Sodium lignosulfonate-assisted alkaline hydrothermal pretreatment improves the production of humic-like substances from lignocellulosic biomass waste residues

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2024-10-31 DOI:10.1016/j.indcrop.2024.119960

Jiajun Zhou , Haoran Li , Qinghan Zeng , Yuanyuan Zhu , Yong Xu , Junjun Zhu

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引用次数: 0

Abstract

In order to provide key precursors for humic-like substances formation via alkaline hydrothermal pretreatment (AHP), this study introduced an innovative approach by incorporating sodium lignosulfonate (SL) into the AHP to boost the production of humic-like acid (HLA) and fulvic-like acid (FLA) from biomass wastes. The SL-AHP conditions were optimized, and structural analysis of HLA was performed. The highest HLA yield reached 21.90 %, and FLA content reached 13.38 g/L after SL-AHP at 200 °C for 2 h with 15 g/L SL. The inclusion of SL led to a 19.67 % increase in HLA yield and a 5.25-fold enhancement in FLA content compared to that without SL. The probable reason underlying SL's facilitation of HLA and FLA formation involved the effective dissolution of lignin and hemicelluloses to produce more precursors, as well as the incorporation of SL structure into the HLA molecule. SL acted as both a surfactant and a precursor for the production of HLA and FLA. In addition, an increase in acidic groups improved the quality of HLA.

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木质素磺酸钠辅助碱性水热预处理可提高木质纤维素生物质废渣中腐殖质类物质的产量

为了通过碱性水热预处理（AHP）为类腐植酸物质的形成提供关键前体，本研究引入了一种创新方法，即在 AHP 中加入木质素磺酸钠（SL），以提高生物质废物中类腐植酸（HLA）和富里酸（FLA）的产量。对 SL-AHP 条件进行了优化，并对 HLA 进行了结构分析。在 200 °C 下进行 SL-AHP 2 小时并加入 15 g/L SL 后，HLA 的最高产量达到 21.90 %，FLA 含量达到 13.38 g/L。与不添加 SL 的情况相比，添加 SL 使 HLA 产量提高了 19.67%，FLA 含量提高了 5.25 倍。SL促进HLA和FLA形成的可能原因包括有效溶解木质素和半纤维素以产生更多的前体，以及将SL结构纳入HLA分子。SL 既是表面活性剂，也是 HLA 和 FLA 生成的前体。此外，酸性基团的增加也提高了 HLA 的质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.