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A sustainable approach to enhancing humic acid production from lignocellulose via green alum

文献类型： 外文期刊

作者： Su, Jinting 1 ; Liu, Ziyun 2 ; Zhao, Lixin 2 ; Huo, Lili 2 ; Yi, Weiming 1 ; Li, Zhihe 1 ; Wang, Lihong 1 ; Yao, Zonglu 2 ;

作者机构： 1.Shandong Univ Technol, Shandong Res Ctr Engn & Technol Clean Energy, Sch Agr Engn & Food Sci, Zibo 255000, Peoples R China

2.Minist Agr & Rural Affairs PR China, Inst Environm & Sustainable Dev Agr, Key Lab Low carbon Green Agr North China, CAAS, Beijing 100081, Peoples R China

3.Shandong Univ Technol, Branch State Key Lab Woody Oil Resources Utilizat, Zibo 255000, Peoples R China

4.Shandong Univ Technol, Shandong Res Ctr Engn & Technol Clean Energy, Zibo 255000, Peoples R China

关键词： Hydrothermal humification; Agricultural waste treatment; Green vitriol; Humic acid; Hydroxyl radical

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2025 年 13 卷 1 期

页码：

收录情况： SCI

摘要： Artificial humic acid (A-HA) produced from biowaste via hydrothermal conversion demonstrates as a promising advanced soil organic matter supplement. However, its low production yield, and poor physicochemical properties, such as high molecular weight and inert function groups, limit the practical application. This study investigated the potential of green vitriol (GV) on stimulate A-HA production and modify the its qualities. The yield of A-HA increased from 21.87 wt% to 27.84 wt% with a ratio of biomass to GV was 6 at 220 degrees C, while the optimum proportion of A-HA in hydrochar was increased by 13.57 +/- 11.06 wt% compared to the control at a temperature of 280 degrees C and a 3:1 addition ratio. In addition, the A-HA molecular weight decreased, and oxygencontaining functional groups (i.e., hydroxyl and carboxyl groups) increased with GV addition, enhancing its the reactivity and hydrophilicity. The related promotion mechanism was proposed, which the oxidative decomposition and humification of difficult-to-break-down substances facilitated by hydroxyl radical(& sdot;OH) from the Fenton-like reaction of GV with water. This study helpfully presents a novel strategy for promote production of sustainable and high-quality A-HA.

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