Remediation of Fly Ash Dumpsites Through Bioenergy Crop Plantation and Generation: A Review

Roy, Madhumita; Roychowdhury, Roopali; Mukherjee, Pritam

doi:10.1016/s1002-0160(18)60033-5

Cited by 38 publications

(14 citation statements)

References 105 publications

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“…Literature studies revealed that a large variety of chinensis (Chu, 2008). In Poland, naturally coloniser species of FA dumps with high ecological potential identified are Festuca arundinacea, Madhumita et al, 2018;Maiti & Pandey, 2021;Pandey, 2012aPandey, , 2012bPandey, 2015;Rau et al, 2009). Summarised data could pave way to frame restoration strategies at newly form FA dumps as per its respective spatial distribution of plants.…”

Section: Grassmentioning

confidence: 99%

Ecological restoration of fly‐ash disposal areas: Challenges and opportunities

2021

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Fly-ash (FA) is a by-product or residue that is produced during the combustion of coal for energy production in thermal power plants. The huge amount of FA generation is a global problem; and coal power generators still can find no safe and sustainable approach to FA disposal. FA dumps not only create air, water, and soil pollution but also pose a noxious impact on human health by introducing toxins in the food chain through biomagnification. A non-food vegetation cover can help to mitigate FA dump-related environmental health issues. However, alkaline pH, toxic metals, lack of soil microbes, and pozzolanic properties of FA limit plant growth. In this regard, ecological restoration of FA dumps through phytoremediation should be a holistic approach. This review focuses on the role of naturally occurring plants, tree plantation, and microbial inoculation in the ecological restoration of FA dumps and their role in the physicochemical changes of FA substrate. Application of organic material has been proved to help establish vegetation cover on FA dumps as they provide essential nutrients for plant and microbial growth. Morphological, physiological, and antioxidant responses of plants grown on FA dumps are also discussed in this study in detail. Overall, this review summarises the different comprehensive approaches of FA dump restoration and compiles ways to convert barren FA dumps into useful sites for deriving bioeconomy with phytoproducts. The outcomes of this study should be beneficial helping identify site-specific ecorestoration of FA dumps through an integrated approach.

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Section: Grassmentioning

confidence: 99%

Ecological restoration of fly‐ash disposal areas: Challenges and opportunities

2021

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“…While partial recovery of the metals was obtained, there was a reduced energy recovery in the oil phase from these types of systems due to the large deposition of carbon in the solid residue . Further analysis suggests that there are significant advantages to a combined system, and integrated phytomanagement could generate significant income streams, provide a sustainable solution to waste management and give further environmental and social benefits …”

Section: Combining Phytoremediation/phycoremediation and Bioenergy Prmentioning

confidence: 99%

“…74 Further analysis suggests that there are significant advantages to a combined system, and integrated phytomanagement could generate significant income streams, provide a sustainable solution to waste management and give further environmental and social benefits. 75 A number of studies reported bioenergy production from wet algal biomass used for remediation of watercourses. For example, a combination of biodiesel production and metal removal was reported by Kim et al, 76 where residual biomass of Nannochloropsis oculata post-lipid extraction was used to remove chromium from aqueous solutions.…”

Section: Combining Phytoremediation/ Phycoremediation and Bioenergy Pmentioning

confidence: 99%

Making light work of heavy metal contamination: the potential for coupling bioremediation with bioenergy production

