One-pot synthesis of silica-gel-based adsorbent with Schiff base group for the recovery of palladium ions from simulated high-level liquid waste

Wu Hao; Kim Seong-Yun; Ito Tatsuya; Miwa Misako; Matsuyama Shigeo

doi:10.1016/j.net.2022.04.024

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자료유형: 학술저널

저자정보: Wu Hao (Tohoku University) Kim Seong-Yun (Tohoku University) Ito Tatsuya (Japan Atomic Energy Agency, Tokai, Ibaraki, Japan) Miwa Misako (Tohoku University) Matsuyama Shigeo (Tohoku University)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제10호

발행연도: 2022.10

수록면: 3,641 - 3,649 (9page)

DOI: 10.1016/j.net.2022.04.024

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A simple solvothermal reaction was used to prepare a 3-aminopropyl-functionalized silica-gel-based adsorbent for adsorbing Pd(II) from the nitric acid solution. Scanning electron microscopy, fourier transform infrared spectroscopy, and thermogravimetry analysis were performed on the as-synthesized adsorbent to demonstrate the successful introduction of Schiff base groups. Batch experiments were used to investigate the effects of contact time, nitric acid concentration, solution temperature, and adsorption capacity. It is worth noting that the prepared adsorbent exhibited a higher affinity toward Pd(II) with the uptake approximately 100% even in a 2 M HNO3 solution. At an equilibrium time of 5 h, the maximum adsorption capacity of Pd(II) was estimated to be 0.452 mmol/g. The adsorbed Pd(II) could be completely eluted by dissolving 0.2 M thiourea solution in 0.1 M HNO3. Using a combination of particle-induced Xray emission analysis and an X-ray photoelectron spectrometer, the adsorbed Pd was found to be uniformly distributed on the surface of the prepared adsorbent and the existing species were Pd(II) and zero-valent Pd(0). Due to the desirable performances, facile preparation method, and abundant raw material source, the prepared adsorbent demonstrated a high application potential in the recovery of Pd(II) from simulated high-level liquid waste treatment

#Schiff base #Silica-gel #Palladium ion #Particle-induced X-ray emission analysis #Simulated high-level liquid waste

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