scholarly journals Acid mine drainage mitigation: A review

2020 ◽  
pp. 97-118
Author(s):  
Daniel Lazo
Keyword(s):  
Acid Mine Drainage ◽  
Large Scale ◽  
Mine Drainage ◽  
Acid Rock Drainage ◽  
Human Beings ◽  
Mining Operations ◽  
Aquatic Life ◽  
Acid Rock ◽  
Sulphide Minerals ◽  
Acid Mine

Acid mine drainage (AMD) or acid rock drainage (ARD) refers to the effluents from coal and metal mines. AMD is a common phenomenon which occurs naturally as a process of rock weathering, but is increased in large scale due to human activities such as construction contracts (transportation corridors, dam build, etc.) and mining operations. This phenomenon denotes the acidic water that is produced during exposure of sulphide minerals (mainly pyrite) to air and water through a natural process, and creates sulphuric acid. AMD is a hazard to animals, aquatic life and human beings as it increases the acidity and dissolves metals. Preventing and treating AMD is an important issue in a mine site not only during operation life but also after the mine is abandoned.

Effects of acid mine drainage on clay minerals suspended in the Tinto River (Río Tinto, Spain). An experimental approach

Clay Minerals ◽  
1999 ◽  
Vol 34 (1) ◽  
pp. 99-108 ◽  
Author(s):  
E. Galan ◽  
M. I. Carretero ◽  
J . C. Fernandez-Caliani
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Drainage Basin ◽  
Acid Rock Drainage ◽  
Chemical Degradation ◽  
Acid Rock ◽  
Tinto River ◽  
Acid Mine ◽  
Mineral Stability ◽  
Water Ph

AbstractThe Tinto river is one of the most polluted stream environments in the world, as a result of both acid mine drainage and natural acid rock drainage. Two representative samples from the phyllosilicate-rich rocks exposed in the drainage basin (Palaeozoic chlorite-bearing slates and Miocene smectite-rich marls) were treated with acid river water (pH = 2.2) for different times to constrain the effects of extreme hydrogeochemical conditions on clay mineral stability. Illite and kaolinite did not show appreciable variations in their crystal chemistry parameters upon treatment. Chlorite underwent an incipient chemical degradation evidenced by the progressive loss of Fe in octahedral positions coupled with a shortening of the b unit-cell parameter, although no weathering products of chlorite were observed. Smectite and calcite were rapidly and fully dissolved thus neutralizing the water acidity, and subsequently Fe and Al oxy-hydroxides and opaline silica precipitated from the aqueous solution, together with a neoformed amorphous silicate phase largely enriched in Al and Mg.

Acid mine drainage and acid rock drainage processes in the environment of Herrerías Mine (Iberian Pyrite Belt, Huelva-Spain) and impact on the Andevalo Dam

2004 ◽  
Vol 47 (2) ◽  
pp. 185-196 ◽  
Author(s):  
J. A. Grande ◽  
R. Beltrán ◽  
A. Sáinz ◽  
J.C. Santos ◽  
M. L. de la Torre ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Acid Rock Drainage ◽  
Iberian Pyrite Belt ◽  
Acid Rock ◽  
Acid Mine

scholarly journals Removal of Copper from Acid Mine Drainage (AMD) or Acid Rock Drainage (ARD)

2021 ◽  
Vol 13 (07) ◽  
pp. 435-454
Author(s):  
Agabu Shane ◽  
Xinyang Xu ◽  
John Siame ◽  
Alick Nguvulu ◽  
Tewodros Mitiku Tena ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Acid Rock Drainage ◽  
Acid Rock ◽  
Acid Mine

scholarly journals Mesoporous Poly(melamine-co-formaldehyde) Particles for Efficient and Selective Phosphate and Sulfate Removal

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6615
Author(s):  
Konstantin B. L. Borchert ◽  
Christine Steinbach ◽  
Berthold Reis ◽  
Niklas Gerlach ◽  
Philipp Zimmermann ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Selective Adsorption ◽  
Mineral Resources ◽  
Hybrid Particles ◽  
Aquatic Life ◽  
Acid Mine ◽  
Surface Areas ◽  
Sulfate Removal ◽  
Adsorption Capacities

Due to the existence-threatening risk to aquatic life and entire ecosystems, the removal of oxyanions such as sulfate and phosphate from anthropogenic wastewaters, such as municipal effluents and acid mine drainage, is inevitable. Furthermore, phosphorus is an indispensable resource for worldwide plant fertilization, which cannot be replaced by any other substance. This raises phosphate to one of the most important mineral resources worldwide. Thus, efficient recovery of phosphate is essential for ecosystems and the economy. To face the harsh acidic conditions, such as for acid mine drainage, an adsorber material with a high chemical resistivity is beneficial. Poly(melamine-co-formaldehyde) (PMF) sustains these conditions whilst its very high amount of nitrogen functionalities (up to 53.7 wt.%) act as efficient adsorption sides. To increase adsorption capacities, PMF was synthesized in the form of mesoporous particles using a hard-templating approach yielding specific surface areas up to 409 m2/g. Different amounts of silica nanospheres were utilized as template and evaluated for the adsorption of sulfate and phosphate ions. The adsorption isotherms were validated by the Langmuir model. Due to their properties, the PMF particles possessed outperforming maximum adsorption capacities of 341 and 251 mg/g for phosphate and sulfate, respectively. Furthermore, selective adsorption of sulfate from mixed solutions of phosphate and sulfate was found for silica/PMF hybrid particles.

scholarly journals How Pat Metheny came to Carolina in Mpumalanga, South Africa: using music in transdisciplinary water research

2013 ◽  
Vol 9 (2) ◽  
Author(s):  
Johann Tempelhoff
Keyword(s):  
South Africa ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Mining Operations ◽  
North West ◽  
Mpumalanga Province ◽  
Municipal Water Supply ◽  
Acid Mine ◽  
Local Stakeholders ◽  
To Come

Listening to music can help researchers to comprehend and gain insight into complex problems in transdisciplinary research. This article explains how members of a research group at North-West University in South Africa conducted research on a crisis in the urban settlement of Carolina in Mpumalanga Province when acid mine drainage (AMD) from local coal mining operations was found in the municipal water supply. In grappling with complex issues such as the failure of communication with local stakeholders, the group resorted to using the music of Pat Metheny’s music to come to abetter understanding of the crisis.  Keywords:Carolina, acid mine drainage (AMD), Pat Metheny, transdisciplinarity, coal mining.Disciplines: History, water studies, music studies, transdisciplinarymethodology.

scholarly journals Effect of Chitosan’s Degree of Deacetylation on the Performance of PES Membrane Infused with Chitosan during AMD Treatment

Membranes ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 52 ◽  
Author(s):  
Machodi Mathaba ◽  
Michael Olawale Daramola
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Pure Water ◽  
Synergetic Effect ◽  
Synthesis Process ◽  
Process Conditions ◽  
Mining Operations ◽  
Degree Of Deacetylation ◽  
Acid Mine ◽  
Pes Membrane

