用于高浓度有机染料废水处理的新型横流 Ag/wood 复合过滤器

IF 3.1 2区 农林科学 Q1 FORESTRY
Gensheng Wu, Tong Su, Pingan Li, Yunfeng Gu, Weiyu Chen, Bo Yu
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引用次数: 0

摘要

工业生产中产生的染料废水很难自然降解。天然木材具有分层和三维(3D)互连的微观结构,是一种理想的水处理材料。然而,有限的水传输途径会降低去除高浓度有机染料的效率。为了解决这个问题,我们结合结构设计和银氨溶液的水热处理,提出了一种低成本、可扩展的高效横流 Ag/wood 复合过滤器。银离子(Ag+)被木材木质素有效还原成银纳米粒子(Ag NPs),然后被木材纤维素和半纤维素中的羟基锚定。重要的是,银纳米粒子的加入不会破坏木材的三维多孔结构。过滤器两侧的对角线凹槽和外露通道可以引导污染物,确保污染物沿着细长的反应路径并通过微结构容器的扰动与银氧化物发生广泛的相互作用。8 毫米厚的横流式银/木复合过滤器具有直径 15 毫米、深度 4 毫米的凹槽,在水流量高达 1775 升/(m2∙h)的条件下,亚甲基蓝(MB)的降解效率达到了 99%。水通量和脱色效率的性能很大程度上取决于沟槽直径、沟槽深度和过滤器厚度。这种横流 Ag/wood 复合过滤器在一步法快速、有效去除各种有机污染物方面取得了重大进展,在水处理领域具有广泛的应用潜力。这项工作旨在提高清晰度和可读性,同时保留研究的技术细节和影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A novel cross-flow Ag/wood composite filter for high-concentration organic dye wastewater treatment

Dye wastewater produced from industry production is difficult to degrade naturally. Natural wood possesses a hierarchical and three-dimensional (3D) interconnected microstructure, making it a desirable material for water treatment. However, limited water transport pathways can reduce the efficiency of removing high-concentration organic dyes. To address this, we present a low-cost, scalable, and efficient cross-flow Ag/wood composite filter by combing the structural design and hydrothermal treatment using a silver-ammonia solution. Silver ions (Ag+) are effectively reduced to silver nanoparticles (Ag NPs) by wood lignin and then anchored by hydroxyl groups in the cellulose and hemicellulose of the wood. Importantly, the incorporation of Ag NPs does not compromise the 3D porous structure of the wood. Diagonal grooves and exposed channels on both sides of the filter guide pollutants, ensuring extensive interaction with Ag NPs along elongated reaction pathways and through microstructural vessel disturbances. An 8 mm-thick cross-flow Ag/wood composite filter, featuring grooves with a diameter of 15 mm and a depth of 4 mm, achieves a remarkable 99% degradation efficiency of methylene blue (MB) at a water flux of up to 1775 L/(m2∙h). The performance in water flux and decolorization efficiency hinges significantly on groove diameter, groove depth, and filter thickness. This cross-flow Ag/wood composite filter represents a promising advancement for rapid and effective removal of various organic pollutants in a single-step process, showcasing extensive potential for applications in water treatment. This work aims to enhance clarity and readability while maintaining the technical details and impact of the research.

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来源期刊
Wood Science and Technology
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
75
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.
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