Effective capture of uranium from highly fluoridated wastewater by Dictyophora indusiata-derived biochar and its derivative materials

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-05-29 DOI:10.1016/j.seppur.2025.133820

Hairui Hou , Shuqin Wang , Lin Fang , Xiangxue Wang , Baowei Hu

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Abstract

Extraction of uranium (U(Ⅵ)) from fluoride-rich radioactive wastewater is essential for nuclear energy development and environmental remediation. The current investigation delves into the viability of employing Dictyophora indusiata biochar (DIBC) materials modified with different chemical reagents (H₃PO₄, polyaniline, NaOH and KMnO₄) for the effective capture of U(Ⅵ) from highly fluoridated wastewater. By comparing the effects of different modification methods, the KMnO₄-modified DIBC (KM-DIBC) showed the most significant removal effect, which was attributed to its huge specific surface area, strong heterogeneity and a profusion of O-containing functional groups. The maximum removal capacity of U(Ⅵ) by KM-DIBC reached 182.90 mg·g⁻¹, marking a remarkable enhancement of 2.15 times compared to the original DIBC, and the uptake capacity remained as high as 132.44 mg·g⁻¹ even in an environment with high concentration of fluoride ions (c (F⁻) = 10 g·L⁻¹). Furthermore, KM-DIBC exhibited excellent stability in complex environments where multiple ions coexist, further confirming its great potential for practical applications. Detailed studies and analyses have indicated that the mechanism by which KM-DIBC removes U(Ⅵ) likely encompasses a sophisticated interplay of cation-π interactions, electrostatic attraction, coordination and Lewis acid-base interactions. This investigation not only provides new materials and methods for the effective removal of U(Ⅵ) from high-fluoride wastewater, but also provides important theoretical basis and technical support in the field of environmental remediation and nuclear resource recovery.

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利用工业双孢霉衍生的生物炭及其衍生材料有效捕获高氟废水中的铀

从富氟放射性废水中提取铀（U（Ⅵ））对于核能开发和环境补救至关重要。本研究探讨了用不同化学试剂（H3PO4、聚苯胺、NaOH和KMnO4）改性工业双孢菌生物炭（DIBC）材料有效捕获高氟废水中U（Ⅵ）的可行性。通过比较不同改性方法的效果，kmno4改性的DIBC （KM-DIBC）表现出最显著的去除效果，这是由于其比表面积大、非均质性强以及含有丰富的含o官能团。KM-DIBC对U（Ⅵ）的最大去除率达到182.90 mg·g−1，比原DIBC提高了2.15倍，即使在高浓度氟离子（c (F−)= 10 g·L−1）的环境下，其吸收率仍高达132.44 mg·g−1。此外，KM-DIBC在多离子共存的复杂环境中表现出优异的稳定性，进一步证实了其巨大的实际应用潜力。详细的研究和分析表明，KM-DIBC去除U（Ⅵ）的机制可能包括阳离子-π相互作用、静电吸引、配位和刘易斯酸碱相互作用的复杂相互作用。本研究不仅为高氟废水中U（Ⅵ）的有效去除提供了新材料和新方法，也为环境修复和核资源回收领域提供了重要的理论依据和技术支持。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.