Selective Removal of As(V) Ions from Acid Mine Drainage Using Polymer Inclusion Membranes

Acid mine drainage (AMD) is globally recognized as one of the environmental pollutants of the priority concern due to high concentrations of toxic metals and sulfates. More rigorous environmental legislation requires exploitation of effective technologies to remove toxic metals from contaminated streams. In view of high selectivity, effectiveness, durability, and low energy demands, the separation of toxic metal ions using immobilized membranes with admixed extractants could ameliorate water quality. Cellulose triacetate based polymer inclusion membranes (PIMs), with extractant and plasticizer, were studied for their ability to transport of As(V) ions from synthetic aqueous leachates. The effects of the type and concentration of extractant, plasticizer content, and sulfuric acid concentration in source phase on the arsenic removal efficiency have been assessed. Under the best of applied conditions, PIM with Cyanex 921 as extractant and o-nitrophenyl octyl ether (o-NPOE) as plasticizer showed high repeatability and excellent transport activity for selective removal of As(V) from AMD.

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Uranium Bioleaching from Low Grade Ore

Materials Science Forum ◽

10.4028/www.scientific.net/msf.989.559 ◽

2020 ◽

Vol 989 ◽

pp. 559-563

Author(s):

Ashimkhan T. Kanayev ◽

Khussain Valiyev ◽

Aleksandr Bulaev

Keyword(s):

Sulfuric Acid ◽

Acid Mine Drainage ◽

Mine Drainage ◽

Sulfuric Acid Concentration ◽

Acid Leaching ◽

Leach Solution ◽

Low Grade ◽

Bacterial Cells ◽

Acid Mine

The goal of the present work was to perform bioleaching of uranium from low grade ore from Vostok deposit (Republic of Kazakhstan), which was previously subjected to long-term acid leaching. The ore initially contained from 0.15 to 0.20% of uranium in the form of uraninite, but ore samples used in the study contained about 0.05% of uranium, as it was exhausted during acid leaching, and uranium was partially leached. Representative samples of ore were processed in 1 m columns, leach solutions containing 5, 10, 20 g/L of sulfuric acid and bacterial cells (about 104) were percolated through the ore. Leaching was performed at ambient temperature for 70 days. In one of the percolators, the leaching was performed with leaching solution containing 10 g/L of H2SO4, cells of A. ferrooxidans, and 0.5 g/L of formaldehyde. Leaching with the solution containing 5, 10, and 20 g/L of sulfuric acid made it possible to extract 50, 53, and 58% of uranium. Addition of formaldehyde in leach solution led to the decrease in uranium extraction extent down to 37%. Thus, the results of the present work demonstrated that uranium ore exhausted during long-term acid leaching may be successfully subjected to bioleaching, that allows extracting residual quantities of uranium. Leaching rate of uranium from exhausted ore depended on both sulfuric acid concentration and microbial activity of bacteria isolated from acid mine drainage, formed on uranium deposit. In the same time, acid mine drainage may be used as a source of inoculate, to start bioleaching process.

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Optimization of arsenic removal from an acid mine drainage in an anaerobic membrane bioreactor

Environmental Technology & Innovation ◽

10.1016/j.eti.2020.100712 ◽

2020 ◽

Vol 18 ◽

pp. 100712 ◽

Cited By ~ 1

Author(s):

Ece Yigit ◽

Adem Yurtsever ◽

Senem Teksoy Basaran ◽

Erkan Sahinkaya

Keyword(s):

Acid Mine Drainage ◽

Membrane Bioreactor ◽

Arsenic Removal ◽

Mine Drainage ◽

Anaerobic Membrane Bioreactor ◽

Acid Mine

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Arsenic removal by oxidizing bacteria in a heavily arsenic-contaminated acid mine drainage system (Carnoulès, France)

Geological Society London Special Publications ◽

10.1144/gsl.sp.2002.198.01.17 ◽

2002 ◽

Vol 198 (1) ◽

pp. 267-274 ◽

Cited By ~ 3

Author(s):

Marc Leblanc ◽

Corinne Casiot ◽

Françoise Elbaz-Poulichet ◽

Christian Personné

Keyword(s):

Acid Mine Drainage ◽

Arsenic Removal ◽

Mine Drainage ◽

Drainage System ◽

Acid Mine

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ACCUMULATION OF ECO-TOXIC METALS IN POTATO PLANTS UNDER GREENHOUSE CONDITIONS IRRIGATED WITH SYNTHETIC ACID MINE DRAINAGE IMPACTED WATER AND HEALTH RISK EVALUATION

Journal American Society of Mining and Reclamation ◽

10.21000/jasmr10010337 ◽

2010 ◽

Vol 2010 (1) ◽

pp. 337-364

Author(s):

Alan E. Garrido ◽

William H. Strosnider ◽

Robert W. Nairn

Keyword(s):

Acid Mine Drainage ◽

Health Risk ◽

Toxic Metals ◽

Risk Evaluation ◽

Mine Drainage ◽

Potato Plants ◽

Acid Mine ◽

Synthetic Acid ◽

Health Risk Evaluation

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Review of Remediation Solutions for Acid Mine Drainage Using the Modified Hill Framework

