Effective xylan integration for remodeling biochar uniformity and porosity to enhance chemical elimination and CO2 adsorption

IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Yongtai Wang , Huiyi Zhang , Yunong Li , Hua Yu , Dan Sun , Yujing Yang , Ran Zhang , Li Yu , Fei Ma , Muhammad Nauman Aftab , Liangcai Peng , Yanting Wang
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Abstract

Although plant evolution has offered diverse biomass resources, the production of high-quality biochar from desirable lignocelluloses remains unexplored. In this study, distinct lignocellulose substrates derived from eight representative plant species were employed to prepare biochar samples under three different temperature treatments. Correlation analysis showed that only hemicellulose was a consistently positive factor of lignocellulose substrates to account for the dye-adsorption capacities of diverse biochar samples. Furthermore, we integrated exo-xylan, a major hemicellulose in higher plants, into lignin-disassociated lignocelluloses to produce the desirable biochar with a uniform and symmetrical structure, resulting in a 5.2-fold increase in surface area (51 to 317 m2/g) and a 5.0-fold increase in total pore volume (0.02 to 0.11 cm3/g micropore, 0.02 to 0.12 cm3/g mesopore). This consequently improved the adsorption capacities of the remodeled biochar, with an increase of 26 % for dual-industry dyes, 90 % for 1579 organic compounds, and 14 % for CO2. Based on the fluorescence observation of xylan-cellulose co-localization and physical-chemical characterization of the remodeled biochar, a novel hypothetical model was proposed to explain how xylan plays an integral role in desired biochar production, providing insights into effective lignocellulose reconstruction and efficient thermochemical catalysis as an integrative strategy to maximize biochar adsorption capacity.

Abstract Image

有效的木聚糖整合重塑生物炭的均匀性和孔隙度,以增强化学消除和二氧化碳吸附。
尽管植物进化提供了多种生物质资源,但从理想的木质纤维素中生产高质量的生物炭仍未被探索。在本研究中,利用来自8种代表性植物的不同木质纤维素基质,在3种不同温度处理下制备生物炭样品。相关分析表明,只有半纤维素是木质纤维素底物对不同生物炭样品染料吸附能力的一致的积极因素。此外,我们将高等植物中的主要半纤维素外木聚糖整合到木质素解离的木质纤维素中,生产出具有均匀对称结构的理想生物炭,从而使表面积增加5.2倍(51至317 m2/g),总孔容增加5.0倍(0.02至0.11 cm3/g微孔,0.02至0.12 cm3/g中孔)。因此,改造后的生物炭对双工业染料的吸附能力提高了26% %,对1579有机化合物的吸附能力提高了90% %,对CO2的吸附能力提高了14% %。基于木聚糖-纤维素共定位的荧光观察和改造后生物炭的物理化学特征,提出了一个新的假设模型来解释木聚糖如何在期望的生物炭生产中发挥不可或缺的作用,为有效的木质纤维素重建和高效的热化学催化作为最大化生物炭吸附能力的综合策略提供了见解。
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来源期刊
International Journal of Biological Macromolecules
International Journal of Biological Macromolecules 生物-生化与分子生物学
CiteScore
13.70
自引率
9.80%
发文量
2728
审稿时长
64 days
期刊介绍: The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.
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