Adsorption of N,N-dimethylamine from aqueous solutions by a metal organic framework, MOF – 235

Abstract

View references (22) Water-resistant MOF-235 was used to adsorb N,N-dimethylamine (DMA) from aqueous solutions. It was synthesized from terephthalic acid and FeCl3.6H2O under air-free conditions and characterized by its crystalline structure, functional groups and temperature resistance. The kinetic data results were best adjusted to the pseudo-second order model (R 2 >0.963). The best-fit isotherm, Langmuir model, suggested the adsorption of DMA is localized on homogenously distributed active sites on the surface. This fit was confirmed by the value of β = 1 on the Redlich-Peterson model. Our study suggests that the manipulation of novel materials such as MOF-235 promises new avenues for water treatment solutions. Schematic structure of MOF-235 and its application as adsorbent.

Effective Adsorptive Removal of Methylene Blue from Water by Didodecyldimethylammonium Bromide-Modified Brown Clay

“…Therefore, it can easily be understood that electrostatic interactions along with the nonpolar interactions are responsible for the increase in dye uptake up to pH 7, and the decrease in electrostatic forces of attraction due to the neutral sorbate surface is credited for maintaining MB sorption at a steady rate above pH 7. The same trend has been supported by the literature for MB sorption. , Consequently, the pH 7.0 has been reflected to be the optimum level because at this pH the maximum sorption capacity (123 ± 2.5 mg/g for BC and 163 ± 4.2 mg/g for DDAB-BC) has been observed.…”

“…The same trend has been supported by the literature for MB sorption. 30 , 31 Consequently, the pH 7.0 has been reflected to be the optimum level because at this pH the maximum sorption capacity (123 ± 2.5 mg/g for BC and 163 ± 4.2 mg/g for DDAB-BC) has been observed.…”

Metal–Organic Frameworks for the Removal of Emerging Organic Contaminants in Water

“…Another relevant MOF, applied on industrial contaminants adsorption, is the MOF-235(Fe) ([Fe 3 O-(bdc) 3 (DMF) 3 ][FeCl 4 ]; DMF, N,N-dimethylformamide; S BET ∼135 m 2 g −1 ; V p ∼0.07 cm 3 g −1 ). 327 The experimental DMA adsorption data were adjusted to the Elovich model, 328 and the model related with the location of the adsorbates in the active chemisorptive centers at the heterogeneous surface of the MOF. The maximum removal of DMA by MOF-235 was 663 mg g −1 .…”

“…This material presents a high ASA adsorption capacity (791 mg g –1 ) with a facile regeneration, which makes it a promising candidate for its application in the adsorptive removal of organoarsenic compounds. Another relevant MOF, applied on industrial contaminants adsorption, is the MOF-235­(Fe) ([Fe 3 O­(bdc) 3 (DMF) 3 ]­[FeCl 4 ]; DMF, N , N -dimethylformamide; S BET ∼135 m 2 g –1 ; V p ∼0.07 cm 3 g –1 ) . The experimental DMA adsorption data were adjusted to the Elovich model, and the model related with the location of the adsorbates in the active chemisorptive centers at the heterogeneous surface of the MOF.…”