Acid Mine Drainage (AMD): an environmental concern generated by coal mining

Ojonimi, Theophilus I.; Asuke, F.; Onimisi, M.; Onuh, C.Y

doi:10.15243/jdmlm.2019.064.1875

Cited by 6 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inappropriate handling and placement of these materials, especially those having high fraction of potentially acid-forming (PAF) materials, can raise environmental problems. Under oxidized conditions, the sulfide minerals (especially pyrite, FeS2) contained in PAF materials are oxidized and form water rich in sulfuric acid so-called acid mine drainage (AMD) [1,2]. Simplified AMD formation is shown by following reactions, where FeS2 is an example of sulfide minerals: 2FeS2 (s) + 7O2 + 2H2O == 2Fe 2+ + 4SO4 2-+ 4H + ...... (1) The dissolved Fe 2+ , SO4 2-, and H+ represent an increase in dissolved solid and activity of water and a decrease in pH.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, AMD formation generates very acidic water which can then dissolve relatively insoluble earth materials into free ionic species, such as heavy metals which can result in toxic conditions in aquatic as well as terrestrial ecosystems in surrounding areas. Toxic metals such as nickel, iron, copper, lead, cyanide, arsenic, and cadmium are easily dissolved in low pH [2]. The AMD formation will continuously occur and last as long as the PAF materials still exist and expose to air and water.…”

Section: Introductionmentioning

confidence: 99%

“…The AMD formation will continuously occur and last as long as the PAF materials still exist and expose to air and water. This is why AMD formation considered as one of the most serious problems in mining industries worldwide [1,2,3,4,5], including Indonesia [6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dolomite and organic compost application for preventing acid mine drainage formation in a mesocosm system

Ali

Putranto

Nurcholis

2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Acid mine drainage (AMD) is one of most serious environmental problems facing mining industries. It results from oxidation of sulfide minerals contained in mining wastes, such as rock disposals in mine sites. This study was to investigate AMD formation from waste rocks containing potentially-acid forming (PAF) materials treated with dolomite and compost in a mesocosm system. The system comprised a plastic drum of 150-cm height and 50-cm diameter filled with 15-cm sand at the botom layer, over-laid by 50-cm mixture of PAF+10% of either dolomite or compost, and 35-cm top-soil layer on the top. The drum surface of the sand layer was equipped with a valve to drain leached water into a collecting container. The control was a similar constructed mesocosm without addition of either ameliorant. The drums were installed into the ground of the mined land so that their surfaces were as high as the surrounding soil surface and left under field condition. The leachate samples were taken two-weekly in the early two months and monthly until the day 487. The system demonstrated that both dolomite and compost significantly increased pH from around 3 to pH>6 and reduced dissolved Al and Fe concentrations. However, the dissolved Mn concentration was still high (>20 mg L−1) in all treatments even at the pH reached >6. .

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dolomite and organic compost application for preventing acid mine drainage formation in a mesocosm system

Ali

Putranto

Nurcholis

2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Mining, as an economic activity has contributed greatly to the GDP growth of several countries (Acheampong and Ansa 2017;Wang et al 2021) however there is an attendant challenge of pollution especially the release of wastewater containing heavy metals causing severe damage to the water resources (Saha and Sinha 2018). Heavy metals which includes Mn, Pb, Ni, Fe, Cu, Cd, Cr with other physicochemical parameters like; turbidity, sulphate, phosphate, nitrate, COD, BOD are the major characteristics of an abandoned mining site wastewater (Bwapa et al 2017;Ojonimi et al 2019). Exposure to these contaminants is the major cause of infirmities, diseases and dysfunctions both in plants and animals (Balali-Mood et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Adsorptive behaviour of rutile phased titania nanoparticles supported on acid-modified kaolinite clay for the removal of selected heavy metal ions from mining wastewater

et al. 2022

View full text Add to dashboard Cite

This study investigated the removal of metal ions pollutants in mining wastewater such as Mn (II), Fe (III), Pb (II) and Cu (II) ions by acid-activated kaolinite clay (AAC) and titanium (IV) oxide (TiO2) nanoparticles supported on the AAC (TiO2–AAC). TiO2 nanoparticles were synthesised using titanium salt precursor with leaves extract of Parkia biglobossa and impregnated on the AAC to develop TiO2-AAC as a nanoadsorbent. The AAC and TiO2–AAC nanocomposites were characterized using different analytical techniques. Actual concentrations of selected heavy metals in mining wastewater was determined prior and after treatment using the prepared adsorbents in batch adsorptive studies with atomic absorption spectrophometer. The characterisation studies confirmed that a rutile phase TiO2 was doped the on acid-activated kaolinite clay. Morphology analysis shows that the developed adsorbents were homogeneously dispersed and porous. The results of the surface area further revealed that the AAC, TiO2 and TiO2–AAC has 14.15, 10.23 and 32.98 m2/g, respectively. The percentage removal of heavy metals followed the order of TiO2–AAC > AAC due to the higher surface area and enhanced surface functionality of the former than the latter. The adsorption capacity increased from 86.13 to 91.99% (Fe (III)), 83.12 to 89.37% (Mn (II)), 68.48 to 81.95% (Cu (II)) and 29.49 to 32.39% (Pb (II)) from AAC to TiO2–AAC. The kinetic and isotherm models were best fitted by pseudo-second-order kinetics and Langmuir model. Whilst the thermodynamic investigation found that, the adsorption process was endothermic, spontaneous and chemisorption controlled. Conclusively, the TiO2–AAC nanocomposite exhibited better performance than AAC alone.

show abstract