Alkaline-thermal synergistic activation of persulfate for sawdust hour-level humification to prepare fulvic-like-acid fertilizer

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-03-10 DOI:10.1016/j.biortech.2025.132388

Dongfang Wang , Xinyan Chen , Jing Zhang , Jia Xu , Xianghai Kong , Jinghong Ye , Rongjun Zhang , Huiqun Fan , Li Liu , Xiuping Zhan , Yan Qin , He Xu , Yanping Zhu , Dongqing Cai

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Abstract

Sawdust is a by-product of wood processing and it was rapidly humified with K₂S₂O₈ under alkaline-thermal synergistic activation to produce a fulvic-like-acid (FLA) organic fertilizer (SFOF) in this study. The optimum conditions were K₂S₂O₈: KOH mass ratio of 1:2 and 150°C, meanwhile FLA yield could reach 180.3 mg/g in 2 h. The carboxylation, Maillard reaction, and aromatization processes occurred during sawdust humification. And then, SFOF was mixed with attapulgite and modified starch binder to get an organic fertilizer (SAM), and coated with amino silicone oil (ASO) to create a slow-release granule (SAM@ASO). The release mechanism of FLA from SAM@ASO was consistent with Ritger-Peppas release kinetics. SAM@ASO, with high biosafety, could promote water spinach growth and remediate acidic soil (pH from 4.9 to 6.3). This method offers a promising approach for sawdust utilization and a novel FLA-based organic fertilizer for acidic soil remediation.

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.