Speciation of the radioactive nuclides in incinerator fly ash of municipal solid waste using sequential extractions

Iwahana, Yuki; Ohbuchi, Atsushi; Koike, Yuya; Kitano, Masaru; Nakamura, Toshihiro

doi:10.1007/s10163-015-0408-5

Cited by 6 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One result of these efforts is that the incineration of municipal waste in Europe has doubled from 1995 to 2019 [4], although the long-term goal in Europe is the prevention and reduction of waste [3] rather than increasing waste incineration further. Previously there have been only a few studies of the radioactivity of waste incineration residues internationally [5][6][7][8], and no studies in Finland. Due to the levels of heavy metals in the residues [9,10] the beneficial use of waste incineration residues can be limited, but as advanced forms of reuse and recycling are developed, such as more efficient metals recovery [11], it is also important to investigate and document the levels of radionuclides in the residues.…”

Section: Introductionmentioning

confidence: 99%

Radioactivity of residues from waste incineration facilities in Finland

et al. 2023

View full text Add to dashboard Cite

Waste incineration in Europe has been increasing in the past few decades as there is a need to reduce the burden on landfills and their associated environmental concerns. While incineration reduces the volume of the waste, the volume of slag and ash are still substantial. To find out potential radiation risks that incineration residues could set to the workers or to the public, the levels of radioactive elements in the residues were investigated from 9 waste incineration plants in Finland. Natural and artificial radionuclides were detected in the residues, but in general the activity concentrations were low. This study shows that the level of Cs-137 in the fly ash from municipal waste incineration follows the pattern of 1986 fallout zones in Finland, although the levels are significantly lower than in ash from bioenergy production from the same areas. Am-241 was also detected in many samples, although the activity concentrations were very low. Based on the findings in this study, the typical ash and slag residues from municipal waste incineration do not need radiation protection measures to workers or the public even in regions which received up to 80 kBq/m² of Cs-137 fallout in 1986. The further use of these residues need not be restricted due to the radioactivity. Hazardous waste incineration residues and other special cases need to be considered separately, depending on the original waste composition.

show abstract

Section: Introductionmentioning

confidence: 99%

Radioactivity of residues from waste incineration facilities in Finland

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Moreover, the activity concentrations of 134 Cs and 137 Cs showed higher values than before the FDNPP accident. 11 The activity ratio of 134 Cs/ 137 Cs in Fukushima-derived radionuclides was reported as 1, and the behavior of 134 Cs was similar to that of 137 Cs. 9 The activity ratio of 134 Cs/ 137 Cs (4741 ± 92/5015 ± 48 Bq kg -1 ), which was decaycorrected on March 11, 2011 was determined as 1 in this study.…”

Section: Concentration Of Heavy Metals and Radioactive Csmentioning

confidence: 94%

“…17 This method has been employed for the speciation of both heavy metals and radionuclides. 11,13,21 Bunzl et al 21 reported on the speciation of 238 U, 226 Ra, 210 Pb, 228 Ra, and stable Pb in the soil from a uranium mine. The Tessier method was modified for this study to incorporate the following steps.…”

Section: Sequential Extraction Methodsmentioning

confidence: 99%

“…The activity concentrations of 40 K, 134 Cs, and 137 Cs were 2540 ± 130 Bq kg -1 , 882 ± 17 and 4470 ± 43 Bq kg -1 , respectively. Iwahana et al 11 reported that the activity concentration of 40 K in fly ash corresponded to the natural radionuclides before the FDNPP accident, ranging from 445 to 2600 Bq kg -1 . The activity concentration of 40 K in fly ash was found to be equivalent to the value before the FDNPP accident.…”

Section: Concentration Of Heavy Metals and Radioactive Csmentioning

confidence: 99%

“…Considerable research regarding the speciation of radionuclides, including radioactive Cs, in MSWI fly ash was reported. [9][10][11][12][13][14][15] The leaching behavior of heavy metals in addition to radioactive Cs in MSWI fly ash depends on their chemical state and physicochemical properties, such as the solubility. The particle size distribution determined via a dry sieving method, and the physicochemical properties of radioactive Cs and heavy metals in MSWI fly ash were investigated.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chemical State Analysis of Heavy Metals and Radioactive Cesium in Municipal Solid Waste Incineration Fly Ash Contaminated with Radioactive Cesium Released by the FDNPP Accident

et al. 2021

Self Cite

View full text Add to dashboard Cite

The chemical states of heavy metals and radioactive Cs were estimated in fly ash sampled at Fukushima prefecture, Japan. Estimating the speciation of incinerator fly ash is important to ensure an appropriate and efficient management of fly ash generated from disaster-related waste. In this study, fly ash collected at a waste incineration facility in Fukushima prefecture was treated using a sequential extraction test. The test results indicated that the solubility behavior of radioactive Cs was similar to that of NaCl and KCl, and approximately 60% of radioactive Cs was included as watersoluble chloride compounds in the fly ash sample. Most heavy metals eluted in three fractions, in the extraction steps for carbonate-bound, free oxide, and bound to organic matter species. The chemical states of elements in the three non-watersoluble fractions and residue showed minimal elution into the environment. Therefore, most heavy metals in the fly ash exhibited minimal elution into the environment.

show abstract