Journal
SUSTAINABILITY
Volume 12, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/su12208668
Keywords
co-pyrolysis; alkaline activating agent; Cu(II) adsorption; porous structure; photocatalysis
Funding
- National Key Research and Development Projects [ZX20200121]
- Fundamental Research Funds for the Central Universities [N180112012]
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Municipal sewage sludge (MSS) and hazelnut shells were selected for co-pyrolysis and chemically activated with K2CO3 in a N-2 atmosphere. The biochar was then modified by photocatalysis. Hazelnut shells, as a solid waste, were selected as a carbon source additive because of its high cellulose content and similar structure to natural wood. Using hazelnut shells could increase the specific surface area, enhance the porosity, and improve the adsorption capacity of the biochar. Hazelnut shells could also reduce the content of heavy metals in the raw biochar materials, along with increasing the ecological security of biochar and contributing to its further development and utilization. FTIR was used to study the changes in the functional groups on the biochar surface. The layered porous structure of the biochar was observed by SEM. The Cu(II) adsorption capacity of the biochar was 42.28 mg/g after 24 h. The Langmuir and pseudo-second-order models effectively described Cu(II) adsorption.
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