The Conversion and Sustainable Use of Alumina Refinery Residues: Global Solution Examples

Fergusson, Lee

doi:10.1002/9781118647868.ch134

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Alumina refinery residue, sometimes referred to as bauxite residue or Bayer Process residue, has been used in the mining industry to neutralize acid and sequester heavy metals in tailings [14,15]; its modification for reuse in environmental remediation and industrial waste treatment projects as MARR has been outlined elsewhere [16,17].…”

Section: Experiments #1mentioning

confidence: 99%

Beneficial Reuse: A Field Trial to Remediate and a Bench-Scale Test to Revegetate Coal Seam Gas Dam Sediments from Queensland

Fergusson¹

2014

AJEP

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Coal seam gas (CSG) has become an increasingly common method of extracting methane from coal in Australia, with more than 20,000 wells expected to enter production by 2020. However, large quantities of "produced water" also come to the surface with gas, and these several thousand litres of water per day per well have to be managed sustainably. Furthermore, up to five percent of produced water is composed of suspended or dissolved solids, most typically present in the form of salty brines and a range of other elements, sometimes including benzene and other hydrocarbons like phenols. CSG solids therefore have a high pH and total alkalinity, and hence have elevated electrical conductivity. As a consequence, the settled solids from CSG extraction have no proven beneficial reuse value, and successful revegetation of dams and untreated sediments is limited to salt-tolerant grass species but is often impossible using any species under any condition. The purpose of this study is to investigate the remediation of CSG dam sediments from Queensland for the purposes of determining their potential beneficial reuse as "clean, usable soil" in revegetation projects. Experiment #1, a field trial conducted in the Bowen Basin, examined the impact of various additives to two different types of CSG dam sediments. Experiment #1 found that both types of sediment could be remediated, examples of which include decreases in pH from 10.0 to 7.4, chloride from 19,900mg/kg to 1,770mg/kg, cation-exchange capacity (CEC) from 23meq/100g to 4.0meq/100g, and sodium adsorption ratio (SAR) from 931meq/100g to 44meq/100g, and increases in total phosphorus from 27mg/kg to 855mg/kg and total nitrogen from 950mg/kg to 3,520mg/kg. These findings confirm that contaminated CSG sediments have beneficial reuse potential in dam decommissioning and revegetation projects. Experiment #2, a bench-scale test utilizing samples of treated sediments from Experiment #1, examined the revegetation potential of these remediated CSG sediments. Experiment #2 showed that both types of CSG dam sediment could be effectively revegetated using non-salt-tolerant grass species, while untreated sediments were not suitable for revegetation. However, the design and scale of this work need to be expanded, and variables such as sediment pH, CEC and SAR should be monitored and controlled more carefully before fully reliable conclusions can be made about the revegetation potential of treated CSG dam sediments.

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Section: Experiments #1mentioning

confidence: 99%

Beneficial Reuse: A Field Trial to Remediate and a Bench-Scale Test to Revegetate Coal Seam Gas Dam Sediments from Queensland

Fergusson¹

2014

AJEP

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Method for calculating the groundwater inflow into pit when mining the placer deposits by dredger

Sobko¹,

Haidin²,

Ложніков

et al. 2019

E3S Web Conf.

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The research aims to increase the performance efficiency of hydromechanization equipment under the conditions of pit operation of the Motronivskyi Mining and Concentrating Plant by determining the dynamics of change in the water level in the mine workings when developing the overburden rocks and mineral. It has been generalized the world experience of determining the groundwater inflows into mine workings, which are mined by means of hydromechanization equipment. The methods have been developed for calculating the underground water inflow into the pit reservoir, when mining the placer ores by hydromechanization equipment. It has been proved that the dredger work in the conditions of the Motronivskyi MCP pit is possible without external source of water supply. The research results in determining the influence of underwater mining of overburden rocks and ore by dredger for decreasing the water level and its subsequent recovery in the reservoir of the Motronivskyi MCP pit, allow to develop a mode of mining operations without an external source of water supply. The dynamics of water level fluctuations in mine working during the working week have been established. The research results have shown that the dredger, taking into account the technical characteristics, can continuously operate for 9.5 days under the conditions of underground water inflow into the Motronivskyi MPP pit. It has also been established that after the dredging of the overburden rocks is stopped, the level of water in the pit for 2.5 days will recover.

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The Conversion and Sustainable Use of Alumina Refinery Residues: Global Solution Examples

Cited by 2 publications

References 4 publications

Beneficial Reuse: A Field Trial to Remediate and a Bench-Scale Test to Revegetate Coal Seam Gas Dam Sediments from Queensland

Beneficial Reuse: A Field Trial to Remediate and a Bench-Scale Test to Revegetate Coal Seam Gas Dam Sediments from Queensland

Method for calculating the groundwater inflow into pit when mining the placer deposits by dredger

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