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BIBTEX RIS

Ecotoxicological Effects of Biochar Obtained from Spent Coffee Grounds

2022; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímer; Volume: 25; Issue: suppl 2 Linguagem: Inglês

10.1590/1980-5373-mr-2022-0013

ISSN

1980-5373

Autores

Lorrana Zélia Martins de Souza, Bruna Cristina Pinto, Adriana Barboza Alves, Amanda Vanessa de Oliveira Ribeiro, Débora Cristina Teodoro Feliciano, Luisa Heringer da Silva, Thiago Tales Moraes Dias, Murat Yılmaz, Magno André de Oliveira, Augusto César da Silva Bezerra, Osânia Emerenciano Ferreira, Robson Pereira de Lima, Lúcia Pinheiro Santos Pimenta, Alan Rodrigues Teixeira Machado,

Tópico(s)

Coffee research and impacts

Resumo

The objective of this work is to investigate the conversion of spent coffee grounds (SCG) into biochar (BSC) and the ecotoxicological effects of the product obtained. The SCG and BSC were characterized by characterized by different techniques (TGA/DTG, FTIR, XRD, SEM, EDS, and EDXRF). Proton Nuclear Magnetic Resonance (1H NMR) was used to characterize the aqueous extract of BSC. The inhibitory effect on lettuce (Lactuca sativa) germination was investigated. Besides, antimicrobial activity evaluation trials were conducted with Azospirillum brasilense and Trichoderma spp. The results showed that in the BSC production process, the extractives and lignocellulosic components in the SCG were partly decomposed. Tests conducted with microorganisms did not reveal any toxic effect of BSC. However, high phytotoxicity against lettuce was recorded for rate 100 t/ha of BSC. This effect was associated with the presence of carboxylic acids identified by 1H NMR in the BSC extract aqueous.

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