Preparation of hybrids of wood sawdust with 3-aminopropyl-triethoxysilane. Application as an adsorbent to remove reactive blue 4 dye from wastewater effluents

Teixeira, RA, Lima, EC, Benetti, AD, Thue, PS, Cunha, MR, Cimirro, NFGM, Sher, F ORCID: https://orcid.org/0000-0003-2890-5912, Dehghani, MH, dos Reis, GS and Dotto, GL, 2021. Preparation of hybrids of wood sawdust with 3-aminopropyl-triethoxysilane. Application as an adsorbent to remove reactive blue 4 dye from wastewater effluents. Journal of the Taiwan Institute of Chemical Engineers, 125, pp. 141-152. ISSN 1876-1070

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Abstract

Background: Biomass-based materials present low sorption capacity. In order to overcome this disadvantage, chemical modification of these materials is required.

Methods: 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 AW@APTES-0.25, AW@APTES-0.50, AW@APTES-1.0, AW@APTES-1.5, and AW@APTES-2.0, that were characterized by hydrophobic/hydrophilic balance, CHN elemental analysis, surface area, TGA, FTIR, and pHpzc.

Significant findings: For screening purposes, the five materials were tested as adsorbents to remove reactive blue 4 (RB-4) from water. The results showed that AW@APTES-0.5 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 AW@APTES-0.5 (50 °C). An increase in the Qmax value of AW@APTES-0.5 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.

Item Type:	Journal article
Publication Title:	Journal of the Taiwan Institute of Chemical Engineers
Creators:	Teixeira, R.A., Lima, E.C., Benetti, A.D., Thue, P.S., Cunha, M.R., Cimirro, N.F.G.M., Sher, F., Dehghani, M.H., dos Reis, G.S. and Dotto, G.L.
Publisher:	Taiwan Institute of Chemical Engineers
Date:	2021
Volume:	125
ISSN:	1876-1070
Identifiers:	Number Type 10.1016/j.jtice.2021.06.007 DOI 1489764 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	08 Mar 2022 12:29
Last Modified:	20 Jun 2023 03:00
URI:	https://irep.ntu.ac.uk/id/eprint/45818

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