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Bismuthene@ZnAlBi LDHs structure as a novel nanosorbent for efficient uptake of arsenic (V)
Applied Water Science ( IF 5.5 ) Pub Date : 2024-03-14 , DOI: 10.1007/s13201-024-02107-4
Saad S. M. Hassan , Mohamed E. Mahmoud , Rana M. Tharwat , Amir M. Abdelfattah

Two-dimensional bismuthene material is characterized with promising and superior optical, electrical and other characteristics. The application of 2D-bismuthene or its composites in water remediation of As(V) was not previously investigated. Consequently, embedded bismuthene into zinc aluminum bismuth-layered double hydroxide (ZnAlBi LDHs-embedded-Biene) was simply fabricated as a novel nanosorbent. Bismuthene (Biene) was prepared by bottom up hydrothermal reaction, while ZnAlBi LDHs was synthesized by a coprecipitation method followed by hydrothermal treatment process. Characterization of ZnAlBi LDHs-embedded-Biene referred to a crystalline mesoporous structure of globular particles with 5–8 nm. It was confirmed that the nanosorbent exterior surface is functionalized with metal oxides and metal oxyhydroxide, while exchangeable carbonate anion existed in the nanosorbent inner layer. Therefore, arsenate uptake was favored by both exterior electrostatic attraction and anion exchange processes. The highest uptake capacity of As(V) by ZnAlBi LDHs-embedded-Biene was detected at pH 3 and contact time 30 min providing 94.67% removal by using 5 mg L−1 As(V) concentration. The ionic strength factor proved a good selectivity of the nanosorbent toward As(V) ions. Thermodynamic behavior of interaction between As(V) and nanosorbent was emphasized as exothermic and spontaneous process, while the kinetic evaluation indicated that the pseudo-second order was the best-fitting expression. The application of ZnAlBi LDHs-embedded-Biene in the adsorptive uptake process of As(V) ions from various water samples referred to elevated uptake percentages as 93.29% and 90.52% by 5 mg L−1 and 10 mg L−1 As(V), respectively. The adsorbed As(V) onto ZnAlBi LDHs-embedded-Biene exhibited excellent recyclability and re-usage up to five cycles to affirm that the designed ZnAlBi LDHs-embedded-Biene has a great prospect for utilization in water purification from As(V).



中文翻译:

Bismuthene@ZnAlBi LDHs结构作为一种新型纳米吸附剂,可有效吸收砷(V)

二维铋材料具有广阔的前景和优越的光学、电学等特性。二维铋烯或其复合材料在水体 As(V) 修复中的应用此前尚未进行过研究。因此,将铋嵌入锌铝铋层状双氢氧化物(ZnAlBi LDHs-embedded-Biene)中,简单地制成了一种新型纳米吸附剂。 Bismuthene (Biene) 通过自下而上的水热反应制备,而 ZnAlBi LDHs 通过共沉淀法和水热处理过程合成。 ZnAlBi LDHs-embedded-Biene 的表征是指 5-8 nm 球状颗粒的结晶介孔结构。已证实纳米吸附剂外表面被金属氧化物和金属羟基氧化物功能化,而纳米吸附剂内层存在可交换的碳酸根阴离子。因此,外部静电吸引和阴离子交换过程都有利于砷酸盐的吸收。在 pH 3 和接触时间 30 分钟下检测到 ZnAlBi LDHs-embedded-Biene 对 As(V) 的最高吸收能力,使用 5 mg L -1 As(V) 浓度可实现 94.67% 的去除率。离子强度因子证明纳米吸附剂对As(V)离子具有良好的选择性。 As(V)与纳米吸附剂相互作用的热力学行为被强调为放热和自发过程,而动力学评估表明二级是最拟合的表达式。 ZnAlBi LDHs-embedded-Biene在各种水样中As(V)离子的吸附吸收过程中的应用表明,5 mg L -1和10 mg L -1 As(V) 的吸收百分比分别提高到93.29%和90.52% ), 分别。 ZnAlBi LDHs-embedded-Biene 上吸附的 As(V) 表现出优异的可回收性和最多五个循环的重复使用性,这证实了设计的 ZnAlBi LDHs-embedded-Biene 在 As(V) 水净化中的应用具有广阔的前景。

更新日期:2024-03-14
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