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Published on: May 11, 2017
Ni-Al layered double hydroxides modified sponge skeleton with polydopamine coating for enhanced U(VI) extraction from
Xiaoyu Yuan1, XiaoYan Jing2, Hui Xu3
1College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China; College of Materials and Chemical Engineering, Heilongjiang Institute of Technology, Harbin, 150001, China; Key Laboratory of Marine Special Materials, Ministry of Industry and Information Technology, Harbin Engineering University, Harbin, 150001, China.
A novel 3D macroscopic adsorbent, MP@LDH, was developed for efficient uranium (VI) recovery from aqueous solutions. This easy-to-recover material shows high capacity and selectivity, offering a practical method for extracting uranium from seawater.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nuclear Engineering
Background:
- Uranium (VI) is crucial for nuclear power, with vast quantities in seawater.
- Current powdered adsorbents pose challenges for practical uranium recovery from aqueous solutions.
Purpose of the Study:
- To develop an easy-to-recover, 3D macroscopic adsorbent for Uranium (VI) extraction.
- To evaluate the adsorption capacity, selectivity, and performance in simulated seawater.
Main Methods:
- Preparation of MP@LDH by anchoring LDH onto polydopamine-coated melamine sponge.
- Adsorption experiments to determine capacity, selectivity against competing ions, and removal rate in simulated seawater.
Main Results:
- MP@LDH achieved a maximum adsorption capacity of 559.8 mg g⁻¹ for U(VI).
- Demonstrated excellent selectivity for U(VI) over other metal ions (e.g., Ba(II), Sr(II), Zn(II)).
- Achieved an 88.18% removal rate for U(VI) from simulated seawater.
Conclusions:
- MP@LDH is a promising adsorbent for U(VI) extraction due to its easy retrieval, high capacity, and selectivity.
- This macroscopic adsorbent offers a convenient approach for practical U(VI) recovery from large water bodies like seawater.
