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dc.contributor.authorZhang, Yunhuien_US
dc.contributor.authorQin, Jundeen_US
dc.contributor.authorYi, Yaolinen_US
dc.identifier.citationZhang, Y., Qin, J. & Yi, Y. (2021). Biochar and hydrochar derived from freshwater sludge: characterization and possible applications. Science of the Total Environment, 763, 144550-.
dc.description.abstractFreshwater sludge (FS) is generated in large quantities during the production of drinking water every day. It is largely underutilized, and has long been filter pressed to sludge cake and then disposed of in landfills. The search for more economical and sustainable disposal or reuse options is urgently needed. Biochar and hydrochar are increasingly popular wastes derived materials with huge potential for soil improvement, environmental remediation, and mitigation of climate change, but there is a lack of research on the production of FS derived biochar and hydrochar. In this study, biochar was produced by pyrolysis at 300, 500 or 700 °C for 1 h, and hydrochar was produced by hydrothermal carbonization (HTC) at 140, 160, 180 or 200 °C for 4 h. Proximate analyses show that the biochar has a higher carbon stability and is possibly suitable for carbon sequestration, while the hydrochar contains more labile carbon structures. The ultimate analysis indicates that the surface hydrophobicity is in the order of: biochar > hydrochar > FS. The phytotoxicity tests indicate their positive effects on germination of wheat seeds. This study provides a new treatment to reuse numerous FS and put forward the possible applications of its carbonaceous products, which is expected to facilitate a circular economy and realize the zero-waste target.en_US
dc.relation.ispartofScience of the Total Environmenten_US
dc.rights© 2020 Elsevier B.V. All rights reserved.en_US
dc.subjectEngineering::Environmental engineeringen_US
dc.titleBiochar and hydrochar derived from freshwater sludge: characterization and possible applicationsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.subject.keywordsCarbonaceous Materialen_US
dc.subject.keywordsResource Utilizationen_US
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