期刊
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
卷 104, 期 -, 页码 106-113出版社
ELSEVIER
DOI: 10.1016/j.jtice.2019.08.017
关键词
z Bentonite; Biochar; Co-pyrolysis; Dye; Macroalgae
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2016R1D1A1B03935962, NRF-2018R1A6A1A03024962]
The effect of bentonite-mineral co-pyrolysis in amounts of 5%, 10%, and 20% with macroalgae (Saccharina japonica; kelp) on the physicochemical property changes and dye adsorption of the bentonite/biochar composite was investigated. Mathematical relations to assess the contribution of mineral and biochar components of the bentonite/biochar composite on cationic, crystal violet (CV) and anionic, Congo red (CR) dye uptake were first developed via comparison with bentonite/biochar blends from stand-alone pyrolysis of kelp and bentonite. Results demonstrated that bentonite was successfully loaded into the biochar matrix, increased mesoporosity (2.67-12.7 nm), and simultaneously enhanced bio-oil (by 7.4%-35%) and biochar yields (by 6.0%-13.6%). The carbon sequestration potential increased by 27% on co-pyrolysis with 5% bentonite with an adsorption capacity value amongst the highest for CV (1275 mg/g); dominated by chemisorption. Mathematical derivations and calculations showed that co-pyrolysis enhanced adsorption capacity contribution of bentonite (f(q,PyB,co) > 0) on both dyes. Synergy comparison (r(q.co/sp)) between bentonite/biochar composites from the co-pyrolysis and stand-alone pyrolysis were comparable on CR and CV with 20% bentonite but superior for co-pyrolysis (r(q.co/sp)=1.79), on CR adsorption with 10% bentonite. Bentonite/biochar composite thus harbor potential as an effective wastewater treatment and carbon sequestration tool. (C) 2019 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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