Comparison between different leaching tests for the evaluation of metal release from fly ash

Brunori, Claudia; Balzamo, Stefania; Morabito, Roberto

doi:10.1007/s002160100988

Cited by 29 publications

(26 citation statements)

References 2 publications

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“…In the case of Pb, the slightly elevated recovery is probably due to contamination. This has also been reported for Pb by Brunori et al (2001) in reference material NBS SRM 1633a (Coal Fly Ash). The precision (repeatability) of the total leaching procedure for reference material SRM 1633b (Coal Fly Ash) was evaluated from results of three repetitions of the leaching procedure: relative standard deviations, i.e.…”

Section: Sequential Leaching Of the Reference Materialssupporting

confidence: 81%

Leachability of metals in fly ash from a pulp and paper mill complex and environmental risk characterisation for eco-efficient utilization of the fly ash as a fertilizer

Pöykiö

Nurmesniemi

Perämäki

et al. 2005

Chemical Speciation & Bioavailability

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Section: Sequential Leaching Of the Reference Materialssupporting

confidence: 81%

Leachability of metals in fly ash from a pulp and paper mill complex and environmental risk characterisation for eco-efficient utilization of the fly ash as a fertilizer

Pöykiö

Nurmesniemi

Perämäki

et al. 2005

Chemical Speciation & Bioavailability

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“…Overall matrix of the sample is yet another control on the leachate composition. For instance, Cr was reported to be the least extractable element -more than 20 % was never extracted due to matrix effect (Brunori et al, 2001). Even when the total vol.…”

Section: Factors Affecting Composition Of Leachatesmentioning

confidence: 99%

“…Many testing procedures have been developed to simulate the leaching process of hazardous wastes in landfill or natural environments in order to evaluate the possibility of human health hazard threats by such wastes (Brunori et al, 2001;Chang et al, 2001), because the potential risk of heavy metals in solid waste, with respect to their mobility and ecotoxicological significance, is determined by their solid-solution partitioning rather than the total heavy metal content. Among various factors affecting leaching of metals from fly ash, pH and temperature might play major roles in leaching of metals.…”

Section: Introductionmentioning

confidence: 99%

Temperature and pH Dependence of Some Metals Leaching from Fly Ash of Municipal Solid Waste

Gupta¹,

Kawahata²,

Takeuchi³

et al. 2005

Resource Geology

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Abstract. Municipal solid waste combustion leads to concentration of various metals in the solid residue (fly ash) remaining after combustion. These metals pose serious environmental hazard and require proper handling and monitoring in order to control their harmful effects. Leachability of some metals from fly ash was examined in fly ash and Milli‐Q water mixture (liquid‐to‐solid ratio, 100) under various temperature and pH conditions in the laboratory. The leaching experiments conducted for 24 hours showed that pH was generally more important than temperature in controlling the amount of metals leached out of the fly ash. However, at a given pH, rise in temperature led to different degree of (usually one to two fold) enhanced or reduced leaching of metals. Owing to amphoteric nature of oxides of Al, Cr, Pb and Zn, these metals often yielded typical pattern of increase and decrease in their concentrations with change in pH. The extent of leaching of Cr and Pb in our experiments suggests that decrease of pH to acidic range in the case of Pb and to neutral to acidic range for Cr over a long period of storage of fly ash at solid waste dumping site may facilitate leaching of these metals from fly ash, leading to contamination of groundwater to the level that exceeds beyond the level permitted by the environmental laws.

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“…These components act as toxic materials in environment when they are released by water. Therefore, many studies have been focused to prevent or reduce the release of them to environment (Brunori et al, 2001;Dell'Orso et al, 2012;Napia et al, 2012). Additionally, the alkali leaching from concrete by contacting water is most serious inorganic …”

Section: Culturing Of D Magnamentioning

confidence: 99%

Evaluation of Daphniamagna for the Ecotoxicity Assessment of Alkali Leachate from Concrete

Choi¹,

Bae²,

Shin³

et al. 2013

International Journal of Industrial Entomology

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The cladoceran Daphniamagna has been used as an aquatic test species in aquatic toxicology. To evaluate the aquatic toxicity of leachate from concrete, the immobilization of D. magna was observed after treatment of various concentrations of leachate specimens. Reliabilities of the culture condition and the experimental protocol for acute toxicity test were successfully achieved from the standard toxicity test. The leachates were prepared from the mixture of Ordinary Portland Cement (OPC) and pozzolanic admixtures, Pulverised fuel ash (PFA), Ground granulated blast furnace slag (GGBS) and GGBS containing loess. Acute toxicity test showed 100% immobilization of D. magna for OPC or PFA. The leachates from OPC or PFA had high pH 10 to 12. However, GGBS and GGBS containing loess showed less toxicity according to the concentrations. Especially, immobilization was not observed at the concentrations below 12.5% of GGBS containing loess. Also the range of pH for these specimens was 8 to 9. This suggested that the use of loess as the admixture in concrete may be useful to reduce eco-toxicity of leachates from concrete. This our study provided the harmfulness of the alkali leaching from concrete in aquatic environment and the usefulness of D. magna to evaluate the toxicity of leachates from concrete. IntroductionThe detection and presence of toxic materials in environment is one of the most popular interests because of their harmful effects on ecosystem including human. Especially, the presence of toxic materials in aquatic environment is more considerable to evaluate the harmfulness. The evaluation of contamination in aquatic environment has been for a long time performed only by specific chemical analyses, but many experiences and studies have shown the inadequacy of such approach. To complement this chemical analysis, the biological methods using fish or algae have been used to evaluate and monitor the water quality for many years (Sandbacka et al., 2000;Versteeg et al., 1997 component, but its assessment for environment has not been studied yet. The alkali leaching is not only problem to architectural structures but also more serious to the construction of bridges, dams and other offshore structures (Van Gerven et al., 2007;Mohamed and El Gamal, 2011). The purpose of this study, therefore, was to evaluate the usage of eco-toxicity assays with D. magna in water contaminated with alkali leaching of concrete. To reduce toxicity, in additionally, the effect of loess as the eco-friend admixture was evaluated. Materials and Methods Culturing of D. magnaDaphniamagna was obtained from Korea Envicladoceran Daphniamagna Straus has been used as a "standard" aquatic test species among cladoceran and most frequently used for chronic and acute tests in aquatic toxicology (ASTM, 1987; EEC, 1992;OECD, 1992). Many countries are using aquatic toxicity tests as part of their water quality monitoring program (Slabbert and Venter, 1999). In Korea also, the D. magna has been used for the assessment of toxicity in aquatic environment from 2...

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Comparison between different leaching tests for the evaluation of metal release from fly ash

Cited by 29 publications

References 2 publications

Leachability of metals in fly ash from a pulp and paper mill complex and environmental risk characterisation for eco-efficient utilization of the fly ash as a fertilizer

Leachability of metals in fly ash from a pulp and paper mill complex and environmental risk characterisation for eco-efficient utilization of the fly ash as a fertilizer

Temperature and pH Dependence of Some Metals Leaching from Fly Ash of Municipal Solid Waste

Evaluation of Daphniamagna for the Ecotoxicity Assessment of Alkali Leachate from Concrete

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