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Xia X, Liao Z, Deng J, Yang G, Nie X, Ma C, Cheng W, Pan N, Zhang W, Dong F. Efficient purification of low-level uranium-containing wastewater by polyamine/amidoxime synergistically reinforced fiber. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123269. [PMID: 38159627 DOI: 10.1016/j.envpol.2023.123269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/12/2023] [Accepted: 12/28/2023] [Indexed: 01/03/2024]
Abstract
The removal and recovery of uranium [U(VI)] from organic containing wastewater has been a challenging in radioactive wastewater purification. Here, we designed a polyamine/amidoxime polyacrylonitrile fiber (PAN-AO-A) with high removal efficiency, excellent selectivity, excellent organic resistance and low cost by combining the anti-organic properties of amidoxime polyacrylonitrile fiber (PAN-AO-A) with the high adsorption capacity of polyamine polyacrylonitrile fiber, which is used to extract U(VI) from low-level uranium-containing wastewater with high ammonia nitrogen and organic content. PAN-AO-A adsorbent with high grafting rate (86.52%), high adsorption capacity (qe = 618.8 mg g-1), and strong resistance to organics and impurity interference is achieved. The adsorption rate of U(VI) in both real organic and laundry wastewater containing uranium is as high as 99.7%, and the partition coefficients (Kd) are 7.61 × 105 mL g-1 and 9.16 × 106 mL g-1, respectively. The saturated adsorption capacity of PAN-AO-A in the continuous system solution can reach up to 505.5 mg g-1, and the concentration of U(VI) in the effluent is as low as 1 μg L-1. XPS analysis and Density functional theory (DFT) studies the coordination form between U(VI) and PAN-AO-A, where the most stable structure is η2-AO(UO2)(CO3)2. The -NH-/-NH2 and -C(NH2)N-OH groups of PAN-AO-A exhibit a synergistic complex effect in the U(VI) adsorption process. PAN-AO-A is a material with profound influence and limitless potential that can be used for wastewater containing U(VI) and organic matter.
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Affiliation(s)
- Xue Xia
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Zhihui Liao
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Jianju Deng
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Guohui Yang
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Xiaoqin Nie
- School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Chunyan Ma
- School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Wencai Cheng
- School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Ning Pan
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, 621010, China; School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Wei Zhang
- Analytical and Testing Center, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Faqin Dong
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China; Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China.
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