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 BlockORCiD, Christina GünterGND, Alysson Duarte Rodrigues, Silvia PaaschGND, Peter Hesemann, Andreas TaubertORCiDGND |
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URN: | urn:nbn:de:kobv:517-opus4-521653 |
DOI: | https://doi.org/10.25932/publishup-52165 |
ISSN: | 1866-8372 |
Title of parent work (German): | Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe |
Publication series (Volume number): | Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (1155) |
Publication type: | Postprint |
Language: | English |
Date of first publication: | 2021/05/20 |
Publication year: | 2021 |
Publishing institution: | Universität Potsdam |
Release date: | 2021/10/15 |
Tag: | activated carbon; calcium carbonate; dye adsorption; dye removal; methyl orange; methylene blue; spent coffee; water; water treatment |
Issue: | 14 |
Article number: | 3996 |
Number of pages: | 20 |
Source: | Materials 2021, 14, 3996. https://doi.org/10.3390/ma14143996 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Peer review: | Referiert |
Publishing method: | Open Access / Green Open-Access |
License (German): | CC-BY - Namensnennung 4.0 International |
External remark: | Bibliographieeintrag der Originalveröffentlichung/Quelle |