Dynamics and Characterization of Soil Organic Matter in Mine Soils Sixteen Years After Amendment With Native Soil, Sawdust, and Sludge

Bendfeldt, Eric S.; Burger, James A.; Daniels, W. Lee; Feldhake, C. M.

doi:10.21000/jasmr99010225

Cited by 4 publications

(1 citation statement)

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“…Sewage sludge is widely used to increase the fertility of soils (e.g. Polglase and Myers 1996;Bendfeldt et al 1998;Brown et al 1999). However, this material may contain excessive heavy metals that could contaminate the amended soils (e.g.…”

Section: Introductionmentioning

confidence: 99%

Acid neutralising capacity of two different bauxite residues (red mud) and their potential applications for treating acid sulfate water and soils

et al. 2004

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The acid neutralising capacity (ANC) and potential beneficial uses of 2 different bauxite residues (red mud) were investigated. The results show that the ANC is much higher in the red mud disposed of using a dry stacking method at the Pingguo Alumina Refinery (China) than in the red mud disposed of by a wet method using seawater at the Queensland Alumina Ltd Refinery (Australia). The higher ANC in the Pingguo red mud is attributable to its high CaO and low SiO 2 . An incubation experiment showed that leaching of alkaline materials from the lime-treated sample was much greater than that from the red mud-treated sample. This suggests that red mud may be superior to lime for treating potential acid sulfate soils, which contain sulfide minerals that could take a long time to oxidise and release soluble acid. The effects of 2 acid-filtering systems were tested, both of which used red mud as the main material for removal of acid from passing acidic water. The results showed that the red mud-CaCO 3 filter performed better than the red mud-Mg(OH) 2 filter. Results from pot trials in Australia further demonstrated that the application of combined red mud and sewage sludge significantly improved the soil conditions for the growth of 5 Australian native tree species, in addition to Eucalyptus paniculata, which successfully grew in the same mine soil amended with the red mud and sewage sludge in previous work of G. Maddocks et al. The results from the pot experiment in China showed that the application of combined neutralising agents (red mud/lime blends) and sewage sludge to the extremely acidic mine soil was insufficient for creating appropriate ecological conditions for the growth of vetiver grass. In this experiment, additional application of zeolitic rock powder significantly improved the growth performance of the plant.

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Section: Introductionmentioning

confidence: 99%

Acid neutralising capacity of two different bauxite residues (red mud) and their potential applications for treating acid sulfate water and soils

et al. 2004

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Developing Trees Tolerant to Degraded Mine Soils in an Underground Greenhouse

Opoku-Ware

Conrad

Kukay

2019

Mining, Metallurgy & Exploration

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This project explored the potential for developing trees tolerable to degraded un-reclaimed mine site soils and tailings as a solution to re-establishing long-term tree growth on those sites. The project incorporates growing tree seedlings in an underground greenhouse grown from seeds planted in the degraded mine soils in which they will eventually be planted. The outcome of the project is expected to lead to a successful solution for re-establishing tree growth in soils and tailings containing high metal concentrations with minimal post-planting human intervention at a relatively low cost. The research is being conducted in an underground greenhouse located 100 feet below the surface in the Orphan Boy Mine Underground Mine Education Center (UMEC) located on Montana Tech's campus in Butte, Montana. The underground location is unique since it maintains a constant temperature year-round and insulates the young seedlings from inclement weather. Cost effectiveness being a goal of this project, the underground greenhouse is important since it will not require supplemental heat to be operable, minimizing cost of planting trees. Trees native to Butte are being developed from seeds and planted in the underground greenhouse. Preliminary results show high survival rates of the planted seedlings in the soils and tailings. Continuous treating promises more seedling survival and subsequent tree growth which would help revegetate sites degraded by mine site soils and tailings.

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