| Texto completo | |
| Autor(es): |
Maia, Lana S.
;
Neto, Thalita da Silva
;
Perluxo, Julia Dornelas
;
do Carmo, Flavia Lima
;
Rosa, Derval S.
;
Mulinari, Daniella R.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY; v. 30, n. 8, p. 15-pg., 2024-09-21. |
| Resumo | |
Aquatic environments have faced significant and severe impacts in recent years due to oil spills and chemical leaks in oceanic and river ecosystems. Because of this, several studies have aimed to develop sustainable adsorbents with hydrophobic characteristics. This research focuses on creating eco-friendly sorbents using macadamia nutshell waste (MW) incorporated into castor oil-based polyurethane foam at different proportions (5, 10, 15, and 20 wt%). The study also evaluates the absorption efficiency of these sorbents for different oil types, including crude oils (crude oil CB, crude oil SB, diesel S10, and diesel S500). The eco-friendly sorbents (biocomposites) were characterized by optical microscopy, scanning electron microscopy, density, and contact angle analyses. Results revealed that the pore morphology of sorbents changed to a partial closed-cell structure with a smaller pore size. Additionally, the biocomposites exhibited a higher contact angle (119.1 degrees +/- 0.4) compared to pure polyurethane (PU). The oil absorption efficiency by biocomposites showed maximum sorption of 7.3, 7.1, 5.1, and 3.9 g.g-1 for crude oils (SB and CB), S10, and S500 diesel, respectively. The absorption results showed that the biocomposites showed good removal of heavy oils (crude oil) compared to light oils (diesel S10 and S500). Among the isotherm models used, the Langmuir model demonstrated the most accurate fit and estimated a maximum adsorption capacity of 5.39, 4.23, 3.24, and 2.69 g.g-1 for crude oil CB, crude oil SB, S10, and S500 diesel respectively, using PU + 20% MW. Additionally, PU + 20% MW showed excellent reusability during 30, 30, 30, and 10 cycles of sorption-desorption for crude oil CB, crude oil SB, S10, and S500 diesel, respectively. (AU) | |
| Processo FAPESP: | 21/14714-1 - EMU concedido no processo 2020/13703-3 (projeto temático): Cromatógrafo de Íons Modular 940 Professional IC Vario |
| Beneficiário: | Derval dos Santos Rosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |
| Processo FAPESP: | 20/13703-3 - Materiais porosos ecológicos para a recuperação e reavaliação de metais recuperados de água contaminada |
| Beneficiário: | Derval dos Santos Rosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 23/14598-7 - Desenvolvimento de aerogéis contendo microfibras de celulose e argila para remoção de íons metálicos presentes em águas contaminadas |
| Beneficiário: | Lana Siqueira Maia |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 19/04269-0 - Avaliação do potencial de novas nanopartículas poliméricas como agentes de encapsulação e liberação simultânea de um agente fotossensibilizador e um princípio ativo quimioterápico |
| Beneficiário: | Simone de Fátima Medeiros Sampaio |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |