Aluminum carboxylate-based metal organic frameworks for effective adsorption of anionic azo dyes from aqueous media

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>High quantities of synthetic dyes are prevalent in wastewater, which are disposed into the environment without proper treatment. In this work, two types of aluminum based metal-organic frameworks, Al-FA (fumaric acid) and Al-SA (succinic acid), were synthesized using water as the solvent and employed for the adsorption of mono and di-azo dyes. Al-SA exhibited superior affinities towards both substrates compared to those of Al-FA, with maximum adsorption capacities of 559.28 and 332.48mg/g for mono and di-azo dyes, respectively. Overall findings insinuate that Al-SA can be considered as a promising candidate for efficient azo dye removing agent.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Aluminum based metal-organic frameworks were synthesized using water as the solvent. </LI> <LI> Aluminum-fumaric acid (Al-FA) and aluminum-succinic acid (Al-SA) were synthesized. </LI> <LI> Al-SA showed superior removal capability than that of Al-FA for mono and di-azo dyes. </LI> <LI> The adsorption performance obeyed the pseudo-second-order and the Sips models. </LI> <LI> Al-SA exhibits excellent adsorption capacity for employed substrates. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Aluminum-succinic acid MOFs can serve as a potent candidate for a universally applicable adsorbent in anionic azo dyes treatment.</P> <P>[DISPLAY OMISSION]</P>