Fly ash application on two acid soils and its effect on soil salinity, pH, B, P and on ryegrass growth and composition

Matsi, Theodora; Keramidas, V. Z.

doi:10.1016/s0269-7491(98)00145-6

Cited by 112 publications

(47 citation statements)

References 19 publications

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“…For example, about 20% of the fly ash generated is being used in concrete production. Other uses include soil amelioration [4][5][6], ceramic industry [7][8][9], catalysis and support for catalysis [10][11][12][13], adsorbents for removal of various pollutants [14], depth separation [15][16][17], zeolite synthesis [18][19][20] and valuable metals recovery [21][22][23]. The global average utilization rate of fly ash is estimated to be nearly 25% [24].…”

Section: Introductionmentioning

confidence: 99%

A review of the alumina recovery from coal fly ash, with a focus in China

Yao

Xia

Sarker

et al. 2014

Fuel

315

117

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Coal fly ash, an industrial by-product, is derived from coal combustion in thermal power plants. It is one of the most complex and abundant of anthropogenic materials, and its improper disposal has become an environmental concern and resulted in a waste of recoverable resources. Coal fly ash is rich in alumina, making it a potential substitute for bauxite. With the diminishing reserves of bauxite resources as well as the increasing demand for alumina, recovering alumina from fly ash has attracted extensive attentions. The present review first describes the alumina recovery history and technologies, and then focuses on the recovery status in China. Finally, the current status of fly ash recycling and directions for future research are considered.

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Section: Introductionmentioning

confidence: 99%

A review of the alumina recovery from coal fly ash, with a focus in China

Yao

Xia

Sarker

et al. 2014

Fuel

315

117

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“…Such strongly alkaline pH is proof of the high reactivity of ashes, and therefore great care should be taken when applying them to soils, particularly those characterized by weak buffering properties. Some agrochemical opportunities derived from the application of ashes have been outlined (Matsi, Keramidas 1999;Stevens, Dunn 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Several remediation methods have been applied under in-situ (Matsi, Keramidas 1999;McGowen 2000;Oste et al 2002) as well as ex-situ (Tandy et al 2004;Diatta, Chudzinska 2009) conditions to soils anthropogenically contaminated with various contaminants. Additives, among others zeolites (Querol et al 2005) and clay minerals (Lombi et al 2003), were also applied to soils for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Heavy Metals Inactivation in Contaminated Soil by Coal Fly and Bottom Ashes

Diatta

Fojcik²,

Drobek

et al. 2017

Mineralogia

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Abstract. The study compared coal fly and bottom ashes for their ability to inactivate metals and lead to soil remediation. Soil was artificially contaminated with Cu, Zn, Pb and Cd at five degrees. Next, both ashes were added at five rates: 0, 0.5, 1.0, 1.5 and 2.0% and all treatments incubated. Data showed that for moderately contaminated soils, ash rates of 0.5 -1.0% were efficient from 40 to 70% for Zn and Cd, and raised markedly to between 70 and 93% for Cu and Pb. For extremely contaminated soils, the rates of ashes at 1.0, 1.5 and 2% were much more efficient (60 -80%). The use of fly and bottom ashes for metal inactivation and soil remediation should give greater consideration to the effect of pH and the type of heavy metals than the content of SiO2 and Al2O3. Fly ash displayed superior inactivation and remediation effects to the bottom ash.

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“…Alkaline CFA can be used to neutralize acidity and raise pH of acidic soils (Skousen et al, 2013). For example, the application of weathered alkaline CFA (pH 8.5e8.9) to an acidic soil increased its pH from 4.7 to 7.7, proportionally to the CFA application rate (Matsi and Keramidas, 1999). The highest pH value was obtained with a rate of 50 g CFA kg À1 soil (5%).…”

Section: Chemical Propertiesmentioning

confidence: 99%

“…Electrical conductivity (EC) is another important property of agricultural soils in terms of its effect on plant growth. Since CFA is rich in soluble salts, usually its soil application increases soil EC (Matsi and Keramidas, 1999;Tsadilas et al, 2009a,b), which can be undesirable. However, in some cases soil EC decreased following CFA application (e.g.…”

Section: Chemical Propertiesmentioning

confidence: 99%