Produção Nacional
PRODUCTION AND CHARACTERIZATION OF ACTIVATED BIOCHAR OF CÁSSIA FISTULA L. LEAVES
2020; UNIVERSIDADE DO SUL DE SANTA CATARINA; Volume: 9; Linguagem: Inglês
10.19177/rgsa.v9e02020800-815
ISSN2238-8753
AutoresFabíola Tomassoni, Elisângela Edila Schneider, Cristiane Lisboa Giroletti, Maria Eliza Nagel-Hassemer, Marı́a Ángeles Lobo Recio, Flávio Rubéns Lapolli,
Tópico(s)Adsorption and biosorption for pollutant removal
ResumoA new activated biochar was produced by carbonizing Cássia fistula L. leaves and its characterization was performed. Scanning Electron Microscopic (SEM) images of the activated biochar showed morphology with numerous irregular cavities and pores. BET surface area and total pore volume of produced adsorbent were 192 m².g-1 and 0.108 cm3.g-1, respectively. Mean porous diameter of the produced biochar was 2.263 nm, characterizing a mesoporous material. Crystallinity and functional groups of the adsorbent were determined by X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy analyses, respectively. The pH of zero charge point (pHzcp) observed was equal to 10, demonstrating that the activated biochar has a negative surface, which facilitates the adsorption of positively charged compounds in water and wastewater treatment. Tree leaves of Cássia fistula L. represent a promising raw material for activated biochar production, given their availability and characteristics of the adsorbent produced. The use of tree leaves for activated biochar production can reduce the operational costs of adsorption process, besides providing the use of a residue for a more noble purpose.
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