Characterization of soluble and insoluble radioactive cesium in municipal solid waste incineration fly ash

Ohbuchi, Atsushi; Fujii, Kengo; Kasari, Miki; Koike, Yuya

doi:10.1016/j.chemosphere.2020.126007

Cited by 11 publications

(9 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the r-Cs leaching rate tended to be higher for FA and TFA than for BA, regardless of the season. Different forms of r-Cs may have caused the differences in the r-Cs leaching rates [21,29,30]. According to previous studies, the leaching rates of r-Cs from ash generated during incineration of decontamination waste or sewage sludge are not typically high [8,[36][37][38], which disagrees with our results for MSW incineration ash.…”

Section: Concentration and Leaching Properties Of R-cs In Msw Incineration Ashcontrasting

confidence: 98%

“…The water content of the ash samples was determined using an air oven drying method and is also shown in Tables 1 and 2. Cs is a volatile element [27,28] that can appear in BA, FA, and TFA in different forms [21,29,30]. Most r-Cs enters MSW incineration facilities via vegetation and soil and is volatilized into a gaseous state during incineration, thereby migrating into the flue gas [31].…”

Section: Concentration and Leaching Properties Of R-cs In Msw Incineration Ashmentioning

confidence: 99%

“…r-Cs cools near the baghouse filter, which is controlled at approximately 200 • C, and then solidifies and concentrates in the FA and TFA [8]. Therefore, Cs can exist in FA and TFA in the form of highly water-soluble CsCl [29,30], CsOH, and Cs 2 SO 4 [32,33].…”

Section: Concentration and Leaching Properties Of R-cs In Msw Incineration Ashmentioning

confidence: 99%

See 2 more Smart Citations

Use of Clay Minerals to Control Radioactive Cesium Leaching from Municipal Solid Waste Incineration Ash in Fukushima Prefecture in Summer and Winter

Murasawa

Hatta

2021

Pollutants

View full text Add to dashboard Cite

Radioactive cesium (r-Cs) released from the 2011 Fukushima Daiichi Nuclear Power Plant attaches to vegetation/soil and is collected as municipal solid waste (MSW) for incineration, being concentrated in incineration ash (bottom ash [BA], fly ash [FA], and chelate-treated FA [TFA]). r-Cs in FA and TFA can easily leach upon contact with moisture. It is important to prevent further contamination, as r-Cs has negative effects on ecosystems and the human body. Naturally available clay minerals, considered effective for capturing r-Cs, are a good alternative. Here, we sampled ash from MSW incineration facilities in Fukushima in August 2016 and February 2017. We used energy dispersive X-ray fluorescence spectroscopy and Ge semiconductor detector to determine elemental composition and r-Cs concentration in the samples and conducted leaching tests. We also determined the extent of leaching suppression by zeolite, acidic clay, and vermiculite. Chloride contents and r-Cs leaching rates were higher in FA and TFA than in BA, regardless of the season. Prior direct addition and mixing of clay minerals (5 to 20 wt.%) effectively prevented r-Cs leaching. This study is the first to examine r-Cs leaching inhibition by clay mineral direct addition and mixing to MSW incineration ash.

show abstract

Section: Concentration and Leaching Properties Of R-cs In Msw Incineration Ashcontrasting

confidence: 98%

Section: Concentration and Leaching Properties Of R-cs In Msw Incineration Ashmentioning

confidence: 99%

See 1 more Smart Citation

Use of Clay Minerals to Control Radioactive Cesium Leaching from Municipal Solid Waste Incineration Ash in Fukushima Prefecture in Summer and Winter

Murasawa

Hatta

2021

Pollutants

View full text Add to dashboard Cite

show abstract

“…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%

“…13 (JLT-13) was carried out to evaluate the distribution of water-soluble forms. 14 Ohbuchi et al 15 reported that radioactive Cs in MSWI fly ash was separated into soluble and insoluble forms.…”

Section: Introductionmentioning

confidence: 99%

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

Elution control of radioactive cesium in MSWI fly ash using water repellent treatment

Ogawa

Amano

Koike

2020

J Mater Cycles Waste Manag

View full text Add to dashboard Cite

Characterization of soluble and insoluble radioactive cesium in municipal solid waste incineration fly ash

Cited by 11 publications

References 27 publications

Use of Clay Minerals to Control Radioactive Cesium Leaching from Municipal Solid Waste Incineration Ash in Fukushima Prefecture in Summer and Winter

Use of Clay Minerals to Control Radioactive Cesium Leaching from Municipal Solid Waste Incineration Ash in Fukushima Prefecture in Summer and Winter

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

Elution control of radioactive cesium in MSWI fly ash using water repellent treatment

Contact Info

Product

Resources

About