Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 373, Issue -, Pages 705-715Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2019.04.005
Keywords
Doped graphene aerogel; Radioiodine; Adsorption and storage; Theoretical simulation
Categories
Funding
- 1000 Talent Plan program [31370086963030]
- Shandong Province [2017CXGC1010]
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High efficient adsorption of radioiodine in nuclear waste has attracted extensive attentions all over the world. In this work, we fabricated sulfur and nitrogen co-doped graphene aerogels (SN-GA) through one-step hydrothermal method, and investigated its iodine adsorption behavior including adsorption kinetics and isotherms in water. Our results reveal that SN-GA exhibits a 3D porous architecture with thiophene-S, oxidized-S, pyridine-N, pyrrole-N and graphite-N co-doped into the sp(2) carbon frameworks. The adsorption experiment showed SN-GA has a maximum iodine adsorption capacity of 999 mg g(-1) determined by Langmuir isotherm, and the adsorption process could be better described by the pseudo-second-order model.
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