Elution suppression effect of radioactive cesium from municipal solid waste incineration fly ash using 10-[(tert-butyldiphenylsilyl)oxy]-decanoic acid

IF 2.7 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Material Cycles and Waste Management Pub Date : 2025-02-23 DOI:10.1007/s10163-025-02170-2

Taiga Kaseda, Narihito Ogawa, Yuya Koike

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引用次数: 0

Abstract

We studied the suppression of radioactive Cs elution from municipal solid waste incineration (MSWI) fly ash using 10-[(tert-butyldiphenylsilyl)oxy]-decanoic acid. The synthesized decanoic acid derivative coated on MSWI fly ash containing less than 8000 Bq kg⁻¹ of radioactive Cs, and the amount of radioactive Cs eluted into pure water was measured by the Japanese Leaching Test No. 13. The elution rate of ¹³⁷Cs from raw fly ash was normalized to 100%, and the relative elution rate of ¹³⁷Cs using 10-[(tert-butyldiphenylsilyl)oxy]-decanoic acid was 25.3%. The synthesized carboxylic acid showed a high elution suppression effect on ¹³⁷Cs in MSWI fly ash. SEM revealed that the water repellent layer was maintained on the MSWI fly ash treated with carboxylic acid synthesized around JLT-13. In addition, the contact angle measurement showed that the surface of the MSWI fly ash treated with the synthesized carboxylic acid for water repellency was hydrophobic. These results indicate that the surface of the MSWI fly ash was changed by applying a water repellent treatment with the synthesized carboxylic acid.

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10-[（叔丁基二苯硅基）氧]-癸酸对城市生活垃圾焚烧飞灰中放射性铯的洗脱抑制作用

研究了10-[（叔丁基二苯硅基）氧]-癸酸对城市生活垃圾焚烧飞灰中放射性铯的抑制作用。将合成的十烷酸衍生物包覆在含放射性Cs小于8000 Bq kg−1的生活垃圾飞灰上，采用日本浸出试验13号法测定放射性Cs洗脱到纯水中的量。对原粉煤灰中137Cs的洗脱率进行归一化，洗脱率为100%，10-[（叔丁基二苯硅基）氧]-癸酸对137Cs的相对洗脱率为25.3%。合成的羧酸对生活垃圾飞灰中的137Cs具有较高的洗脱抑制作用。扫描电镜结果表明，JLT-13周围合成的羧酸处理后的MSWI粉煤灰仍保持着拒水层。此外，接触角测试表明，合成的羧酸防水剂处理后的生活垃圾粉煤灰表面具有疏水性。结果表明，合成的羧酸对生活垃圾粉煤灰进行拒水处理后，其表面发生了变化。

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来源期刊

Journal of Material Cycles and Waste Management 环境科学-环境科学

CiteScore

5.30

自引率

16.10%

发文量

205

审稿时长

4.8 months

期刊介绍： The Journal of Material Cycles and Waste Management has a twofold focus: research in technical, political, and environmental problems of material cycles and waste management; and information that contributes to the development of an interdisciplinary science of material cycles and waste management. Its aim is to develop solutions and prescriptions for material cycles. The journal publishes original articles, reviews, and invited papers from a wide range of disciplines related to material cycles and waste management. The journal is published in cooperation with the Japan Society of Material Cycles and Waste Management (JSMCWM) and the Korea Society of Waste Management (KSWM).