Raikova

Piccini

Surman

et al. 2019

J of Chemical Tech & Biotech

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Intense anthropogenic activity continues to expose the natural environment to heavy metal contamination. Whilst a number of physical and chemical solutions for remediation exist, the use of higher plants and algae for clean‐up of contaminated landscapes, termed ‘phytoremediation’ and ‘phycoremediation’, respectively, offer an attractive and sustainable alternative. However, these remediation processes will always lead to a high‐moisture, heavy metal‐contaminated biomass, which must be further processed to partition, or render inert, the metal contaminants. Conversion of this metal‐rich biomass into second‐generation biofuels offers a useful route to subsidise the economics of remediation activities. Here we briefly review the various methods for bioremediation of heavy metals, and discuss the potential to produce bioenergy from these biomass sources. Coupling the bioremediation activity to bioenergy production gives far‐reaching social and economic benefits; however, established processes such as direct combustion and anaerobic digestion risk releasing heavy metals back into the environment. Alternatively, thermochemical conversions such as pyrolysis or hydrothermal liquefaction (HTL) offer significant advantages in terms of the segregation of metals into a relatively inert and compact solid phase while producing a biocrude oil for bioenergy production. In addition, preliminary work suggests that the HTL process can also be used to partition essential macronutrients, such as N, P and K, into an aqueous medium, allowing additional nutrient recycling. © 2019 Society of Chemical Industry

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“…But, in many countries, this industrial by-product has not been appropriately utilized rather it has been ignored and dumped like a leftover substance. As a consequence, it poses a signi cant threat to the soil environment, streams as well as groundwater (Basta and McGowen 2004;Roy et al 2018) and becomes a noxious source of health hazards for humans and animals when reached to the domestic areas (Bryan et al 2012;Guleria and Chakma 2021). Also, the dumping sites do not support sound plant growth because of its nutritional de ciency (generally N and P), low microbial activity, high salt concentration along enhanced heavy metal loads (Sett 2017;Jambhulkar et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, disposal of such a high amount of y ash requires enormous water, energy, and land areas (Basu et al 2009). Though it is not estimated scientists speculate that there are more than 82,200 ha area of only y ash ponds in India adjacent to the power plant areas (Roy et al 2018). Therefore, appropriate y ash management would remain a great apprehension of the century.…”

Section: Introductionmentioning

confidence: 99%

Assessing the suitability of chemical ameliorants for reducing bio-availability of heavy metals in bulk fly ash contaminated soil

Mandal

Mukherjee

Saha

et al. 2021

Preprint

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In-situ rehabilitation of fly ash at dumping sites has been rarely addressed for crop production due to growth-related constraints, largely of heavy metal (HM) contamination in soils and crops. Current communication deals with a novel approach to identify a suitable management option for rejuvenating the contaminated soils. In this background, a 60-days incubation experiment was conducted with different fly ash-soil mixtures (50 + 50%, A1; 75 + 25%, A2; 100 + 0%, A3) along with four ameliorants, namely, lime (T1), sodium sulphide (T2), di-ammonium phosphate (T3), and humic acid (T4) at 30 ± 2 0 C to assess the ability of different fly ash-soil-ameliorant mixtures in reducing bio-availability of HMs. DTPA-extractable bio-available HM contents for lead (Pb), cadmium (Cd), nickel (Ni), and chromium (Cr) and their respective ratios to total HM contents under the influence of different treatments were estimated at different stages of incubation. Further, the ecotoxicological impact of different treatments on soil microbial properties was studied. A1T1 significantly recorded the lowest bio-availability of HMs (~ 49–233% lower) followed by A2T1 (~ 35–133%) among the treatments. The principle component analysis also confirmed the superiority of A1T1 and A2T1 in this regard. Further, A1T1 achieved low contamination factor and ecological risk with substantial microbial biomass carbon load and dehydrogenase activity. Thus, liming to fly ash-soil mixture at 50:50 may be considered as the best management option for ameliorating metal toxicity. This technology may guide thermal power plants to provide the necessary package of practices for the stakeholders to revive their contaminated lands for better environmental sustainability.

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Remediation of Fly Ash Dumpsites Through Bioenergy Crop Plantation and Generation: A Review

Cited by 38 publications

References 105 publications

Ecological restoration of fly‐ash disposal areas: Challenges and opportunities

Ecological restoration of fly‐ash disposal areas: Challenges and opportunities

Making light work of heavy metal contamination: the potential for coupling bioremediation with bioenergy production

Assessing the suitability of chemical ameliorants for reducing bio-availability of heavy metals in bulk fly ash contaminated soil

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