Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/49696
Title: Biochars produced from various agro-industrial by-products applied in Cr(VI) adsorption-reduction processes
Keywords: Pyrolysis
Adsorption
Waste reuse
Issue Date: 8-Nov-2021
Publisher: Taylor & Francis
Citation: PENIDO, E. S. et al. Biochars produced from various agro-industrial by-products applied in Cr(VI) adsorption-reduction processes. Journal of Environmental Science and Health Part A: Toxic/Hazardous Substances & Environmental Engineering, [S.l.], v. 56, n. 13, p. 1387-1396, 2021. DOI: 10.1080/10934529.2021.2000814.
Abstract: This study aimed to reuse different agro-industrial by-products (poultry litter, pig manure, sewage sludge and coffee husk) for biochar production and to evaluate their Cr(VI) removal capacities in aqueous medium. The biochars showed different morphologies with porous structures. The percentages of Cr(VI) removal from solution were higher in acid medium (pH = 2), reaching values up to 87%. For all biochars, Cr(VI) removal occurs via both adsorption and reduction, being a rapid (30 min) process, which fits best to the pseudo-second order kinetic model. The biochars, especially from coffee husk, were able to reduce up to 20% of Cr(VI) to Cr(III). The maximum Cr(VI) removal capacities ranged from 10.86 mg g−1 (sewage sludge biochar) to 18.52 mg g−1 (coffee husk biochar). Therefore, the production of biochars from the agro-industrial by-products using the same experimental conditions in one single study is important to compare the Cr(VI) removal capacities from different biomasses. Thus, this study explored the corresponding raw material without the need of further treatment. Biochars showed potential for environmental applications considering Cr(VI)-polluted environments. It is hoped to provide basis to future studies using real wastewater samples.
URI: https://www.tandfonline.com/doi/abs/10.1080/10934529.2021.2000814
http://repositorio.ufla.br/jspui/handle/1/49696
Appears in Collections:DCS - Artigos publicados em periódicos

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