Adsorption Properties of Rice Hull Charcoal for Cesium and Strontium in Aqueous Solution

Kobayashi, Shinya; Noda, Kosuke; Shibata, Hirohumi; Matsubara, Soichiro; Kawamura, Norihisa; Nonami, Toru

doi:10.2472/jsms.67.903

Cited by 4 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At present, there are few effective utilization methods for rice husks, and various research institutes are actively conducting the research on utilization methods for rice husks. As an example, it is described that rice husk charcoal has adsorption performance for cesium (Cs) and strontium (Sr) in aqueous solution (Kobayashi et al [8]). In addition, it is reported that the rice husk ash has an adsorption ability for divalent heavy metal ions such as lead (Pb), mercury (Hg), zinc (Zn), copper (Cu), nickel (Ni) and cadmium (Cd) as shown in [9][10][11][12].…”

Section: Rice Husk Preparationmentioning

confidence: 99%

Study on Adsorption of Heavy Metals by Rice Husk and Extraction of Heavy Metals Adsorbed in Rice Husk

Yanaka

Shibata

Matsumoto

et al. 2021

GEOMATE

View full text Add to dashboard Cite

Heavy metals with strong toxicity are often contained in mine drainage from the suspended or abandoned mines where mining activities were once conducted. The mine drainage continues to flow semipermanently. Thus the treatment of mine drainage must be continued. As the current treatment method for the mine drainage treatment, the neutralization treatment process utilizing alkali chemicals is mainly conducted. However, few alkali chemicals satisfy both low cost and high neutralizing ability. In addition, regarding the neutralized deposits generated during the treatment of mine drainage, it is difficult to secure the disposal sites. Moreover, in recent years, the metal demand has increased in IC chips and parts for electric vehicles. Thus, focusing on the rice husk which is an industrial waste, the purposes of this study are to verify the adsorption performance of rice husks for heavy metals and to verify whether the extraction of heavy metals from rice husks to which heavy metals are adsorbed is possible or not. In this study, the following two tests are carried out: The adsorption test of rice husk for heavy metals and the extraction test with acid from the rice husk which absorbs the heavy metals. From the test results, the adsorption isotherms of Zn, Cu and Cd on the rice husks are described from the adsorption tests, and the adsorption states of Zn, Cu and Cd on the rice husks are discussed. Furthermore, it is proved to be possible to extract them from the rice husks which adsorbs such heavy metals.

show abstract

Section: Rice Husk Preparationmentioning

confidence: 99%

Study on Adsorption of Heavy Metals by Rice Husk and Extraction of Heavy Metals Adsorbed in Rice Husk

Yanaka

Shibata

Matsumoto

et al. 2021

GEOMATE

View full text Add to dashboard Cite

show abstract

“…In addition, according to the pore distribution measurements, the mesopore volume of rice hull charcoal carbonized at 400 °C were slightly increased by the alkali treatment. According to Kobayashi et al 4) , there is a correlation between the mesopore volume and the cesium and strontium adsorption amounts. Furthermore, in this study, the increase in mesopores may have improved the adsorption amount after alkali treatment.…”

Section: Cesium/strontium Adsorption Experimentsmentioning

confidence: 99%

Adsorption of Cesium and Strontium Ions by Alkali-Treated Rice Hull Charcoal

Koyanagi

Furuta

Takeuchi

et al. 2019

Trans. Mat. Res. Soc. Japan

View full text Add to dashboard Cite

This paper has investigated the influence of alkali treatment on the acidic functional groups of rice hull charcoal and investigated the relationship between its cesium and strontium adsorption ability. In the alkali treatment, rice hull charcoal carbonized from 400 to 1000 °C was immersed in a basic aqueous solution. The pH of the rice hull charcoal increased after alkali treatment. Furthermore, the alkali treatment of rice hull charcoal carbonized at 400 and 600 °C increased the adsorption of cesium and strontium. In the FTIR results, the OH band of alkali-treated rice hull charcoal was stronger than that of the untreated rice hull charcoal. The mesopore volume of alkali-treated rice hull charcoal increased. The alkali-treated rice hull charcoal showed an increased pH, increased negative charge, and cleaved lactone rings contained compared to the untreated sample. In addition, the valence of acidic functional groups increased, and the adsorption ability of cesium and strontium improved.

show abstract

“…Kobayashi et al reported that rice hull charcoal has adsorption capacity for cesium and strontium in aqueous solution 2 .…”

Section: Introductionmentioning

confidence: 99%

Reduction in Weight of Rice Hull Charcoal with Adsorbed Cesium and Strontium <i>Transactions of the Materials Research Society of Japan</i>

Takada

Furuta

Nonami

2020

Trans. Mat. Res. Soc. Japan

View full text Add to dashboard Cite

The reduction in weight of rice hull charcoal with adsorbed cesium and strontium was examined in this study. It was carefully examined whether the adsorbed cesium and strontium volatilized during the weight loss process. By heating the charcoal that had adsorbed cesium and strontium to 400 °C in air, we achieved a weight reduction of approximately 28%. The amount of cesium and strontium present in the gas that volatilized during heating was quantified. The value obtained was below the detection limit of the atomic absorption spectrometer. From the obtained results, it was found that rice hull charcoal with adsorbed cesium and strontium can undergo weight reduction on being heated, without volatilizing the adsorbed metal.

show abstract

Adsorption Properties of Rice Hull Charcoal for Cesium and Strontium in Aqueous Solution

Cited by 4 publications

References 10 publications

Study on Adsorption of Heavy Metals by Rice Husk and Extraction of Heavy Metals Adsorbed in Rice Husk

Study on Adsorption of Heavy Metals by Rice Husk and Extraction of Heavy Metals Adsorbed in Rice Husk

Adsorption of Cesium and Strontium Ions by Alkali-Treated Rice Hull Charcoal

Reduction in Weight of Rice Hull Charcoal with Adsorbed Cesium and Strontium <i>Transactions of the Materials Research Society of Japan</i>

Contact Info

Product

Resources

About