Sulfonated Cellulose-Based Magnetic Composite as Useful Media for Water Remediation from Amine Pollutants

Abstract

Commercially available microcrystalline cellulose (MCC) was functionalized using chlorosulfonic acid, while iron oxide nanoparticles (IONPs) were adsorbed on the surface of the cellulose derivative by the Massart’s co-precipitation method. The obtained magnetite-decorated sulfate cellulose nanoparticles (MDSCNs) were characterized via Fourier transform infrared (FTIR) spectroscopy, scanning-electron microscopy (SEM), and elemental analysis, while the acidity of the functionalized cellulose was determined using an acid–base titration with phenolphthalein as an indicator. Furthermore, in order to determine the adsorptive power of the obtained composite, a series of analyses were performed on aqueous amine pollutants using flame ionization detection gas chromatography (GC-FID). The results of this study clearly show how a bio-compatible green polymer as cellulose can be easy functionalized in order to improve its chemical and physical properties, obtaining a magnetic composite useful in water purification. Adsorption percentages up to 90% and a very small amount of composite used (100 mg) proved how our material can be a powerful tool in environmental remediation.

Sponges from Plasma Treated Cellulose Nanofibers Grafted with Poly(ethylene glycol)methyl Ether Methacrylate

“…The functionalization of native cellulose has been studied in order to achieve specific characteristics, such as improved solubility and mechanical strength or reduced hydrophilicity. Well-established procedures for surface chemical functionalization of cellulose include silylation [ 3 ], acetylation [ 4 ], oxidation [ 5 ], amination [ 6 ], sulfonation [ 7 , 8 ], and polymer grafting reactions. The cellulose modification with different monomers and macromonomers is a feasible way to change its physical and chemical characteristics and has been the subject of many works.…”

Green-inspired synthetic drives for organophosphorus compounds under solvent-free conditions

“…Cellulose-SO3H has recently been reported as a useful solid-acid organocatalyst for many organic transformations. [84][85][86][87][88] Reddy and his group utilized this eco-friendly solid-acid catalyst for the synthesis of a diverse series of α-aminophosphonates (4) from a one-pot, three-component reaction between aromatic aldehydes (1), aromatic amines (2) and diethyl phosphonate (3) under solvent-free conditions at roomtemperature (Scheme 1). 89 Operational simplicity, use of eco-friendly and reusable organocatalysts, and good-to-excellent yields with short reaction times are major advantages of this protocol.…”

Recent Progress in Catalytic Synthesis of 1,2,3-Triazoles

“…In fact, mesoporous materials based on silica have gained much interest in the last years as versatile support for diverse metallic heterogeneous catalysts [38]. In addition, metal nanoparticles (MNPs) combined with eco-compatible materials have been used as composites useful in environmental remediation [39,40]. In particular, this zinc-supported catalyst was obtained by covalent immobilization of 2-hydroxy-acetophenone on silica functionalized with aminopropyl groups and subsequent metalation with ZnCl 2 (8, SiO 2 @APTES@2HAP-Zn).…”