Highly Efficient Sorption of Methyl Orange by a Metal–Organic Resin–Alginic Acid Composite. Issue 9 (14th September 2017)

• Record Type: Journal Article
• Authors: Pournara, Anastasia D.; Rapti, Sofia; Skliri, Euaggelia; Armatas, Gerasimos S.; Tsipis, Athanassios C.; Manos, Manolis J.
• Is Part Of: ChemPlusChem. Volume 82:Issue 9(2017)
• Page Start: 1188
• Page End: 1196
• Publication Date: 2017-09-14
• Subjects: dyes -- ion exchange -- metal–organic frameworks -- porous materials -- water treatment; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cplu.201700278
• Languages: English
• ISSNs: 2192-6506

Abstract

Abstract: The composite anion‐exchange materialMOR‐1–HA (metal–organic resin‐1–alginic acid) was investigated as sorbent for the capture of the methyl orange anion (MO − ) from aqueous solutions.MOR‐1–HA shows a remarkably high sorption capacity (up to 859 mg g −1 ) and rapid sorption kinetics, the fastest among the reported metal–organic sorbents. It is capable of absorbing MO − over a wide pH range (1–8) and, in addition, it exhibits significant MO − sorption affinity even in the presence of large excesses of competing anions (e.g., Cl −, NO3 −, SO4 2− ). The exceptional MO − ‐sorption properties ofMOR‐1–HA arise not only from its highly porous structure and easily exchangeable Cl − anions, but also from a multitude of interaction effects, such as electrostatic interactions between MO − and the NH3 + groups of the material, hydration/dehydration, hydrophobicity/hydrophilicity, size and capacity of generating lateral interactions, and intercalation as revealed by theoretical studies. An ion‐exchange column with a stationary phase containingMOR‐1–HA and silica sand showed high efficiency for the removal of MO − from various types of aqueous samples. The column can be readily regenerated and reused for many runs with minimal loss (2.3–9.3 %) of its exchange capacity. The simplicity of theMOR‐1–HA /sand column and its high regeneration capability and reusability make it particularly attractive for application in the remediation of MO − ‐contaminated industrial wastewater. Abstract : Waste not, want not : The composite anion‐exchange materialMOR‐1–HA (see structure) showed an exceptional sorption capacity for methyl orange (MO). For the first time, an ion‐exchange column containing a metal–organic sorbent was demonstrated to be highly efficient for the removal of dyes from wastewater.