首页|Cold sintering of ammonium phosphomolybdate ((NH_4)_3PMo_(12)O_(40)·xH_2O) as soild-state matrices for cesium immobilization

Cold sintering of ammonium phosphomolybdate ((NH_4)_3PMo_(12)O_(40)·xH_2O) as soild-state matrices for cesium immobilization

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  • NETL
  • NSTL
  • Elsevier
Ammonium phosphomolybdate (APM) is often used for the adsorption of Cs~+. However, the decomposition temperature of cesium-containing ammonium phosphomolybdate waste is low and difficult to dispose of. This study introduces the first use of cold sintering to solidify ammonium phosphomolybdate monomers at low temperatures. The maximum adsorption capacity of the synthesized ammonium phosphomolybdate was 112.58 mg/g. Cold sintering results indicate that the HNO_3 was more effective than other acidic or salt solutions for densifying ammonium phosphomolybdate. The optimal conditions for cold sintering were 200 ℃, 500 MPa, 10 wt% HNO_3, and 10 min. The cold-sintered Cs-ammonium phosphomolybdate ceramic exhibited impressive compressive strength (624.7 MPa), Vickers microhardness (165.2 HV) and relative density of (97.61 %). The Cs leaching rate of Cs-ammonium phosphomolybdate ceramics was as low as 7.38 × 10~(-5) g m~(-2)·d~(-1) after measured at 90 ℃ for 7 days.

Cold sintering processCs-adsorbed APMSolidificationDensificationCs immobilization mechanism

Chi Zhang、Pengju Chen、Yi Zhou、Yue Ji、Shunyan Ning、Lifeng Chen、Yupeng Xie、Hao Wu、Yan Wu、Yuezhou Wei、Weiqun Shi、Xiangbiao Yin

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School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang 421001, PR China

School of Resource Environment and Safety Engineering, University of South China, 28 Changsheng West Road, Hengyang 421001, PR China

School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China

School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang 421001, PR China||School of Nuclear Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China

Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, Beijing 100049, PR China

School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang 421001, PR China||Key Laboratory of Advanced Nuclear Energy Design and Safety, Ministry of Education, University of South China, 28 Changsheng West Road, Hengyang, PR China

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2025

10.1016/j.jenvman.2025.125232

Journal of environmental management

Journal of environmental management

ISSN：0301-4797
年,卷(期)：2025.382(May)
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