Study on the treatment of acid mine wastewater by coal fly ash

Xu, Jianping; Wan, Haitao

doi:10.2991/icmaee-14.2014.40

Cited by 2 publications

(2 citation statements)

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“…Also, coal fly ashes quite often contain high concentrations of potential pollutants such as heavy metals [32,33], comparing to biomass ashes, and may also have additional negative environmental impacts when using as neutralizing material for AMD treatment. The use of coal fly ashes from coal power plants for AMD treatment has been widely investigated [34][35][36][37][38][39][40][41]. However, there are few studies about AMD remediation by biomass ashes, particularly, from wooden chip and rice husk combustion [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Biomass Ashes for Acid Mine Drainage Remediation

Bogush

Dabu²,

Тихова

et al. 2019

Waste Biomass Valor

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Acid mine drainage (AMD) is the largest environmental problem facing the world mining and processing industry because it has low pH and can contain high concentrations of potential pollutants. Biomass ash (BA) can be considered as a potential material for AMD treatment. The main goal of this work was to investigate potential use of Biomass ash of CPK-LA and PK-LA types for AMD remediation. Four UK BAs from different fuels (i.e. straw, meat and bone meal, poultry litter), synthetic AMD, and raw AMDs (Belovo and Ursk) were used for the AMD treatment experiments. Batch experiments showed that in 1 h the biomass ash from straw combustion can effectively neutralise the synthetic AMD and the Belovo AMD with removal of potential pollutants at the liquid-to-solid ratio (L/S) of 100-250 and 10-50, respectively. The biomass ashes from straw and poultry litter combustion can effectively remove pollutants from the Ursk AMD at L/S 100 and adjust pH. The metal concentrations of those treated AMDs met receiving water quality standards. Potential pollutants precipitated as carbonate/hydroxide/sulphate, co-precipitated with Fe oxyhydroxides and Ca phosphates, and appeared as new phases such as Ca, Cu, Zn phosphates and Ca, Fe phosphates. This investigation is essential for development of appropriate, environmentally friendly and economically rational waste management. Graphic AbstractKeywords Biomass ash · AMD remediation · Industrial water treatment · Straw · Meat and bone meal · Poultry litter Extended author information available on the last page of the article Waste and Biomass Valorization 1 3 Statement of NoveltyThis paper presents novel research on using biomass ashes of CPK-LA and PK-LA types (e.g., straw and animal residue) for acid mine drainage treatment. This study highlights industrial symbiosis that is becoming very important in sustainable development.

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Section: Introductionmentioning

confidence: 99%

Biomass Ashes for Acid Mine Drainage Remediation

Bogush

Dabu²,

Тихова

et al. 2019

Waste Biomass Valor

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“…To improve SO 4 2− reduction, seeding with Al(OH) 3 and gypsum can increase the sulphate recovery from 60-90% [81]. Alkaline and acidic pre-treatment has also been applied to modify CFA prior to water treatment [82,83]. The treatment of wastewater with CFA is summarised in Table 4.…”

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confidence: 99%

The Recycling of Coal Fly Ash: A Review on Sustainable Developments and Economic Considerations

et al. 2022

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The recycling and utilization opportunities for coal fly ash (CFA) have increased in the past two decades. However, limited commercialization of the material is still reported, while disposal and management remain major concerns. CFA utilization is currently commercially feasible in the building and construction industry. Other alternative uses that are being explored involve the extraction of valuable metals and the purification of wastewater. The CFA-produced adsorbent material utilized in wastewater purification processes should be able to generate water that meets the legal quality requirements for reutilization in alternative applications. On the other hand, in the recovery of metallic components such as smelter-grade alumina, high recovery and high purity products are only achievable through the processing of CFA using expensive and energy—intensive processes. Furthermore, most of the current CFA recycling processes tend to generate secondary solid residues (SSR), which can cause environmental pollution, thus requiring further downstream processing. In this context, this paper reviews and discusses current research on CFA recycling methods, challenges and opportunities associated with resource recovery from CFA, and the acceptability of the value-added products, and it therefore proposes sustainable processes for CFA utilization. This review further suggests that to successfully compete with bauxite for production of smelter-grade alumina, other saleable value-added products such as Ti, Fe and the REEs should be recovered by engineering an integrated process design. The generated SSR in each process must also be characterized, recycled and re-used to reduce waste production and advance the circular economy concept. The review concludes that for CFA to become considered as a more attractive commercial resource, there is need for its complete and holistic utilization in high volumes and in different applications to offset its low value.

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Study on the treatment of acid mine wastewater by coal fly ash

Cited by 2 publications

References 16 publications

Biomass Ashes for Acid Mine Drainage Remediation

Biomass Ashes for Acid Mine Drainage Remediation

The Recycling of Coal Fly Ash: A Review on Sustainable Developments and Economic Considerations

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