Migration behavior of phosphorus during microwave-assisted co-hydrothermal carbonization and co-pyrolysis of chemical sludge and corncob

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

Bioresource Technology Pub Date : 2025-07-14 DOI:10.1016/j.biortech.2025.132987

Baofeng Wang , Yunxiao Chen , Yaxin Guo , Mukun Xue , Huirong Zhang , Jinglei Cui , Jiawei Wang , Yanxia Guo

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Abstract

Recycling of phosphorus (P) from chemical sludge (CS) is important for alleviating P resources shortage and solving P pollution. In this study, the transformation behavior and the mechanism of P during microwave-assisted co-hydrothermal carbonization (co-HTC) and co-pyrolysis of CS and corncob was investigated. The results showed that microwave could enhance the process of co-HTC and co-pyrolysis, and made P enriched in hydrochar and biochar. Microwaves made the content of orthophosphate (Ortho-P) and pyrophosphate (Pyro-P) in hydrochar and biochar increase, as well as making the organic phosphorus (OP) convert into inorganic phosphorus (IP). Meanwhile, the results also showed that P-containing minerals existed as Al-P and Fe-P in hydrochar and existed as Ca-P and Mg-P minerals in biochar. Furthermore, microwave assistance also could significantly improve the bioavailability of P. The results of this study may provide a basis for the P recovery from chemical sludge, as well as for clean and efficient utilization of hydrochar and biochar.

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微波辅助化学污泥与玉米芯共热炭化共热解过程中磷的迁移行为

化学污泥中磷的资源化利用对缓解磷资源短缺和解决磷污染具有重要意义。研究了微波助热炭（co-HTC）和玉米芯共热解过程中P的转化行为及机理。结果表明，微波能增强共htc和共热解过程，使氢炭和生物炭中的磷富集。微波使烃类和生物炭中正磷酸盐（orthop - p）和焦磷酸盐（pyrop - p）含量增加，并使有机磷（OP）转化为无机磷（IP）。同时，含磷矿物在烃类中以Al-P和Fe-P的形式存在，在生物炭中以Ca-P和Mg-P的形式存在。此外，微波辅助还能显著提高磷的生物利用度。本研究结果可为化学污泥中磷的回收，以及碳氢化合物和生物炭的清洁高效利用提供依据。

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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.