期刊
BIORESOURCE TECHNOLOGY
卷 287, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.121463
关键词
Composting; FeONPs; AOB and AOA; Nitrogen conservation; Microbial community
资金
- National Natural Science Foundation of China [51521006, 51378190, 51879100, 51408219]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
Composting amended with iron oxide nanoparticles (FeONPs, alpha-Fe2O3 and Fe3O4 NPs) were conducted to study the impacts of FeONPs on nitrogen conservation and microbial community. It was found that amendment of FeONPs, especially alpha-Fe2O3 NPs, reduced total nitrogen (TN) loss, and reserved more NH4+-N and mineral N. Pearson correlation analysis revealed that decrease of ammonia-oxidizing bacteria (AOB) in FeONPs treatments played more important role than ammonia-oxidizing archaea (AOA) in reserving more NH4+-N and mineral N, and reducing TN loss. Bacterial community composition at phylum level did not shift with addition of FeONPs. Firmicutes, Actinobacteria, and Proteobacteria were the three most dominant phyla in all treatments. Overall, this study provides a method to reduce TN loss and improve mineral N reservation during composting, and gives a deep insight into the role of AOB and AOA in nitrogen transformation.
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