Application of Super-Amphiphilic Silica-Nanogel Composites for Fast Removal of Water Pollutants

Abstract

This work first reports the preparation of super-amphiphilic silica-nanogel composites to reduce the contact angle of water to increase the diffusion of pollutant into adsorbents. In this respect, the silica nanoparticles were encapsulated into nanogels based on ionic and nonionic polyacrylamides by dispersion polymerization technique. The morphologies and the dispersion stability of nanogel composites were investigated to clarify the ability of silica-nanogel composites to adsorb at different interfaces. The feasibility of silica polyacrylamide nanogel composites to act as a high-performance adsorbent for removal of methylene blue (MB) dye and heavy metals (Co 2+ and Ni 2+ ) from aqueous solution was investigated. The surface tension, contact angle, average pore size, and zeta potential of the silica-nanogel composites have been evaluated. The MB dye and heavy metal adsorption capacity achieved Q max = 438-387 mg/g which is considerably high. The adsorption capacity results are explained from the changes in the morphology of the silica surfaces as recorded from scanning electron microscopy (SEM).

Enhanced Performance of Magnetic Graphene Oxide-Immobilized Laccase and Its Application for the Decolorization of Dyes

“…Most dyes and pigments are toxic, complex, have low biodegradability, and are carcinogenic. They have been shown to cause much damage due to the resistance to degradation and the perilous affect to plants, aquatic organisms, and human beings [ 20 ]. Triphenylmethane dyes consisting of crystal violet (CV) and malachite green (MG) and azo dyes such as brilliant green (BG) were all widely used in various industries.…”

Amphiphilic micro‐ and nanogels: Combining properties from internal hydrogel networks, solid particles, and micellar aggregates

“…The benefits of multivalent interactions were demonstrated by the group of Atta who developed hybrid amphiphilic nanogels containing silica nanoparticles as hard crosslinking domains. 210 Stable incorporation of these inorganic materials into a polymeric gel network was achieved by using the large number of hydroxyl groups on the particle surface to form multiple hydrogen bonds with amide bonds in the polymer network. For this, acrylamide (AAm) and sodium AMPS were copolymerized in the presence of the crosslinker, BIS, and the silica nanoparticles, thus ensuring the successful incorporation.…”

Application of Functionalized Iron Magnetic Nanoparticles (γfe2o3) by Humic Acid for Elimination of Anionic and Cationic Pollutants from Wastewater تطبیق حبیبات أکسید الحدید المغناطیسیه المتناهیة الصغر والمشبعه بحمض الهیومیک فی ازالة الملوثات الانیونیه والکاتیونیه من المیاه العادمه

“…Adsorption is considered as most common and effective technique for elimination of different toxic metals from wastewater for economic reasons. There are many adsorbent materials were used for metal removal from wastewater such as adsorption onto activated carbon (Khezami and Capart, 2005), hydrotalcite (Lazaridis and Asouhidou, 2003), coconut husk (Tan et al, 1993), maple sawdust (Yu et al, 2003), biogas residual slurry (Namasivayam and Yamuna, 1995), sugarcane pulp residue (Yang et al, 2009), cellulosic graft copolymers (Eromosele and Bayero, 2000), cross-linked chitosan (Rojas et al 2004), lignin (Yun et al, 2008), red mud (Pradhan et al, 1999) andSuper-Amphiphilic Silica-Nanogel Composites (Atta et al, 2016). Many scientists had developed novel methods for production and employment of iron magnetic nanomaterials (FeMNPs) with marked characteristics and utilities, due to their diameter in nano size, large surface area to volume ratios and super-magnetism properties (McHenry and Laughlin, 2000;Afkhamiet al, 2010 andPan et al, 2010).…”