Reduction of Formaldehyde Emission from Plywood Adhesive Filling a Ground Scallop Shell

Yamanaka, Shinya; Magara, Kohei; Hirabayashi, Yasushi; Fujimoto, Toshiyuki; Kuga, Yoshikazu

doi:10.4164/sptj.51.400

Cited by 3 publications

(2 citation statements)

References 6 publications

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“… d It is noted that the curing reaction was carried out using an oven in this study. According to our previous study, 58 this simple evaluation method for measuring a formaldehyde emission from UF resin was in good agreement with the emission from plywood. e The unit is mg/100 g. …”

Section: Resultssupporting

confidence: 68%

Reduction of formaldehyde emission from urea-formaldehyde resin with a small quantity of graphene oxide

2021

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Section: Resultssupporting

confidence: 68%

Reduction of formaldehyde emission from urea-formaldehyde resin with a small quantity of graphene oxide

2021

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“…It has been reported that calcium carbonate can adsorb harmful substances such as aldehydes and VOC. 5), 6) In addition, calcium carbonate is harmless to the human body and abundant on the earth, making it an attractive protective material for the 60 nuclear reactors in Japan.…”

Section: Introductionmentioning

confidence: 99%

Influence of amorphous calcium carbonate on strontium ion removability from aqueous solution

Shuseki

Mihara

Yasumori

et al. 2020

J. Ceram. Soc. Japan

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The Fukushima nuclear power plant accident caused an outflow of pollutants. Thus, precautionary measures must be taken by using preventive materials for the deterrence of such accidents. Herein, we aimed to develop inexpensive materials that can remove radioactive elements from an aqueous solution. We found that powders obtained from milling scallop shells, which were discarded in large quantities, removed Sr 2+ from aqueous solutions. The Sr 2+ removability of the scallop shell powder improved with milling time, indicating the influence of increase in the specific surface area on Sr 2+ removability. Despite of the same specific surface area, the scallop shell powder exhibited higher Sr 2+ removability than that of the unmilled CaCO 3. Differential scanning calorimetry evaluation for the investigation of factors other than the specific surface area revealed that the milled scallop shell powder contained amorphous calcium carbonate. Moreover, we synthesized amorphous calcium carbonate and found that it exhibited 60-times higher Sr 2+ removability than that of crystalline calcium carbonate. We concluded that the amorphous structure of calcium carbonate significantly affects the Sr 2+ removability from aqueous solutions. It was hypothesized that amorphous calcium carbonate removes Sr 2+ by incorporating Sr 2+ into the structure during crystallization in an aqueous solution.

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Grinding and Heavy Metal Adsorption of Discarded Shells from Sanriku

et al. 2018

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This study is aimed to develop a beneficial use of disposed seashells. Sanriku region in Iwate prefecture has an issue of disposals of seashells. In this study, we mechanochemically ground seashells under dry or wet conditions. We used a planetary ball mill, a tumbling ball mill, and a converge mill as mechanochemical grinding machine. After the grinding, we examined the heavy metal absorbencies of the ground materials, and of the compounds with seashellorigin hydroxyapatite (HAP). As a result, followings were found out: 1) When seashell-origin hydroxyapatite was used, it showed adequate heavy metal absorbency (Cd, Pb). 2) When mechanochemically ground scallop seashells without HAP were used, it showed adequate heavy metal absorbency (Cd, Pb). 3) When the scallop seashells are ground for long time under dry condition (mechanochemical grinding), the material tends to be amorphous, and its heavy metal absorbency becomes greater.

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Reduction of Formaldehyde Emission from Plywood Adhesive Filling a Ground Scallop Shell

Cited by 3 publications

References 6 publications

Reduction of formaldehyde emission from urea-formaldehyde resin with a small quantity of graphene oxide

Reduction of formaldehyde emission from urea-formaldehyde resin with a small quantity of graphene oxide

Influence of amorphous calcium carbonate on strontium ion removability from aqueous solution

Grinding and Heavy Metal Adsorption of Discarded Shells from Sanriku

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