Produção Nacional
Revisado por pares
Preparation of hybrids of wood sawdust with 3-aminopropyl-triethoxysilane. Application as an adsorbent to remove Reactive Blue 4 dye from wastewater effluents
2021; Elsevier BV; Volume: 125; Linguagem: Inglês
10.1016/j.jtice.2021.06.007
ISSN1876-1089
AutoresRoberta A. Teixeira, Éder C. Lima, Antônio Domingues Benetti, Pascal S. Thue, Mariene R. Cunha, Nilton Fabiano Gelos Mendes Cimirro, Farooq Sher, Mohammad Hadi Dehghani, Glaydson S. dos Reis, Guilherme Luiz Dotto,
Tópico(s)Nanomaterials for catalytic reactions
ResumoBiomass-based materials present low sorption capacity. In order to overcome this disadvantage, chemical modification of these materials is required. Hybrids of biomass-based materials were obtained by reacting (25%-200% weight) 3-aminopropyl-triethoxysilane (APTES) with the biomass Ayous wood sawdust (AW), obtaining the hybrid materials [email protected], [email protected], [email protected], [email protected], and [email protected], that were characterized by hydrophobic/hydrophilic balance, CHN elemental analysis, surface area, TGA, FTIR, and pHpzc. For screening purposes, the five materials were tested as adsorbents to remove reactive blue 4 (RB-4) from water. The results showed that [email protected] attained the maximum removal of RB-4. The kinetics and equilibrium data were suitably fitted by the nonlinear General-order kinetic (GO) and Liu equilibrium adsorption models. The maximum amount adsorbed of RB-4 dye was 415.1 mg g − 1 using [email protected] (50 °C). An increase in the Qmax value of [email protected] concerning unmodified AW attained up to 21.6 times. The ΔG° and ΔH° indicated that the adsorption processes of RB-4 onto adsorbents are endothermic and spontaneous, and the magnitude of enthalpy of adsorption (25.10 kJ mol−1) is compatible with the electrostatic attraction mechanism. The adsorbents’ applicability for treating simulated dye effluents showed an excellent efficiency attaining 98.66% removal of the effluent.
Referência(s)