Sustainability ◽

10.3390/su13158118 ◽

2021 ◽

Vol 13 (15) ◽

pp. 8118

Author(s):

Sandisiwe Khanyisa Thisani ◽

Daramy Vandi Von Kallon ◽

Patrick Byrne

Keyword(s):

Acid Mine Drainage ◽

Mine Drainage ◽

Toxic Metal ◽

Water Remediation ◽

Acid Mine ◽

Operational Costs ◽

Safe Management ◽

Additional Process ◽

Further Development ◽

By Products

This paper reviews the Acid Mine Drainage (AMD) remediation potential and operational costs of twelve existing AMD remediation methods against Class 0 and Class I AMD geochemical characteristics as defined in the Modified Hill Framework. Of the twelve remediation options reviewed in this study, eleven required additional process steps either for further treatment to achieve the discharge limits or for the safe management of hazardous waste by-products. Chemical desalination showed the greatest potential with high quality treated water and operational costs between USD 0.25 and USD 0.75 per cubic meter treated. The management of the toxic metal and sulphide by-products remains a key challenge that requires further research for sustainable mine water remediation. Further development of end-to-end methods suitable for Class 0 AMD with economical operational costs is recommended in order to effectively address the ongoing environmental challenges posed by AMD globally.

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New microbiological strategies that enable the selective recovery and recycling of metals from acid mine drainage and mine process waters

Mineralogical Magazine ◽

10.1180/minmag.2012.076.7.04 ◽

2012 ◽

Vol 76 (7) ◽

pp. 2683-2692 ◽

Cited By ~ 17

Author(s):

I. Ňancucheo ◽

S. Hedrich ◽

D. B. Johnson

Keyword(s):

Acid Mine Drainage ◽

Mine Drainage ◽

Environmental Pollutants ◽

Microbial Oxidation ◽

Mine Waters ◽

Acid Mine ◽

Acidophilic Bacteria ◽

Active Chemical ◽

Valuable Metals ◽

Commercial Value

AbstractApproaches currently used for remediating acid mine drainage (chiefly active chemical treatment and passive bioremediation systems) have a number of major detractions, including their failure to recover potentially valuable metals from these waters. Bioremediation strategies that utilize reactor-housed microorganisms can circumvent this problem, but have tended not to be widely used due to their relatively high costs. We have devised innovative approaches for remediating mine waters that use acidophilic bacteria to remove metals either as oxidized or reduced phases, using modular bioreactors that are designed to operate at minimal cost and to generate products that have commercial value. A composite system is described that combines microbial oxidation of ferrous iron with abiotic precipitation of ferric iron as schwertmannite, a mineral that has commercial value as an absorbent of arsenate and other environmental pollutants, and as a pigment. Sulfidogenic bioreactors maintained at acidic pH values are used to selectively precipitate metal sulfides, such as CuS. Tests with synthetic mine drainage containing mixtures of soluble metals confirmed that these systems can generate relatively pure mineral deposits from complex acid waters. The units are designed to be configured differently, according to the nature of the mine water requiring treatment.

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Application of Mn-Fe Layered Double Hydroxide as an Adsorbent for the Removal of Arsenic from Synthetic Acid Mine Drainage

Jurnal Rekayasa Kimia & Lingkungan ◽

10.23955/rkl.v16i2.19215 ◽

2021 ◽

Vol 16 (1) ◽

pp. 45-51

Author(s):

Chairul - Irawan ◽

Ayu Ratma Sari ◽

Aproditha Yulianingtias ◽

Rizani Aulia Melinda ◽

Agus Mirwan

Keyword(s):

Acid Mine Drainage ◽

Layered Double Hydroxide ◽

Arsenic Removal ◽

Mine Drainage ◽

Batch Adsorption ◽

Analysis Method ◽

Acid Mine ◽

Interlayer Anion ◽

Double Hydroxide ◽

Synthetic Acid

The Mn-Fe layered double hydroxide using chloride in the interlayer anion was successfully synthesized using chemical co-precipitation methods. The Mn-Fe LDH was then applied as adsorbent for arsenic removal from synthetic acid mine drainage. The adsorbent characterizations of SEM and XRD analysis showed that the Mn-Fe LDH had many different functional groups and a high specific surface area for the adsorption processes. The morphological structure of Mn-Fe LDH by the SEM-EDS analysis method shows a round shape structure with a particle size of about 1 μm, and the XRF analysis method shows that the Mn and Fe elements dominate more than other components. Batch adsorption experimental conducted using the Mn-Fe LDH with the interlayer anion of chloride as an adsorbent to study the effect of contact time, equilibrium pH, and temperature on the arsenic removal. The Mn-Fe LDH showed high adsorption uptake capacity and selectivity for the arsenic in the synthetic acid mine drainage. The adsorption and ion exchange between interlayer chloride anions in Mn-Fe LDH and As (V) solution was the main adsorption mechanism. Therefore, the Mn-Fe LDH can be used as an adsorbent in water and wastewater treatment. In contrast, this research has the potential to be processed and developed into advanced materials.

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