Acid mine drainage is an environmental problem associated with mining operations and activities. Its treatment is essential to achieving environmental sustainability. In this study, a polyethersulphone (PES) membrane infused with chitosan is proposed as a point-of-use material for treating acid mine drainage (AMD). The composite material explored the synergetic effect between chitosan and polymer, particularly considering the effect of the degree of deacetylation (DD) of chitosan on the performance of membrane. Chitosan was produced from chitin under various synthesis process conditions and infused within polyethersulphone membrane. The results obtained show that chitosan with the highest degree of deacetylation was achieved with a temperature of 100 °C and NaOH concentration of 40 wt%. Increasing the temperature above 100 °C started degrading already formed or exposed amine groups, thus, reducing the DD of the chitosan sample. The contact angle and porosity analysis indicated that the hydrophilic nature of the membrane was enhanced with increasing DD of the chitosan. The performance of the membranes was conducted on a Dead-end filtration cell using synthetic acid mine drainage. The results showed that the flux and rejection of the membrane was enhanced with increasing degree of deacetylation. PES 5 and PES 1 were blended with chitosan having the highest (95.97%) and lowest (33.93%) degree of deacetylation, respectively. PES 5 reported pure water flux of 123 L/m2·h and PES 1 was recorded as 104 L/m2·h. Similarly, the rejection of the membrane was improved with increasing chitosan’s degree of deacetylation. PES 5 had higher rejection and PES 1 had the least rejection. Maximum rejection for the contaminants was determined as 98.05, 97.39, 96.25, 95.24 and 80.34% for Mn2+, Fe2+, Mg2+ and Ca2+ and SO42−, respectively. The results obtained show that chitosan’s degree of deacetylation has a positive effect on the performance of polyethersulphone membrane during the treatment of acid mine drainage.

scholarly journals Penerapan Wetland untuk Pengelolaan Air Asam Tambang

KURVATEK ◽  
2018 ◽  
Vol 3 (2) ◽  
pp. 41-46
Author(s):  
Agus Panca Adi Sucahyo ◽  
Waterman Sulistyana Bargawa ◽  
Mohammad Nurcholis ◽  
Tedy Agung Cahyadi,
Keyword(s):  
Heavy Metals ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Mining Industry ◽  
Acid Rock ◽  
Acid Mine ◽  
Run Off ◽  
Environmental Pollution Problem ◽  
State Water ◽  
Wetland System

ABSTRAKAir asam tambang (AAT) merupakan air dengan kandungan pH rendah (di bawah 5) yang ditimbulkan akibat industri pertambangan. AAT terbentuk dari bertemunya tiga komponen, yaitu batuan yang mengandung sulfat, air dan udara. Batuan yang mengandung asam (potential acid foarming) yang terkupas selama kegiatan penambangan dapat membentuk AAT setelah bertemu udara dan air yang berasal dari paparan air hujan langsung, air limpasan dan rembesan air tanah. Air limpasan yang tercemar tersebut mempunyai pH sekitar 2 – 4 dengan kandungan logam berat berupa Al, Fe, Mn, Cu dan Zn. Metoda dalam pengelolaan AAT terdiri dari sistem aktif dan sistem pasif. Paper ini membahas mengenai pengelolaan AAT dengan menggunakan sistem pasif wetland. Cakupan yang dibahas menyajikan beberapa hal terkait wetland diantaranya: ukuran wetland dan desain wetland yang tepat termasuk keasaman air yang keluar dari tambang (pH), kondisi reaksi oksidasi, laju aliran air serta waktu yang diperlukan dalam proses wetland serta luasan area yang tersedia untuk konstruksi wetland. Manfaat yang dihasilkan dari studi ini dapat digunakan untuk penelitian selanjutnya dalam rangka program penutupan tambang tembaga dan emas.Kata kunci: wetland, remediasi pasif, air asam tambang (AAT) Acid mine drainage (AMD) is the most significant environmental pollution problem with a low pH (below 5) caused by the mining industry. AMD is former from three components, exposed acid rock contain sulphate, water and air. The exposed acid rocks (potential acidic forming) during mining activities create a chemical reaction with air and water can be from seepage and run off. The water overflow from pit lake has a pH around 2 – 4 and contain heavy metals, i.e. Al, Fe, Mn, Cu, and Zn. The methods of AMD treatments that are active and passive systems. This paper discusses the AMD treatment using passive wetland system. Main factors passive removal of acidity and heavy metals using wetlad system when determining type and size appropriate wetland system include the influent acidity, pH, redox state, water flow rates and retention times, the area available for wetland. The benefits of this  study for passive AMD treatment using wetland can be used for further research to supporting the copper and gold mine closure program. Keywords: wetland, passive reamediation, acid mine drainage

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