Carbon adsorbents from spent coffee for removal of methylene blue and methyl orange from water
- Activated carbons (ACs) were prepared from dried spent coffee (SCD), a biological waste product, to produce adsorbents for methylene blue (MB) and methyl orange (MO) from aqueous solution. Pre-pyrolysis activation of SCD was achieved via treatment of the SCD with aqueous sodium hydroxide solutions at 90 °C. Pyrolysis of the pretreated SCD at 500 °C for 1 h produced powders with typical characteristics of AC suitable and effective for dye adsorption. As an alternative to the rather harsh base treatment, calcium carbonate powder, a very common and abundant resource, was also studied as an activator. Mixtures of SCD and CaCO3 (1:1 w/w) yielded effective ACs for MO and MB removal upon pyrolysis needing only small amounts of AC to clear the solutions. A selectivity of the adsorption process toward anionic (MO) or cationic (MB) dyes was not observed.
Author details: | Inga BlockORCiDGND, Christina GünterGND, Alysson Duarte Rodrigues, Silvia PaaschGND, Peter Hesemann, Andreas TaubertORCiDGND |
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DOI: | https://doi.org/10.3390/ma14143996 |
ISSN: | 1996-1944 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/34300916 |
Title of parent work (English): | Materials / Molecular Diversity Preservation International |
Publisher: | Molecular Diversity Preservation International |
Place of publishing: | Basel |
Publication type: | Article |
Language: | English |
Date of first publication: | 2021/05/20 |
Publication year: | 2021 |
Release date: | 2021/10/15 |
Tag: | activated carbon; calcium carbonate; dye adsorption; dye removal; methyl orange; methylene blue; spent coffee; water; water treatment |
Volume: | 14 |
Issue: | 14 |
Article number: | 3996 |
Number of pages: | 18 |
Funding institution: | Universität Potsdam |
Funding institution: | University of Potsdam |
Funding institution: | Deutsche Forschungsgemeinschaft, German Research Foundation (DFG) |
Funding institution: | Open Access Publishing Fund of University of Potsdam |
Funding number: | PA 2021_068 |
Funding number: | 53170000 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften | |
DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
6 Technik, Medizin, angewandte Wissenschaften / 60 Technik / 600 Technik, Technologie | |
Peer review: | Referiert |
Grantor: | Publikationsfonds der Universität Potsdam |
Publishing method: | Open Access / Gold Open-Access |
DOAJ gelistet | |
License (German): | CC-BY - Namensnennung 4.0 International |
External remark: | Zweitveröffentlichung in der Schriftenreihe Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe ; 1155 |