Sustainable amelioration of fly ash dumps linking bio-energy plantation, bioremediation and amendments: A review

Jain, Sandeep; Tembhurkar, A. R.

doi:10.1016/j.jenvman.2022.115124

Cited by 15 publications

(6 citation statements)

References 119 publications

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“…Furthermore, even covers are placed onto the damping site to prevent the carrying away to tiny CFA dust. Watertight covering precautions have also been approved to protect the discarded CFA from the rainwater (Jain, & Tembhurkar, 2022). These common disposal practices are regarded as unsightly, converting lands to non-productive sites, environmentally unsafe and are not feasible financially due to long term conservation (Menghistu, 2010;Mainganye, 2013).…”

Section: Coal Fly Ash Disposalmentioning

confidence: 99%

“…Various amendments are required to improve unfavorable CFA physicochemical properties such as high pH that is linked to unavailability of nutrients and low organic matter content (Larney, & Angers, 2012;Pandey, & Singh, 2012). Organic matter sources include fertilizers, sewage sludge, compost, sludges, and manures from wastewater treatment plants, bacterial inoculum and dairy sludge (Jain, & Tembhurkar, 2022). Organic matter plays a variety of roles including improved soil structure, reduced erosion, and it also increases infiltration.…”

Section: Approaches In Phytoremediation Of Cfa-polluted Sitesmentioning

confidence: 99%

“…Microbes assist in increasing the absorptive surface area of the plant species. The addition of bioinoculants and microbes can establish an ecological system including complex substrates and plants (Jain, & Tembhurkar, 2022). Plants growing on weathering CFA provide favorable conditions for plant growth (Weber et al, 2015;.…”

Section: Approaches In Phytoremediation Of Cfa-polluted Sitesmentioning

confidence: 99%

“…In weathering CFA, electrical conductivity values are higher, the nutrients levels are increased, the organic content is lower and the pH is decreased (Gajic et al 2016). Amendments are an effective means for further research and development of phyto-strategies for preservation of the ecosystem (Jain, & Tembhurkar, 2022). It is important to note that, amendment can cause further environmental pollution problems through leaching of ions, resulting to groundwater contamination.…”

Section: Approaches In Phytoremediation Of Cfa-polluted Sitesmentioning

confidence: 99%

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A Phytoremediation Approach for the Restoration of Coal Fly Ash Polluted Sites: A Review

Banda,

Matabane,

Munyengabe

2024

Preprint

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Generating electricity from coal combustion is highly associated with ongoing pollution problems that negatively impact the environment. Coal fly ash (CFA) is a predominant waste by-product of coal combustion which is disposed of in exposed ash dams constructed in the vicinity of power stations. Its disposal requires a large piece of land and therefore more land is converted to unproductive disposal sites, degrading the ecosystem. This waste material is classified as a hazardous substance in South Africa due to unacceptable levels of inorganic and persistent organic pollutants and its potential for dust creation. CFA is recycled and sold to the building and construction sectors, but the rate of its utilization is far less than the production rate resulting to high volumes that is stockpiled in disposal sites. More than 500 million tons CFA is produced yearly and over 200 million tons yearly remain unused globally and more CFA will continue to be produced due to high consumer energy demands, especially in countries with heavy reliance on coal for power generation. In this context, the paper discusses production of CFA, pollution problems due to its disposal, examines existing gaps within the scope of ash dam restoration processes and presents opportunities offered by phytoremediation (a low-cost and environmentally friendly technology that utilizes plants to restore the degraded environments). Ecological restoration through the use of socio-economically valuable plants (aromatic plants, legumes and grasses) has potential in addressing societal challenges and consequently impacting positively the livelihood of communities.

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Section: Coal Fly Ash Disposalmentioning

confidence: 99%

Section: Approaches In Phytoremediation Of Cfa-polluted Sitesmentioning

confidence: 99%

Section: Approaches In Phytoremediation Of Cfa-polluted Sitesmentioning

confidence: 99%

Section: Approaches In Phytoremediation Of Cfa-polluted Sitesmentioning

confidence: 99%

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A Phytoremediation Approach for the Restoration of Coal Fly Ash Polluted Sites: A Review

Banda,

Matabane,

Munyengabe

2024

Preprint

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“…For years, fly ash has been applied as cementitious material (SCM) for brick and concrete industries, embankment and mine fill, ceramic fabrication, soil amelioration by neutralizing soil acidity, extraction of plant-available nutrients, eco-friendly catalysts, low-cost material for zeolites and magnetic spheres synthesis (Table 2), excellent remediants for gas sensors and aqueous residues in wastewater (Fu et al, 2022;Jain & Tembhurkar, 2022;Li et al, 2021;Sanna et al, 2022;Sharma, Kashyap, et al, 2022;Tan et al, 2022;Wang, Jin, et al, 2022;Zhang, Shi, et al, 2021) (Figure S3). In the last decade, the number of publications focusing on fly ash uses, higher than coal bottom ash, has increased from less than 500 publications in 2000 to more than 2000 publications in 2019 (Figure S4) .…”

Section: Applications Of Coal Fly Ash and Bottom Ashmentioning

confidence: 99%

Coal ash for removing toxic metals and phenolic contaminants from wastewater: A brief review

Labidi

Ren

Sial

et al. 2023

Critical Reviews in Environmental Science and Technology

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Over the past few years, population growth, industrial progress and climate change have led to water scarcity. Thus, water pollution caused by hazardous soluble and insoluble pollutants, such as toxic metals and phenolic compounds, has become an important problem that should be dealt with urgently. For instance, new methods have been introduced to convert low-cost raw materials (i.e. coal fly ash and coal bottom ash "wastes-to-resource") into suitable materials for new cleaner production to achieve sustainability goals in wastewater-containing toxic metals and phenolic compounds purification. Obviously, the functionalization of coal fly ash and bottom ash enhances the ability of coal ash-based entities as potential materials in wastewater remediation technologies. Here, we review the application of coal ashes, including coal bottom ash and fly ash-based materials for toxic metals and phenolic compounds removal. We also examine their structural properties and functionalization to enhance their affinities toward these pollutants in aqueous environment. Even though each process has its own benefits and limitations, coal ash-based materials appear promising for the removal of toxic metals and phenolic compounds using adsorption, membrane filtration, and photocatalysis. Overall, the study on the availability of coal fly ash and bottom ash for wastewater treatment have resulted in high removal efficiencies for toxic metals and phenolic compounds. In the future, new recycling methods for coal ashes as new water purification agents should be further studied and advanced processes should be investigated in order to achieve wastewater remediation purposes.

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Response surface method for optimization of process variables for bioaccumulation of metals with Jatropha curcas on fly ash–amended soil

Jain

Tembhurkar

2023

Environ Monit Assess

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Sustainable amelioration of fly ash dumps linking bio-energy plantation, bioremediation and amendments: A review

Cited by 15 publications

References 119 publications

A Phytoremediation Approach for the Restoration of Coal Fly Ash Polluted Sites: A Review

A Phytoremediation Approach for the Restoration of Coal Fly Ash Polluted Sites: A Review

Coal ash for removing toxic metals and phenolic contaminants from wastewater: A brief review

Response surface method for optimization of process variables for bioaccumulation of metals with Jatropha curcas on fly ash–amended soil

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