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Jinxin YI (易锦馨), Zhipeng HUO (霍志鹏), Xiaoli TAN (谭小丽), Changlun CHEN (陈长伦), Abdullah M ASIRI, Khalid A ALAMRY, Jiaxing LI (李家星). Plasma-facilitated modification of pumpkin vine-based biochar and its application for efficient elimination of uranyl from aqueous solution[J]. Plasma Science and Technology, 2019, 21(9): 95502-095502. DOI: 10.1088/2058-6272/ab25d1
Citation: Jinxin YI (易锦馨), Zhipeng HUO (霍志鹏), Xiaoli TAN (谭小丽), Changlun CHEN (陈长伦), Abdullah M ASIRI, Khalid A ALAMRY, Jiaxing LI (李家星). Plasma-facilitated modification of pumpkin vine-based biochar and its application for efficient elimination of uranyl from aqueous solution[J]. Plasma Science and Technology, 2019, 21(9): 95502-095502. DOI: 10.1088/2058-6272/ab25d1

Plasma-facilitated modification of pumpkin vine-based biochar and its application for efficient elimination of uranyl from aqueous solution

  • An acrylic modified pumpkin vine-based biochar (p-PVB-PAA) is synthesized by non-thermal plasma-grafting modification of pumpkin vine-based biochar (PVB) for the removal of uranyl from an aqueous solution. Microscopic characterization reveals that compared to PVB the surface of p-PVBPAA has more oxygen-containing functional groups by strong chemical bonding and the specific surface area is increased to 275.3 m2 g−1 from 3.8 m2 g−1. It is found that p-PVB-PAA showed a much higher maximum adsorption capacity for uranyl from aqueous solutions than PVB, which were 207.02 mg g−1 and 67.58 mg g−1 at pH=5 and 298 K, respectively. Moreover, the adsorption behavior follows a pseudo-second-order kinetics model and the Langmuir adsorption model. Additionally, macroscopic experiments and spectroscopic studies verified that the significantly improved adsorption performance of the p-PVB-PAA is due to surface complexation and electrostatic interactions. Furthermore, the very high removal efficiency and excellent regeneration ability (the percentage of the removal still remained at nearly 90% after five cycles) makes this low-cost, easily obtained, and environmentally friendly material attractive for commercial application.
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