New role of radical-induced polymerization: Base/self-heating synergistically activate persulfate to boost food waste humification
文献类型： 外文期刊
作者： Cai, Dongqing 1 ; Pan, Xiaoya 1 ; Wang, Chengjin 2 ; Shu, Shihu 1 ; Zhu, Pengjin 3 ; Zhou, Chunhuo 4 ; Wang, Dongfang 1 ; Xu, He 1 ; Liu, Yanbiao 1 ; Chu, Wenhai 5 ; Li, Xiang 1 ; Zhu, Yanping 1 ;
作者机构： 1.Donghua Univ, Coll Environm Sci & Engn, Shanghai 201620, Peoples R China
2.Univ Manitoba, Dept Civil Engn, Winnipeg, MB R3T 5V6, Canada
3.Guangxi Subtrop Crops Res Inst, Nanning 530000, Peoples R China
4.Jiangxi Agr Univ, Coll Land Resources & Environm, Nanchang 330045, Peoples R China
5.Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China
关键词： Base-activated persulfate; Radical-induced polymerization; Food waste; Fulvic-like acid; Environmental chemistry
期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：10.0； 五年影响因子：10.7 ）
ISSN： 0959-6526
年卷期： 2024 年 475 卷
页码：
收录情况： SCI
摘要： Radical-induced polymerization in persulfate (PS)-based advanced oxidation process (AOP) is attracting attention in water decontamination. Herein, we revealed its new role in rapid recycling of perishable food wastes using KOH activated PS. A glucose (Glu) solution of 250 g C/L was applied to mimic the carbohydrate-rich raw material with 50-60% moisture in conventional composting, wherein boosted humification occurred after addition of solid KOH/PS. Intense heat release (from 25 to 79.4( degrees)C), mainly generated from KOH dissolving and exothermic radical chain polymerization, was observed within 2 min. Solid KOH addition contributed to synergistic PS activation by base and self-heating, realizing complete PS decomposition and fulvic like acid (FLA, 210.8 g C/L) formation within 10 min. Extracted FLA promoted cucumber seed germination and fresh weight of chickweeds by 40.0% and 128.3%, respectively. Identified center dot OH and SO4 center dot- played primary roles in FLA formation through aromatization, carboxylation, and polymerization, wherein several key reactive intermediates such as 5-hydroxymethylfurfural and aromatic radicals (i.e. 1,2,4-benzenetriol radical) were formed. Moreover, the humification process simultaneously produced K2SO4 (i.e. the end product of PS decomposition) which could be used as a typical K/S fertilizer. Scaling-up humification of waste cooked rice and fertilization results further supported the potential of solid KOH/PS in efficiently converting food wastes into FLA and K+-rich compound fertilizer.
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