Chemically activated high grade nanoporous carbons from low density renewable biomass (Agave sisalana) for the removal of pharmaceuticals
Open accessAbstract
Hypothesis Enlarging the range of viable nanoporous carbon precursors, namely by the acid treatment of low density biomass residues, can overcome issues related with the availability and quality of raw materials that have potential impact on cost and quality grade of the final product.Experiments Nanoporous carbons were prepared following a two-step process: H 2 SO 4 digestion/polycondensation of biomass waste (Agave sisalana, sisal) at temperature below 100 °C and atmospheric pressure to obtain acid-chars that were further chemically activated with KOH or K 2 CO 3. Selected synthesized nanoporous carbons were tested for the removal of pharmaceutical compounds - ibuprofen and iopamidol - in aqueous solutions.Findings The structure and density of the acid-chars are highly dependent on the concentration of H 2 SO 4 used in the digestion and polycondensation steps. An adequate choice of the acid-char synthesis conditions, activating agent and contact method allowed to feature nanoporous carbons with specific surface areas ranging from 600 to 2300 m 2 g-1 and apparent densities reaching 600 kg m-3. The adsorption capacity of a sample obtained by KOH-activation for the removal of micropollutants from water was twice higher than the value attained by a golden activated carbon (Cabot-Norit) commercialized for this specific purpose.
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Activated carbons are effective for removing pharmaceuticals, natural organic matter, heavy metals, and nutrients from different types of wastewater.
“For this reason, ACs are effective for removing pharmaceuticals (Mestre et al., 2019), natural organic matter (Kozyatnyk et al., 2014), heavy metals (Cao et al., 2019), and nutrients from different types of wastewater (Riley et al., 2018).”
From Use of biochar and Moringa oleifera in greywater treatment to remove heavy metals and contaminants of emerging concern (2023) · cites this paper as Mestre et al., 2019
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“For this reason, ACs are effective for removing pharmaceuticals (Mestre et al., 2019), natural organic matter (Kozyatnyk et al., 2014), heavy metals (Cao et al., 2019), and nutrients from different types of wastewater (Riley et al., 2018).”
Background
- Authors
- Mestre, A. S., Hesse, F., Freire, C., Ania, C. O., & Carvalho, A. P.
- Affiliations
- University of Lisbon (PT)
- Universidade do Porto (PT)
- Université d'Orléans (FR)
- Corresponding author
- Mestre, Ana S.
- Carvalho, Ana P.
- Venue
- Journal of Colloid and Interface Science
- Publisher
- Elsevier BV
- Published
- 2019-02
- Volume
- 536
- Pages
- 681-693
- ISSN
- 0021-9797 (ISSN-L)
- OpenAlex
- W2898613443
- Cited by
- 57
- References
- 42
- Citations by year
- 2026: 5 · 2024: 9 · 2023: 9 · 2022: 8 · 2021: 11 · 2020: 7 · 2019: 6 · 2018: 2
- FWCI
- 2.84
- Type
- journal article
- Language
- en
- Open access
- green
- hal.science
- Licence
- Locations
- Journal of Colloid and Interface Science (publishedVersion)
- PubMed (publishedVersion)
- HAL (submittedVersion, other-oa)
- DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion, cc-by-nc-nd)
- Funders
- Fundação para a Ciência e a Tecnologia (SFRH/BPD/86693/2012)
- Rede de Química e Tecnologia
- European Regional Development Fund (PT2020)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Physical Sciences › Chemistry › Spectroscopy › Adsorption, diffusion, and thermodynamic properties of materials
- Keywords
- nanoporous carbon, sisal, acid treatment, sulfuric acid digestion, polycondensation, KOH activation, K2CO3 activation, chemically activated carbon, pharmaceutical removal, ibuprofen, iopamidol, micropollutant adsorption, biomass waste valorization, specific surface area
- MeSH terms
- Carbon, Pharmaceutical Preparations, Particle Size, Surface Properties, Porosity, Biomass, Agave, Nanoparticles
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