title: 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 (Co2+and Ni2+) 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 Qmax= 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).
authors: Chemistry Department, College of Science, King Saud University, Riyadh 11541, Saudi Arabia. aatta@ksu.edu.sa.|College of Science, King Saud University, Riyadh 11541, Saudi Arabia. aatta@ksu.edu.sa.
authors: Ayman M
authors: AM
authors: Atta
authors: Chemistry Department, College of Science, King Saud University, Riyadh 11541, Saudi Arabia. hlohedan@ksu.edu.sa.
authors: Hamad A
authors: HA
authors: Al-Lohedan
authors: College of Science, King Saud University, Riyadh 11541, Saudi Arabia. atawfik@ksu.edu.sa.
authors: Ahmed M
authors: AM
authors: Tawfik
authors: Chemistry Department, College of Science, King Saud University, Riyadh 11541, Saudi Arabia. ao_ezzat@yahoo.com.
authors: Abdelrahman O
authors: AO
authors: Ezzat
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000327:Adsorption; D019216:Metals, Heavy / Q000737:chemistry; D008751:Methylene Blue / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D000080385:Nanogels; D011092:Polyethylene Glycols / Q000737:chemistry*; D011094:Polyethyleneimine / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D019216:Metals, Heavy; D008751:Methylene Blue; D000080385:Nanogels; D011092:Polyethylene Glycols; D011094:Polyethyleneimine; D012822:Silicon Dioxide; D014874:Water Pollutants, Chemical; D000099166:Polyacrylamides; C413692:polyethylene glycol polyethyleneimine nanogel
keywords: adsorption; composites; nanogel; silica; water purification