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Updated: Jun 28, 2026

Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
Simultaneous adsorption of polycyclic aromatic hydrocarbons (PAHs) on biochar from sewage sludge
Natiele Kleemann1, Andrei Igansi1, Nauro Silveira1
1Chemistry and Food School, Federal University of Rio Grande-FURG, Km 8 Italia Avenue, Rio Grande, RS, 96203-900, Brazil.
Abstract:
PAHs are organic pollutants of great environmental persistence. This study produced biochar of sewage sludge from a treatment plant and used it as an adsorbent in a complex system containing 16 priority PAHs. The biochar was characterized by the morphology and elemental composition (SEM/EDS), specific surface area, and pore size using N2 adsorption-desorption (BET/BJH), crystallinity (DRX), functional groups (FTIR), and thermogravimetric degradation (DSC/DTG). The dosage effect showed that 90% of the PAHs were removed when SSB was 2 g L-1. Kinetic assays were performed using different SSB dosages. The most adequate model to represent the kinetic results was the Elovich. The adsorption capacity and removal percentage of the 16 emerging organic polycyclic aromatic hydrocarbons cited by the US EPA were evaluated individually. The highest adsorption capacity was verified for fluoranthene, pyrene, and phenanthrene, respectively, evidencing the electivity of this material for these compounds.
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