Precipitation of heavy metals from coal ash leachate using biogenic hydrogen sulfide generated from FGD gypsum

Jayaranjan, Madawala Liyanage Duminda; Annachhatre, Ajit P.

doi:10.2166/wst.2012.546

Cited by 22 publications

(6 citation statements)

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“…Due to the large volume of waste material, the large quantity of fly ash will be considerable disposal concern because of the increase requirement for ash storage space. Hence, this will increase the expanses to obtain larger area (Jayaranjan and Annachhatre, 2013) and it could lead to the environmental problem to the future (Abdullah and Fazlul, 2014). Table 1 shows that FA has about 6.8% of silicon element and the list compounds that exist in fly ash.…”

Section: Fly Ash Raw Materialsmentioning

confidence: 99%

Treatment Fly Ash of Al Musayyib Thermal Power Plant to Be Used as a Pozzolanic Material

2021

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Crude oil ash is the residue that is produced during oil combustion for instance fly ash, bottom ash or boiler slag which was primarily produced from the combustion of coal. With growth in oil burning power station, huge amount of fly ash considered as organic materials which are normally disposed in an on-site disposal system without any commercialization purpose.Previous researchers have studied the extraction of silica from agricultural wastes such as palm ash and rice husk ash (RHA) and FA (fly ash) by using leaching treatment method. In this study, the weaker acid, citric acid solution was used to replace the strong acid in leaching treatment to process. Result showed that the loss on ignition materials can be decrease to 12%. Meanwhile the silica can be extracted up to 54.4% from FA using citric acid leaching treatment under the optimum reaction time of 60 minutes with solution temperature of 60°C and concentration of citric acid 5% receded by gradual combustion at 900°C for 3 hours.

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Section: Fly Ash Raw Materialsmentioning

confidence: 99%

Treatment Fly Ash of Al Musayyib Thermal Power Plant to Be Used as a Pozzolanic Material

2021

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“…Due to the large volume of waste material, the large quantity of coal ash will be considerable disposal concern because of the increase requirement for ash storage space. Hence, this will increase the expanses to obtain larger area [13,14] and it could lead to the environmental problem to the future [7]. Table 1 shows that CBA has about 41% of silicon element and the list heavy metal element that exist in coal bottom ash.…”

Section: Materials: Coal Bottom Ashmentioning

confidence: 99%

Reducing Heavy Metal Element from Coal Bottom Ash by Using Citric Acid Leaching Treatment

et al. 2017

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Abstract. Coal ash is the residue that is produced during coal combustion for instance fly ash, bottom ash or boiler slag which was primarily produced from the combustion of coal. With growth in coal burning power station, huge amount of coal bottom ash (CBA) considered as hazardous material which are normally disposed in an on-site disposal system without any commercialization purpose. Previous researchers have studied the extraction of silica from agricultural wastes such as palm ash and rice husk ash (RHA) and CBA by using leaching treatment method. In this study, the weaker acid, citric acid solution was used to replace the strong acid in leaching treatment process. Result showed that the heavy metal content such as Copper (Cu), Zinc (Zn) and Lead (Pb) can be decrease. Meanwhile the silica can be extracted up to 44% from coal bottom ash using citric acid leaching treatment under the optimum reaction time of 60 minutes with solution temperature of 60 0 C and concentration of citric acid more than 2%.

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“…Coal ash waste could be potentially hazardous to the environment since it contains heavy metals such as Zn, Pb, Mn, Cu, Cr, Cd, and Se, according to previous studies. Lead (Pb), arsenic (As), nickel (Ni), selenium (Se), copper (Cu), zinc (Zn), chromium (Cr), cadmium (Cd), and manganese (Mn) are just some of the metalloids and heavy metals that can be established in bottom ash and y ash (Dinçer et al, 2007;Pandey et al, 2011;Su and Wang, 2011;Jayaranjan and Annachhatre, 2013). Metals like Cd, As, and Pb can be harmful if they leach into the water, and this is especially true if the water is acidic.…”

Section: Introductionmentioning

confidence: 99%

Contamination Analysis of Coal Ash and Treated Marine Clay

Jamaludin

Yunus

Jusoh

et al. 2023

Preprint

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The production of coal ash waste is rising alongside the need for power. Therefore, it is necessary to reuse coal ash waste. However, it is unclear if coal ash is genuinely safe for the environment. In this study, coal ash waste and treated marine clay will be subjected to toxicity characteristic leaching to determine the ground contamination caused by coal ash, cement, and marine clay stabilisation. Using the US Department of Environmental (DoE) standard, all three samples of bottom ash, fly ash and treated marine clay (15% 50BA:50FA) showed values below DoE regulatory limits, with the treated sample having the lowest. Using the Malaysian Water Standard, it was determined that the quantities of Cd, Se, and Ag in all three samples were within the regulatory limits established by the Malaysian Water Standard. Except for Cr and Hg, the concentrations of elements identified in the treated 15% 50BA:50FA sample were all within regulatory limits. In descending order, the trend of heavy metal leaching was Ba > Hg > Cr > As > Pb > Ag > Cd > Se, with Ba leaching the most. According to the U.S. Department of Environmental Protection, coal ash and stabilised marine clay are deemed environmentally safe (DoE). For the Malaysian Water Standard, however, water leached from treated marine clays could not be consumed directly. It must be processed before being supplied to consumers.

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Precipitation of heavy metals from coal ash leachate using biogenic hydrogen sulfide generated from FGD gypsum

Cited by 22 publications

References 0 publications

Treatment Fly Ash of Al Musayyib Thermal Power Plant to Be Used as a Pozzolanic Material

Treatment Fly Ash of Al Musayyib Thermal Power Plant to Be Used as a Pozzolanic Material

Reducing Heavy Metal Element from Coal Bottom Ash by Using Citric Acid Leaching Treatment

Contamination Analysis of Coal Ash and Treated Marine Clay

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