3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism
Edmo Henrique Martins Cavalcante, Iuri Custodio Montes Candido, Helinando Pequeno de Oliveira, Kamilla Barreto Silveira, Thiago Víctor de Souza Álvares, Éder C. Lima, Mikael Thyrel, Sylvia H. Larsson, Glaydson S. dos Reis
Abstract
. The temperature positively affected the MO removal, and the thermodynamic studies indicated that the adsorption of MO onto APTES-functionalized biomass was spontaneous and endothermic, and enthalpy is driven in the physisorption mode. The regeneration performance revealed that the APTES-functionalized biomass material could be easily recycled and reused by maintaining very good performance even after five cycles. The adsorbent material was also employed to treat two simulated dye house effluents, which showed 48% removal. At last, the APTES biomass-based material may find significant applications as a multifunctional adsorbent and can be used further to separate pollutants from wastewater.