Characterization of thermal power-plant fly ash for agronomic purposes and to identify pollution hazards

Sikka, R.; Kansal, B.

doi:10.1016/0960-8524(94)90101-5

Cited by 34 publications

(11 citation statements)

References 7 publications

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“…Some authors studied the properties of soils after amendment with ash (Aitken et al, 1984;Sikka and Kansal, 1994;Desmukh et al, 2000;Grewal et al, 2001;Kalra et al, 2003). When alkaline, fly ash can be added to increase the pH of acidic soils; it can also act as a soil modifier to upgrade the physical properties and improve the texture, upgrade the chemical and biological quality of soil (increase in cation exchange capacity, capacity of water retention, nutrient availability) and thus participate in the optimization of plant growth (Chang et al, 1977;Phung et al, 1979;El-Mogazi et al, 2001).…”

Section: Introductionmentioning

confidence: 97%

Changes in soil properties in a fluvisol (calcaric) amended with coal fly ash

et al. 2010

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International audienceFluidized bed combustion ash (FBC) is a by-product from coal-fired power stations used for many decades in concrete, cement and brick manufacturing and more recently for trace metal immobilization and pesticide retention in soils. Moreover FBC ash has been recommended by some authors as a soil amendment in agriculture for its nutrient supply. In this study silico-aluminous (SiAl) and sulfo-calcic (SCa) fly ashes have been added to a fluvisol (calcaric) sampled in the Rhine River plain (Germany) in order to investigate the physical, chemical and physico-chemical possible modifications of the amended soil. Earthworms were introduced into microcosms hydrated with a solution of water and CaCl2 (3.7 10− 4 mg/L; pH = 6.2) and stabilized during 7 and 14 weeks. Batch leaching tests were performed during 6 weeks on the amended soil in order to obtain data on the mobilization potential of major elements (NH4+, Na+, K+, Mg2+, Cl−, Ca2+, NO3−, SO42−, PO43−, H4SiO4) and trace elements (Sr, Ba, V, Zn, Cu, Co, As, Ni, Mo, Cr, Cd, Pb) during ash–soil–water interactions. The main modification is an increase in pH (≈ 12) of soil water in soil amended with sulfo-calcic ash, whereas soil pH only slightly changes in the other soil as compared to control soil. This alkaline pH causes a strong mortality of the macrofauna and a higher mobility of Co, Ni and V on the contrary to Cr, Cu, Pb and Zn which are less mobile and more strongly retained by soil. Soil physico-chemical properties remain generally similar to control soil in soil amended with silico-aluminous ash (SiAl) but show major differences in the case of soil amended with sulfo-calcic ash (SCa). The sulfo-calcic ash therefore seems less adapted to integration in soils from an agricultural and farming point of view, contrary to the silico-aluminous ash which increases the cation exchange capacity, thus improving the nutrient and water reserve for plants

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Section: Introductionmentioning

confidence: 97%

Changes in soil properties in a fluvisol (calcaric) amended with coal fly ash

et al. 2010

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“…pH was found to be alkaline for soil, distillery waste and farmyard manure whereas, fly ash had acidic pH of 6.09, therefore, the release of micronutrients was higher (Sikka and Kansal 1994). Low pH conditions tend to increase the mobility and create a reducing atmosphere for ions while alkalinity results in conversion of ions to hydroxyl ions followed by formation of insoluble hydroxides or oxides.…”

Section: Discussionmentioning

confidence: 88%

Impact of addition of soil amendments and microbial inoculants on nursery growth of Populus deltoides and Toona ciliata

Aggarwal

Goyal

2008

Agroforest Syst

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Present study evaluated growth of Populus deltoides G48 and Toona ciliata over a period of 6 months, in nursery soil amended with 10% fly ash (v/v), 5% distillery waste (v/v), 20% farmyard manure (v/v) and microbial consortium of Pseudomonas striata and Azotobacter sp. @ 30 ml/pot in different combinations leading to 12 different treatments with 16 replicates in completely randomized block design. Biometric parameters such as plant height, collar diameter and total dry biomass were analyzed which indicated that the treatment (T8) comprising of fly ash @ 10% (v/v), farmyard manure @ 20% (v/v) and microbial consortium @ 30 ml/pot promoted growth of P. deltoides. The results indicated that combined addition of fly ash, farm yard manure and microbial inoculants can be used as a good potting mixture for improving survival rates and plant growth in forestry nurseries.

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“…EC and the metal content of soil increase with increasing CFA application [63]. The enrichment of CFA in SA with several essential and non essential elements may give higher EC values in soil-SA mixtures compared to original red soil.…”

Section: Utilization Of Sa For Komatsuna Production In Red Soil As a mentioning

confidence: 94%

Recycling of Coal Fly Ash and Paper Waste to Improve Low Productive Red Soil in Okinawa, Japan

Jayasinghe

Tokashiki

Kinjo

2009

CLEAN Soil Air Water

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Coal fly ash (CFA) and paper waste (PW) related environmental problems and its recycling techniques have been a major challenge to society. Therefore, it is of crucial importance to develop new recycling methods for CFA and PW. This work proposes a potential new way of developing synthetic aggregates (SA) using CFA, PW, starch waste and ammonium sulfate (AS) as a granular nitrogen fertilizer medium, and their utilization as a soil amendment to improve crop production in the low productive acidic red soil of Okinawa, Japan. Three types of SA with three different nitrogen (N) percentages were produced and used to amend acidic red soil in a pot experiment for the cultivation of Komatsuna, which is also called as Japanese mustard spinach (Brassica rapa var. pervidis). SA had a low bulk density (0.58–0.62 g/cm3), high water holding capacity (0.60–0.64 kg/kg), high saturated hydraulic conductivity (2.34·10–2 cm/s), high mean weight diameter (MWD) (4.32–4.48 mm), alkaline pH (8.58–8.61), high electrical conductivity (EC) (82.18–84.35 mS/m) and high carbon (C) content (68.71–70.07 g/kg) in comparison with the acidic red soil. The trace element concentrations of the developed SA were below the maximum pollutant concentration of individual metals for land application of sewage sludge given by the US Environmental Protection Agency. Scanning electron microscopic (SEM) studies showed the higher structural surface area of SA, where round shaped CFA particles were embedded into the fibrous PW matrix. Incorporation of SA into the acidic red soil not only enhanced soil fertility but also improved the physical and chemical properties of the soil compared to soil without SA addition. SA addition to the acidic red soil significantly increased the growth and yield parameters of Komatsuna compared to soil without SA addition.

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Characterization of thermal power-plant fly ash for agronomic purposes and to identify pollution hazards

Cited by 34 publications

References 7 publications

Changes in soil properties in a fluvisol (calcaric) amended with coal fly ash

Changes in soil properties in a fluvisol (calcaric) amended with coal fly ash

Impact of addition of soil amendments and microbial inoculants on nursery growth of Populus deltoides and Toona ciliata

Recycling of Coal Fly Ash and Paper Waste to Improve Low Productive Red Soil in Okinawa, Japan

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