Eco-efficient fractionation of bamboo using a pyruvic acid-based deep eutectic solvent: a waste-minimized strategy for comprehensive valorization

IF 10.6 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2026-06-22 Epub Date: 2026-06-05 DOI:10.1039/d6gc00388e

Fan Zhang , Jianbo Huang , Zeqi Wu , Zhenhua Su , Jun Xie , Chuanfu Liu , Wu Lan

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Abstract

Achieving comprehensive biomass valorization with minimal environmental impact is a critical challenge in advancing sustainable biorefineries. This study establishes a waste-minimized strategy for bamboo fractionation using a novel deep eutectic solvent (choline chloride/pyruvic acid), designed to enhance pyrolytic saccharification efficiency, lignin valorization, and direct spent-filtrate upcycling. Under mild conditions (100 °C, 1 h), this eco-efficient pretreatment facilitated selective delignification (98%) while retaining 92% of cellulose. The fractionated residue was converted to levoglucosan (36% yield) via fast pyrolysis, and the extracted reactive lignin was successfully applied in UV-protective sunscreens and aromatic chemical production. Notably, the xylose-enriched spent DES filtrate was directly incorporated into polyvinyl alcohol (PVA) as a proof-of-concept additive to prepare composite films, thereby avoiding direct discharge or energy-intensive purification of this organic-rich stream. While these films exhibited enhanced mechanical and UV-shielding properties, their water sensitivity makes the current formulation most suitable for dry applications. Overall, this work presents a waste-minimized bamboo biorefinery strategy that integrates biomass fractionation, component valorization, and spent-liquor upcycling within a cleaner-production framework.

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利用丙酮酸为基础的深度共熔溶剂对竹子进行生态高效的分馏：一种综合增值的废物最小化策略

以最小的环境影响实现全面的生物质增值是推进可持续生物炼制的关键挑战。本研究建立了一种使用新型深度共熔溶剂（氯化胆碱/丙酮酸）进行竹材分馏的废物最小化策略，旨在提高热解糖化效率、木质素增值和直接废滤液的升级回收。在温和的条件下（100°C, 1 h），这种生态高效的预处理促进了选择性脱木质素（98%），同时保留了92%的纤维素。分馏残渣经快速热解转化为左旋葡聚糖（产率36%），提取的活性木质素成功应用于防紫外线防晒霜和芳香化工生产。值得注意的是，将富含木糖的废DES滤液直接掺入聚乙烯醇（PVA）中，作为概念验证添加剂制备复合膜，从而避免了直接排放或对这种富含有机物的废水进行高能耗净化。虽然这些薄膜表现出增强的机械和紫外线屏蔽性能，但它们的水敏感性使目前的配方最适合干燥应用。总体而言，本研究提出了一种废物最小化的竹生物炼制策略，该策略将生物质分馏、组分增值和废液升级回收整合在清洁生产框架内。

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来源期刊

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.