| Title: |
Carbon Adsorbents from Spent Coffee for Removal of Methylene Blue and Methyl Orange from Water |
| Authors: |
Block, Inga; Günter, Christina; Duarte Rodrigues, Alysson; Paasch, Silvia; Hesemann, Peter; Taubert, Andreas |
| Contributors: |
University of Potsdam = Universität Potsdam; Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM); Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS); Technische Universität Dresden = Dresden University of Technology (TU Dresden) |
| Source: |
ISSN: 1996-1944 ; Materials ; https://hal.science/hal-03304059 ; Materials, 2021, 14 (14), pp.3996. ⟨10.3390/ma14143996⟩. |
| Publisher Information: |
CCSD; MDPI |
| Publication Year: |
2021 |
| Collection: |
Université de Montpellier: HAL |
| Subject Terms: |
water; dye removal; water treatment; activated carbon; calcium carbonate; methyl orange; methylene blue; dye adsorption; spent coffee; [CHIM.MATE]Chemical Sciences/Material chemistry; [SDE.IE]Environmental Sciences/Environmental Engineering |
| Description: |
International audience ; 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. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.3390/ma14143996 |
| Availability: |
https://hal.science/hal-03304059; https://hal.science/hal-03304059v1/document; https://hal.science/hal-03304059v1/file/materials-14-03996-v3.pdf; https://doi.org/10.3390/ma14143996 |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.F1B6EE3A |
| Database: |
BASE |