Nickel and Zinc Removal from Acid Mine Drainage: Roles of Sludge Surface Area and Neutralising Agents

Olds, William E.; Tsang, Daniel C.W.; Weber, Paul; Weisener, Christopher G.

doi:10.1155/2013/698031

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…West Coast AMD is characterised by high acidity and elevated metal concentrations (Fe, Al, Ni, Zn, Cu, Pb, Cd, etc. ) (Olds et al 2013). The sulphur and pyrite content (and therefore AMD generating potential) of coal measures rock varies significantly on a geographic basis within the Buller Coalfield and is also constrained lithologically (Hughes et al 2006;Weber et al 2008;Weisener & Weber 2010).…”

Section: Introductionmentioning

confidence: 99%

Acid mine drainage analysis for the Reddale Coal Mine, Reefton, New Zealand

Olds¹,

Weber²,

Pizey³

et al. 2016

New Zealand Journal of Geology and Geophysics

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The Reddale Coal Mine is located within the Brunner Coal Measures, which are often assumed to be potentially acid-forming rocks that will release acidity when disturbed by mining. The premining assessment of the site acid mine drainage (AMD) potential assumed overburden acidneutralising capacity was negligible, similar to Brunner Coal Measures in other areas, and that AMD would occur almost immediately. Column trials using poorly stored and partially oxidised drill core indicated potentially acid-forming (PAF) overburden readily produced acidity with no lag period. Based on the pre-mining assessment, a Ca(OH) 2 dosing plant was constructed for AMD management. Once mining commenced, tiphead samples collected during construction of the Ferndale engineered landform showed that the net acidproducing potential of the potentially acid-forming overburden was overestimated by about one-third when acid-neutralising capacity and non-sulphide forms of sulphur were accounted for. When coupled with material properties which resulted in good compaction of waste rock, construction of the engineered landform in 4 m lifts to minimise convective oxygen flux and aglime (<2.5 mm CaCO 3) amendments to each lift, acidity loads from the Ferndale engineered landform were negligible. Compliance monitoring downstream of the mine site at Red4 shows that, to date, site discharge pH has remained circum-neutral. Premining AMD management decisions, primarily construction of a Ca(OH) 2 dosing plant that was never commissioned, therefore proved overly conservative. The timing and expense of AMD management has the potential to influence project feasibility and needs to be well understood.

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Section: Introductionmentioning

confidence: 99%

Acid mine drainage analysis for the Reddale Coal Mine, Reefton, New Zealand

Olds¹,

Weber²,

Pizey³

et al. 2016

New Zealand Journal of Geology and Geophysics

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“…The Ni concentration was reduced by 26% to an average pre-treated concentration of 0.46 mg/L. The sorption and co-precipitation of Ni with the solid phase of Fe and Al precipitants may be associated with the reduction in Ni concentration as shown in the findings by Olds et al (2013), where a linear trend between pH increase and Ni co-precipitation was observed [28]. The SO 4 2− concentration was reduced by 13% from 1642 mg/L to an average concentration of 1446 mg/L (refer to Figure 4C).…”

Section: Acid Mine Drainage Pre-treatmentmentioning

confidence: 67%

Co-Remediation of Acid Mine Drainage and Industrial Effluent Using Passive Permeable Reactive Barrier Pre-Treatment and Active Co-Bioremediation

2022

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This study evaluated the co-remediation performance of an active–passive process comprised of passive permeable reactive barrier acid mine drainage (AMD) pre-treatment and active anaerobic digestion treatment of AMD with effluent as a carbon source. The bioreactor was operated for 24 consecutive days with peak chemical oxygen demand (COD) and sulphate loading rates of 6.6 kg COD/m3/day and 0.89 kg SO42−/m3/day, respectively. The AMD pre-treatment was capable of removing 99%, 94% and 42% of iron (Fe), potassium (K), and aluminium (Al) concentrations, respectively. The biological treatment process was capable of removing 89.7% and 99% of COD and sulphate concentrations, respectively. The treated wastewater copper (Cu), sulphate (SO42−), and pH were within the effluent discharge limits and the potable water standards of South Africa. Fe, Al, manganese (Mn), nickel (Ni), and zinc (Zn) concentrations in the treated wastewater were marginally higher than the discharge and potable water limit with all concentrations exceeding the limit by less than 0.65 mg/L. The remediation performance of the process was found to be effective with limited operational inputs, which can enable low cost co-remediation.

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“…Limestone shows a complete removal of iron and aluminum. The formation of iron and aluminum precipitates serve to be beneficial in the partial removal of Ni from AMD 24 . However, the high amount of Fe present in the AMD allowed the near complete removal of Ni from the effluent at most 99.33%.…”

Section: Resultsmentioning

confidence: 99%

Comparing the performance of low‐grade nickel ore and limestone for treatment of synthetic acid mine drainage

Turingan

Fabella

Sadol

et al. 2020

Asia-Pacific J Chem Eng

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Goethite is a dominant component of nickel laterite ores, which is capable of adsorbing metal ions in water. The potential of the unused low-grade nickel ore (LGO) to treat synthetic acid mine drainage (AMD) was investigated.LGO characterization identified the presence of goethite (α-FeOOH), calcium oxide (CaO), and manganese aluminum oxide. The performance of LGO for AMD treatment was evaluated using jar test and compared with limestone. At 0.5 ml AMD/g media, LGO increased the pH of AMD to 5.36 while limestone completely neutralized it. LGO removed more than 99% of Al and Fe, 94% of Ni, and 93% of sulfates compared to a 70% sulfate removal using limestone. The lower sulfate removal may be due to the armouring of the limestone surface. Furthermore, a batch test was conducted using both LGO and limestone as layered treatment media in an oxic and anoxic setup. Effluent pH remained constant while conductivity and TDS stabilize at 2,000 μS/cm and 1,000 ppm, respectively. Both setups achieved 99% removal of Fe and Al,~90% Ni removal, and between 70% and 80% sulfate removal. These results indicate that LGO is a possible alternative material to be used for heavy metal adsorption for AMD treatment.

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Nickel and Zinc Removal from Acid Mine Drainage: Roles of Sludge Surface Area and Neutralising Agents

Cited by 14 publications

References 20 publications

Acid mine drainage analysis for the Reddale Coal Mine, Reefton, New Zealand

Acid mine drainage analysis for the Reddale Coal Mine, Reefton, New Zealand

Co-Remediation of Acid Mine Drainage and Industrial Effluent Using Passive Permeable Reactive Barrier Pre-Treatment and Active Co-Bioremediation

Comparing the performance of low‐grade nickel ore and limestone for treatment of synthetic acid mine drainage

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