the surface. In this study, pipe-loop experiments were conducted in the laboratory under three idealized AMD treatment scenarios (i.e., untreated, passively treated and actively treated) to compare mineral scale buildup on traditional versus lined PE pipe materials.
Źródło:
Journal of Sustainable Mining; 2020, 19, 1; 33-45
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recovery of Iron from Acid Mine Drainage in the Form of Oxides
Odzyskiwanie żelaza w formie tlenków z kwaśnego drenowania kopalni
Autorzy:
Macingova, E.
Luptakova, A.
Powiązania:
https://bibliotekanauki.pl/articles/318248.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
acid mine drainage
iron oxide recovery
structural and mineralogical analysis
kwaśny odciek kopalniany
odzysk tlenku żelaza
analiza strukturalna i mineralogiczna
Opis:
Acid mine drainage (AMD) typical by low pH, high concentration of sulphates and different heavy metals is one of the major sources of environmental damage in mining industry. Treatment methods to address AMD are focused on neutralizing, stabilizing and removing pollutants through various physical, chemical and biological processes. However this type of mining influenced water should be considered not only as serious environmental problem, but also as an important resource due to the universal high metal demand and ambition of potential reuse of metals recovered from AMD. The aim of this work was to recovery of iron in the form of oxides from AMD drained from enclosed and flooded Smolnik sulphidic deposit (Slovakia). The iron was removed from AMD in two steps to very low levels that meet required water quality criteria. The ferrous iron present in AMD was oxidized using hydrogen peroxide. In this stage decreasing of pH value and partial iron precipitation were observed. The follow neutralization using sodium hydroxide resulted in total iron removing by precipitation. The obtained solids were identified as a schwetmannite. The iron oxides were produced by thermal decomposition of precipitates. The morphology of acquired intermediates was studied by cryo-scanning electron microscopy (cryo-SEM) and the Fourier transform infrared spectroscopy (FTIR) was applied to characterization of their composition. Energy dispersive X-ray spectroscopy (EDX) was used for qualitative and quantitative analysis of intermediates and products. The X-ray powder diffraction (XRPD) was performed for the mineralogical analysis of the iron precipitates before and after the differential (DTA) and thermogravimetric (DTG) experiment.
Kwaśne drenowanie kopalni (AMD – Acid Mine Drainage) typowe dla niskiego pH, wysokiego stężenia siarczanów i innych metali ciężkich jest jednym z głównych źródeł szkód środowiskowych w przemyśle wydobywczym. Metody obróbki adresowane dla AMD są skupione na neutralizowaniu, stabilizacji i usuwaniu zanieczyszczeń za pomocą różnych procesów fizycznych, chemicznych i biologicznych. Jednakże ten typ wydobycia, który wpływa niekorzystnie na wodę powinien być uważany nie tylko za poważny problem środowiskowy, a także za ważne źródło zasobów, w związku z powszechnym zapotrzebowaniem na metale i ambicję do potencjalnego powtórnego użycia metali odzyskanych z AMD. Celem tej pracy jest odzysk żelaza w formie tlenków z AMD z zamkniętego i zalanego depozytu Smolniksulphidic (Słowacja). Żelazo zostało usunięte z AMD w dwóch krokach, aż do uzyskania bardzo niskiego poziomu aby zaspokoić kryteria jakości wody. Żelazo (II) obecne w AMD zostało utlenione z użyciem nadtlenku wodoru. Na tym etapie zaobserwowano malejącą wartość pH i częściowe wytrącanie się żelaza. Następująca później neutralizacja z użyciem wodorotlenku sodu skutkowała całkowitym usunięciem żelaza w skutek wytrącania. Uzyskane ciała stałe zostały zidentyfikowane jako schwetmannit. Tlenki żelaza zostały wytworzone w procesie rozkładu termicznego wytrąconego osadu. Morfologia uzyskanych półproduktów została zbadania za pomocą krio-skaningowego mikroskopu elektronowego (krio-SEM) oraz w celu zbadania ich składu zastosowana została spektroskopia w podczerwieni z transformatą Fouriera (FTIR). Spektroskopia z dyspersją energii promieniowania rentgenowskiego (EDX) została zastosowana w analizie jakościowej i ilościowej półproduktów i produktów. Dyfrakcja proszkowa promieniowania rentgenowskiego została użyta do analizy mineralogicznej osadów żelaza przed i po eksperymentach różnicowych (DTA) i termo grawimetrycznych (DTG).
Źródło:
Inżynieria Mineralna; 2014, R. 15, nr 2, 2; 193-198
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 34

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