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A “Seawater-in-Sludge” approach for capacitive biochar production via the alkaline and alkaline earth metals activation
Li, Xiling1; Hao, Tianwei2; Tang, Yuxin3; Chen, Guanghao1,4,5,6
2021-02-01
Source PublicationFrontiers of Environmental Science and Engineering
ISSN2095-2201
Volume15Issue:1
Abstract

Sewage sludge is a potential precursor for biochar production, but its effective utilization involves costly activation steps. To modify biochar properties while ensuring cost-effectiveness, we examined the feasibility of using seawater as an agent to activate biochar produced from sewage sludge. In our proof-of-concept study, seawater was proven to be an effective activation agent for biochar production, achieving a surface area of 480.3 m/g with hierarchical porosity distribution. Benefited from our design, the catalytic effect of seawater increased not only the surface area but also the graphitization degree of biochar when comparing the pyrolysis of sewage sludge without seawater. This leads to seawater activated biochar electrodes with lower resistance, higher capacitance of 113.9 F/g comparing with control groups without seawater. Leveraging the global increase in the salinity of groundwater, especially in coastal areas, these findings provide an opportunity for recovering a valuable carbon resource from sludge.

KeywordBiochar Capacitor Recourse Recovery Seawater Sewage Sludge
DOI10.1007/s11783-020-1295-0
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEnvironmental Sciences & Ecology ; Engineering
WOS SubjectEngineering ; Environmental Sciences & Ecology
WOS IDWOS:000551508400001
Scopus ID2-s2.0-85088463981
Fulltext Access
FWCI1.2177565
Citation statistics
Document TypeJournal article
CollectionFaculty of Science and Technology
Corresponding AuthorHao, Tianwei
Affiliation1.Department of Civil & Environmental Engineering, The Hong Kong University of Science and Technology, 999077, Hong Kong
2.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macao, 999078, Macao
3.Institute of Applied Physics and Materials Engineering, University of Macao, 999078, Macao
4.Water Technology Center, The Hong Kong University of Science and Technology, 999077, Hong Kong
5.Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science and Technology, 999077, Hong Kong
6.Wastewater Treatment Laboratory, FYT Graduate School, The Hong Kong University of Science and Technology, Guangzhou, 511458, China
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Li, Xiling,Hao, Tianwei,Tang, Yuxin,et al. A “Seawater-in-Sludge” approach for capacitive biochar production via the alkaline and alkaline earth metals activation[J]. Frontiers of Environmental Science and Engineering,2021,15(1).
APA Li, Xiling,Hao, Tianwei,Tang, Yuxin,&Chen, Guanghao.(2021).A “Seawater-in-Sludge” approach for capacitive biochar production via the alkaline and alkaline earth metals activation.Frontiers of Environmental Science and Engineering,15(1).
MLA Li, Xiling,et al."A “Seawater-in-Sludge” approach for capacitive biochar production via the alkaline and alkaline earth metals activation".Frontiers of Environmental Science and Engineering 15.1(2021).
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