Multifunctional MnO2 nanorods-modified wood sponge for water remediation: applications for heavy metal sorption and oil/water separation

IF 3.1 2区农林科学 Q1 FORESTRY

Wood Science and Technology Pub Date : 2024-10-03 DOI:10.1007/s00226-024-01602-w

Siavosh Vojdani Saghir, Elaheh K. Goharshadi

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引用次数: 0

Abstract

This study presents the development of a wood sponge (WS) modified with MnO₂ nanorods (MnO₂/WS) derived from balsa natural wood, an abundant and environmentally friendly raw material, for the adsorption of organic solvents, oils, and heavy metal ions from water. The MnO₂/WS composite exhibits an exceptionally low density of 0.014 g cm^− 3 and a high porosity of approximately 97%. It demonstrates consistent sorption-desorption performance over 20 cycles. Zeta potential analysis reveals that MnO₂ nanorods carry a negative charge (-22.31 mV) at pH 4.68, indicating their affinity for adsorbing positively charged heavy metal ions, which are commonly found in industrial effluents. Moreover, WS shows remarkable mechanical robustness, enduring 1000 stress-strain cycles with high shape recovery, ensuring its durability under operational conditions. The data highlight several strengths of MnO₂/WS, including cost-effective production process, high reusability, remarkable sorption capacities for carbon tetrachloride and soybean oil (29.56 and 17.65 times its mass, respectively), and efficient performance. Its capability to produce potable water from real industrial effluents positions MnO₂/WS as an ideal solution for addressing water crises.

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用于水修复的多功能 MnO2 纳米棒改性木质海绵：在重金属吸附和油/水分离方面的应用

本研究介绍了一种用二氧化锰纳米棒（MnO2/WS）改性的木质海绵（WS）的开发情况，这种木质海绵取自巴尔萨天然木材（一种丰富的环保型原材料），用于吸附水中的有机溶剂、油类和重金属离子。MnO2/WS 复合材料的密度极低，仅为 0.014 g cm-3，孔隙率高达约 97%。在 20 个循环中，它的吸附-解吸性能始终如一。Zeta 电位分析表明，MnO2 纳米棒在 pH 值为 4.68 时带负电荷（-22.31 mV），这表明它们对吸附工业废水中常见的带正电荷的重金属离子具有亲和力。此外，WS 还表现出卓越的机械坚固性，可承受 1000 次应力应变循环，形状恢复能力强，确保了其在操作条件下的耐用性。数据凸显了二氧化锰/WS 的几大优势，包括生产工艺成本低、可重复使用性高、对四氯化碳和豆油的吸附能力强（分别为其质量的 29.56 倍和 17.65 倍）以及性能高效。二氧化锰/WS 能够利用真正的工业废水生产饮用水，是解决水危机的理想解决方案。

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来源期刊

Wood Science and Technology 工程技术-材料科学：纸与木材

CiteScore

5.90

自引率

5.90%

发文量

审稿时长

3 months

期刊介绍： Wood Science and Technology publishes original scientific research results and review papers covering the entire field of wood material science, wood components and wood based products. Subjects are wood biology and wood quality, wood physics and physical technologies, wood chemistry and chemical technologies. Latest advances in areas such as cell wall and wood formation; structural and chemical composition of wood and wood composites and their property relations; physical, mechanical and chemical characterization and relevant methodological developments, and microbiological degradation of wood and wood based products are reported. Topics related to wood technology include machining, gluing, and finishing, composite technology, wood modification, wood mechanics, creep and rheology, and the conversion of wood into pulp and biorefinery products.