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

被引：0

作者：

Wang, Baofeng ^{[1
,2
]}

Chen, Yunxiao ^{[1
,2
]}

Guo, Yaxin ^{[1
,2
]}

Xue, Mukun ^{[1
,2
]}

Zhang, Huirong ^{[1
,2
]}

Cui, Jinglei ^{[1
,2
]}

Wang, Jiawei ^{[1
,2
]}

Guo, Yanxia ^{[1
,2
]}

机构：

[1] Institute of Resources and Environment Engineering, Shanxi University, Shanxi, Taiyuan

来源：

Bioresource Technology | 2025年 / 436卷

基金：

中国国家自然科学基金;

关键词：

Chemical sludge; Co-hydrothermal carbonization; Co-pyrolysis; Corncob; Microwave-assisted-treatment; Phosphorus;

D O I：

10.1016/j.biortech.2025.132987

中图分类号：

学科分类号：

摘要：

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. © 2025 Elsevier Ltd

引用

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