論文

査読有り
2021年6月

Gamma-irradiation-induced molecular-weight distribution and complexation affinity of humic acid with Cs+, Sr2+, and Eu3+

Journal of Hazardous Materials
  • Qi Zhao
  • ,
  • Taishi Kobayashi
  • ,
  • Takeshi Saito
  • ,
  • Takayuki Sasaki

411
開始ページ
125071
終了ページ
125071
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jhazmat.2021.125071
出版者・発行元
Elsevier BV

Solutions of humic acid (HA) were irradiated with 0, 1, 5, 10, 50, and 100 kGy of gamma irradiation using a 60Co source. The non-irradiated and irradiated HA molecules were fractionated by ultrafiltration into four categories: > 100, 50?100, 10?50, and < 10 kDa. Total organic carbon measurements and potentiometric titration analysis suggested that (1) some gamma-irradiated HA molecules were degraded into smaller molecules and (2) radiolytic degradation caused phenolic ?OH became the predominant functional group in the small molecular-weight fractions of HA. The effect of absorbed dose of gamma rays on the distributions of Cs+, Sr2+, and Eu3+ ions in the molecular-weight fractions of the metal?HA systems was examined to discuss the complexation affinity. The metal ions were distributed in the smaller molecular-weight fractions at different doses, which corresponded to the degradation of HA molecules. For a predetermined absorbed dose, Cs+ ions did not change the molecularweight distribution of the total organic carbon content of the degraded HA molecules. Conversely, the Sr2+ and Eu3+ ions redistributed organic carbon toward the larger molecular-weight fractions.

リンク情報
DOI
https://doi.org/10.1016/j.jhazmat.2021.125071
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000638070400003&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.jhazmat.2021.125071
  • ISSN : 0304-3894
  • eISSN : 1873-3336
  • Web of Science ID : WOS:000638070400003

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