Effects of iron corrosion products on the degradation of bentonite structure and properties

doi:10.1038/s41529-023-00380-3

IMR OpenIR

	Effects of iron corrosion products on the degradation of bentonite structure and properties
	Sun, Yupeng 1,2; Zhou, Yangtao 2; Wei, Xin 2; Dong, Junhua 2; Chen, Nan 2; Ren, Qiying 2; Wang, Junhu 3; Ke, Wei 4
通讯作者	Wei, Xin(xwei@imr.ac.cn) ; Dong, Junhua(jhdong@imr.ac.cn)
	2023-08-11
发表期刊	NPJ MATERIALS DEGRADATION
卷号	7 期号:1 页码:11
摘要	Bentonite is a key material for engineering barriers to prevent groundwater and nuclide migration in the multi-barrier system of high-level radioactive waste (HLW) geological disposal. However, its barrier property will be degraded under the action of iron corrosion products of steel disposal containers. In this paper, the effects of iron corrosion products on the degradation of bentonite structure and properties were investigated in the simulated environments for HLW geological disposal. The results showed that Fe2+/Fe3+ dissolved from iron powder could enter montmorillonite (Mt) interlayer and substituted part of Na+, which caused the decrease of the volume and interlayer spacing of Mt, and the structural integrity of Mt was destroyed. Macroscopically, the water absorption and swelling property of bentonite were significantly decreased. The degradation mechanism of Mt structure was mainly that Fe2+/Fe3+ generated by iron corrosion entered the interlayer domain of Mt to compensate for the interlayer charge deficit.
资助者	National Natural Science Foundation of China ; major Ramp;D project of Liaoning Province
DOI	10.1038/s41529-023-00380-3
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52173304] ; National Natural Science Foundation of China[U1867216] ; National Natural Science Foundation of China[51701222] ; major Ramp;D project of Liaoning Province[2020JH1/10100001]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001048261500001
出版者	NATURE PORTFOLIO
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178919
专题	中国科学院金属研究所
通讯作者	Wei, Xin; Dong, Junhua
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Adv Mossbauer Spect, Mossbauer Effect Data Ctr, 457 Zhongshan Rd, Dalian 116023, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Environm Corros Ctr Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Sun, Yupeng,Zhou, Yangtao,Wei, Xin,et al. Effects of iron corrosion products on the degradation of bentonite structure and properties[J]. NPJ MATERIALS DEGRADATION,2023,7(1):11.
APA	Sun, Yupeng.,Zhou, Yangtao.,Wei, Xin.,Dong, Junhua.,Chen, Nan.,...&Ke, Wei.(2023).Effects of iron corrosion products on the degradation of bentonite structure and properties.NPJ MATERIALS DEGRADATION,7(1),11.
MLA	Sun, Yupeng,et al."Effects of iron corrosion products on the degradation of bentonite structure and properties".NPJ MATERIALS DEGRADATION 7.1(2023):11.