Reuse of Woody Biomass Fly Ash in Cement-Based Materials: Leaching Tests

Berra, M.; Casa, G. De; Dell’Orso, Marcello; Galeotti, L.; Mangialardi, T.; Paolini, A; Piga, L.

doi:10.1007/978-3-642-19354-5_10

Cited by 7 publications

(10 citation statements)

References 3 publications

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“…The initial leaching that occurs on the outer surface of the monolithic sample causes the initially larger concentration values. Over time, the heavy metals leaching occurs due to the diffusion of the heavy metals ions from the cement matrix, which was observed after the 8th time step of the testing and agrees with [66]. In most cases, the heavy metals leaching became insignificant after long-term submersion [82].…”

Section: Leaching From the Monolithic Cement Samplessupporting

confidence: 57%

“…As clearly demonstrated, all the heavy metals concentrations of the chosen WBAs were higher than those of the cement except for Sr. Comparing the heavy metals concentrations of the studied WBAs with those of bottom WBAs [7,8,56,57,[66][67][68][69], the Cd and Co concentrations are visibly higher for all three samples of tested fly WBAs. For testing the monolithic samples using the dynamic surface leaching test (DSLT) method, CEM I 42.5 R cement, water, and the selected WBAs from the different plants replaced 15% of the cement per the EN 197-1 [70] standard.…”

Section: Methodsmentioning

confidence: 99%

“…Significantly more time must elapse before the metal from the interior part of the sample is released to the external environment, due to slowed diffusion, the effect of the metals bonding to hydration products, and the reduced leaching of the majority of the heavy metals given the high pH value of the sample interior [83][84][85][86][87]. Stronger initial leaching of the heavy metals from monolithic samples containing WBA was observed by [66], and the authors suggested that the heavy metals leaching was probably caused by the diffusion of heavy metal ions from the cement matrix. Surface leaching, dissolution, and diffusion are the three dominant mechanisms for releasing heavy metals from the cement matrix [88].…”

Section: Leaching From the Monolithic Cement Samplesmentioning

confidence: 99%

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Leaching Characteristics of Wood Biomass Fly Ash Cement Composites

Carević

Štirmer

Trkmić³

et al. 2020

Applied Sciences

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Wood biomass ash (WBA) represents an environmental and economic problem for energy producers, and there have been extensive studies of using WBA as a raw material in construction products. This study investigates the leaching characteristics of WBA cement composites based on testing results. Currently, 70% of WBA is landfilled, and the rest is primarily used in agriculture; therefore, this study also addresses the leaching as a component of environmental safety of these two primary WBA management approaches. An analysis of the leaching characteristics of WBA, monolithic, and crushed cement composites is performed by replacing 15% of the cement with WBA. The study was conducted using three WBA samples collected from different power plants. Increased values of leaching from the WBA itself are indicative of potential issues that could occur in the case of its disposal. The study concluded that the WBA could be potentially environmentally acceptable as a raw material in the concrete industry because the heavy metals are stabilized within the cement matrix.

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Section: Leaching From the Monolithic Cement Samplessupporting

confidence: 57%

Section: Methodsmentioning

confidence: 99%

Section: Leaching From the Monolithic Cement Samplesmentioning

confidence: 99%

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Leaching Characteristics of Wood Biomass Fly Ash Cement Composites

Carević

Štirmer

Trkmić³

et al. 2020

Applied Sciences

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“…Future trends of using biomass to produce energy suggest that the amount of WBA will have doubled by the year 2020, while an annual increase in production to 15.5 ×10 6 tonnes of biomass ash is possible in EU member countries [33]. It should also be noted that the current practice of WBA disposal in Europe causes material losses, and that it represents an additional environmental issue [43,[47][48][49]. Since WBA is rich in nutrients, it is regularly used for fertilisation and soil improvement in Austria, Sweden, Finland, Denmark, and Germany [32].…”

Section: Estimated Amounts and Current Application Of Wba In Worldmentioning

confidence: 99%

Wood biomass ash as a raw material in concrete industry

Lakušić¹

2019

JCE

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Wood biomass ash as a raw material in concrete industry The trend of wood biomass use as a renewable energy source has contributed to an increase in the quantity of wood biomass ash (WBA) that is regarded as waste. Currently, 70 % of WBA is landfilled, 20 % is used in agriculture, and 10 % is used for other purposes. The aim of this paper is to carry out an extensive analysis of the current situation regarding WBA production in Croatia and other European countries. An overview of the types and properties of WBA in relation to the type of wood biomass is given, and parameters relevant for WBA use in concrete industry are presented.

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“…These directions are summarized in the table below (Table 1). [7,24,25,26] Construction [12,15,17,20,23] Material production [11,12,13,14,15] Water treatment [18,19,32 It can be seen that in the solid fossil fuel ash composition prevail silicon, aluminum, iron, while the biomass ash composition is characterized mainly with calcium, potassium, magnesium. Wood ashes observed significantly lower content of heavy metals [8,9,22].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Biomass Ash Properties for Their Utilization Assesment

Noviks

2015

ETR

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Ash is a mineral waste group, which quantity increases on a global scale and now it has achieved hundreds of millions of tons, and as they are an integral part of the any solid fuel, including biomass the production rate will continue. At the same time ash, due to their nature and composition is a unique material that can be valuable technogenic resource. The paper studies the wood ash physical properties (density, porosity, specific free surface) composition and the metal adsorption ability. It was found that wood ash contains a significant percentage of metals in the mobile phase, which dissolve in the water and thus are able to spread into the surrounding soil. The study established a high adsorption activity of ash (95-99%) to the metals. It was found that the adsorption capacity of the ash is possible to increase with the activation of the ash particle surfaces and changing the pore structure.

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Reuse of Woody Biomass Fly Ash in Cement-Based Materials: Leaching Tests

Cited by 7 publications

References 3 publications

Leaching Characteristics of Wood Biomass Fly Ash Cement Composites

Leaching Characteristics of Wood Biomass Fly Ash Cement Composites

Wood biomass ash as a raw material in concrete industry

Investigation of Biomass Ash Properties for Their Utilization Assesment

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