Selective mesoporous adsorbents for Ag+/Cu2+ separation

Abstract

Three different approaches, including (1) manipulating the site chemistry, (2) controlling the spacing between neighbouring sites and (3) altering the adsorbates by the use of chelates, were successfully used to prepare MCM-41 adsorbents with excellent selectivity for silver adsorption from solutions containing copper.

Application of AlMCM-41 for competitive adsorption of methylene blue and rhodamine B: Thermodynamic and kinetic studies

“…Due to the high surface area and nanometer sized pore of the mesoporous compounds, especially MCM-41 been believed the promising materials as adsorbents for various inorganic ions and organic dyes [9][10][11][12][13][14][15][16][17][18][19][20]. Incorporation of aluminum into the structure of MCM-41 materials via isomorphous substitution of aluminum for silicon, generate ion exchange sites in this mesoporous molecular sieve [21,22].…”

Preparation and characterization of magnetic iron oxide nanoparticles functionalized by l-cysteine: Adsorption and desorption behavior for rare earth metal ions

“…Due to the clear advantages of SPE technology, considerable efforts have been made to find new materials that can be used as a selective sorbents [5,[14][15][16][17][18][19][20][21]. Several types of nanomaterials, including magnetic iron oxide nanoparticles (Fe3O4 NPs) have unique advantages SPE adsorbents such as favorable chemical stability, low cost, easily retrieved from solution with a magnet.…”

Precious metal recovery by selective adsorption using biosorbents

“…Numerous works discuss the use of adsorption for precious metal separation and recovery [8][9][10][11][12][13][14][15][16][17]. Selective adsorption is an attractive technology for separation, removal and recovery of precious metals.…”