Biogeochemistry of Acid Drainage

Jacobs, James A.; Vance, David B.

doi:10.1002/9781118749197.ch3

Cited by 3 publications

(6 citation statements)

References 73 publications

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“…Ideally, the limestone should be at least 90 % CaCO 3 and should have maximum size of 1.3-1.9 cm (Bhattacharya et al 2008). On the other hand, Zipper et al 2011 suggested that the systems are built with high-calcium (> 90 %) limestone in the 10 to 15 cm size range. However, other researchers, Mashalane et al 2018 used limestone with 85 % of CaCO 3 in their study of passive treatment system in Carolina, Mpumalanga.…”

Section: Limestone Characterizationmentioning

confidence: 99%

“…Subsequently, peat soil was placed over the limestone. As suggested by Zipper et al 2011, no compact and physical disturbance on the organic layer to prevent creation of zones of preferential vertical ow, that will 'short circuit' the system and decrease treatment effectiveness. Total thicknesses for both media is 15 cm height.…”

Section: Lab Scale Con Gurationmentioning

confidence: 99%

“…Previous studies reported various size ranges. For instance, Zipper et al 2011, in his paper stated that limestone size in actual design of SAPS that has been used was 100 mm to 152 mm. In contrast, Yim et al 2015 via column set up that almost similar to this study adopted course gravel limestone particle size between 20 to 30 mm.…”

Section: Limestone Characterizationmentioning

confidence: 99%

“…Other than that, primary factor governing alkalinity generation is the rate at which limestone dissolved, which is effected by solution chemistry (Zipper et al 2011). Considering this reaction happen at nal stage of the SAPS prior discharged out the synthetic AMD solution as e uent.…”

Section: Temporal Changes Of Ph Level and Fe Concentrationmentioning

confidence: 99%

“…It is a hybrid treatment system incorporating technical merits of anaerobic wetland and anoxic limestone drain (Yim et al 2015). Three major system elements of this system are the drainage system, a limestone layer and organic layer (Zipper et al 2011…”

Section: Introductionmentioning

confidence: 99%

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Iron removal and pH stabilization of synthetic acid mine drainage (AMD) using peat soil and limestone.

Halim

Ibrahim

Izhar

et al. 2021

Preprint

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A Successive Alkalinity Producing System (SAPS) was evaluated for the remediation of synthetic Acid Mine Drainage (AMD) by using an organic substrate of peat soil and limestone aggregate. The characterization of the AMD was conducted by the testing the AMD effluent originated from active mining site at Pengkalan Hulu, Perak, Malaysia. The characterization of the peat soil and limestone revealed stipulated composition, carbon content in the peat soil and particle size distribution of the limestone. Synthetic AMD was prepared incorporating iron sulphate (FeSO4) and sulphuric acid (H2SO4). The synthetic AMD was acidic (pH < 4.0) and with 50, 75 and 100 ppm Iron (Fe) concentration. A laboratory scale physical model to simulate a tailing pond was developed. The synthetic AMD was introduced and passed through the filtration media. Subsequently, water samples were collected and analyzed to determine pH level. Additionally, the Fe concentration was analyzed using UV-Vis test at 6 to maximum 48 hours’ retention time. The residues of the peat soil and limestone from the physical model were further analyzed using SEM-EDX microscopic to determine the remaining iron content absorb or precipitate onto the peat soil and limestone. The analysis revealed that the innovative methodology has successfully reduced more than 85 % iron content and neutralized the pH only after 6 hours of retention time. These results proved the combination of peat soil and limestone potentially can be proposed as the alternate solution for treating the AMD effluent from the mining site.

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Section: Limestone Characterizationmentioning

confidence: 99%

Section: Lab Scale Con Gurationmentioning

confidence: 99%