Adsorption performance of U(Ⅵ) in wastewater by pomelo peel-based biochar loaded Mg/Al-LDH
WANG Ling-zhi1, XIE Shui-bo1,2, WEI Bai1, WANG Chen-xu1, GUO Yu1, LIU Ying-jiu1,2, LI Xu-zhong3
1. School of Civil Engineering, University of South China, Hengyang 421001, China; 2. Hunan Provincial Universities' Key Laboratory of Pollution Control and Resource Technology, University of South China, Hengyang 421001, China; 3. CINF Engineering Corporation Limited, Changsha 410019, China
Abstract: Pomelo peel-based biochar loaded MgAl layered double hydroxides composite (BC@Mg/Al-LDH) is synthesized via liquid phase co-precipitation method,and applied to remove U(Ⅵ) from wastewater.The effects of pH,temperature,reaction time,initial concentration and interfering ions on the adsorption of U(Ⅵ) by BC@Mg/Al-LDH are investigated.The consequence indicates that the adsorption amount of BC@Mg/Al-LDH for U(Ⅵ) has reached 96 mg·g-1 in 5 minutes when the initial mass concentration of U(Ⅵ) is 10 mg·L-1,pH=5,the temperature is 303 K,and the dosage of BC@Mg/Al-LDH is 0.1 g·L-1.The adsorption process can be well described by pseudo-second-order and Freundlich models.It is shown through FT-IR and XPS analysis that main adsorption mechanisms include surface hydroxyl complexation and interlayer carbonate coprecipitation.Ca2+,Fe3+,Mg2+,Cu2+ and other interfering ions have no significant effect on the adsorption.The adsorption rate can still be closed to 80% after BC@Mg/Al-LDH has experienced for 5 cycles of regeneration.
王灵智, 谢水波, 魏柏, 王晨旭, 郭宇, 刘迎九, 李绪忠. 柚子皮生物炭负载Mg/Al-LDH对废水中U(Ⅵ)的吸附性能研究[J]. 现代化工, 2023, 43(1): 163-168.
WANG Ling-zhi, XIE Shui-bo, WEI Bai, WANG Chen-xu, GUO Yu, LIU Ying-jiu, LI Xu-zhong. Adsorption performance of U(Ⅵ) in wastewater by pomelo peel-based biochar loaded Mg/Al-LDH. Modern Chemical Industry, 2023, 43(1): 163-168.
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