Use of activated carbon obtained from sugarcane straw for PAH adsorption - a comparative study with commercial materials

This work evaluates the performance of activated carbon obtained from sugarcane straw (SCAC) as an adsorbent for polyaromatic hydrocarbons (PAHs) present in model wastewater. Two commercial samples of activated carbons with different textural properties were also studied for comparison. The activate...

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Bibliographic Details
Published in:Environmental technology 2022-03, Vol.43 (6), p.861-875
Main Authors: Alves, Lais S., Ferreira Neto, Virgílio J. M., Costa, Thiago S. B., Gaspar, Alexandre B., Mendes, Fabiana M. T., Luna, Aderval S., Henriques, Cristiane A.
Format: Article
Language:English
Subjects:
Activated carbon
Adsorbents
Adsorption
Biomass
biomass waste
Carbon
Charcoal
Comparative studies
Fluoranthene
Fluorene
Kinetics
Naphthalene
PAH
Phenanthrene
Polyaromatic hydrocarbons
Polycyclic aromatic hydrocarbons
Porosity
Rate constants
Saccharum
Straw
Sugarcane
Sugarcane straw
Waste Water
Wastewater
Water Pollutants, Chemical - analysis
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Summary:This work evaluates the performance of activated carbon obtained from sugarcane straw (SCAC) as an adsorbent for polyaromatic hydrocarbons (PAHs) present in model wastewater. Two commercial samples of activated carbons with different textural properties were also studied for comparison. The activated carbon prepared from sugarcane straw presents a well-developed porosity with a high surface area, which was comparable to that of one of the commercial samples studied. For all the studied carbons, adsorption followed pseudo-second-order kinetics, and the higher rate constants were found for the SCAC sample for the four PAHs. Sips and Hill isotherms best fitted the adsorption equilibrium data of the PAHs on all activated carbons investigated. The activated carbon obtained from sugarcane straw (SCAC) presented a higher adsorption capacity (2.08 mmol g −1 for naphthalene, 1.26 mmol g −1 for fluorene, 1.14 mmol g −1 for phenanthrene, and 0.98 mmol g −1 for fluoranthene) when compared to the commercial carbon samples studied in this work as well as for those related in the literature. It confirms that its use of SCAC as an adsorbent for PAHs is a promising application for the valorization of this biomass waste.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330.2020.1807611