Abstract:Mo lé cu las de ben zi mi da zol co va len te men te li ga das à su per fí cie da si li ca gel, ≡SiL (onde L = N-propilbenzimidazol), ad sor vem Co(ClO 4 ) 2 de sol ven te não aquo so for man do com ple xos na su per fí cie se gun do a re a ção: m ≡SiL + Co(ClO 4)2 → ( ≡SiL) mCo(ClO 4)2. As cons tan tes de equi lí brio e ca pa ci da de de ad sor ção, fo ram de ter mi na das apli can do-se a equa ção de L ang mu ir for ne cen do res pec ti va men te, b = 3.0 x 10 3 L mol -1 e Ns = 0.098 x 10 -3 mol g -1. O me t… Show more
“…The experimental results are expressed by the sorption isotherms obeying the relation / . The maximum number of moles of adsorbed metal ions ( má x ), called the specific sorption capacity [34], is equal to the number of moles of metal ions adsorbed when the concentration ( ) of the metal tends to the saturation limit (1),…”
Section: Sorption Study Sorption In a Solution Containing Metalmentioning
The chloropropyl silica gel was modified with octa(3-aminopropyl)octasilsesquioxane and characterized by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR), spectroscopies, and surface and area porosity. The specific sorption capacity of metallic ions (Cu2+and Ni2+) increases in the following solvent order: water<ethanol 42%<ethanol<ketone. The high values of the constant (K) in the order of 103 L mol−1suggested the high adsorbent capacity of the modified silica (SGAPC) for Cu2+and Ni2+. SGAPC was applied to a separation column and shows recoveries of around 100% of copper in samples of sugar cane spirit, vodka, ginger brandy, and ethanol fuel.
“…The experimental results are expressed by the sorption isotherms obeying the relation / . The maximum number of moles of adsorbed metal ions ( má x ), called the specific sorption capacity [34], is equal to the number of moles of metal ions adsorbed when the concentration ( ) of the metal tends to the saturation limit (1),…”
Section: Sorption Study Sorption In a Solution Containing Metalmentioning
The chloropropyl silica gel was modified with octa(3-aminopropyl)octasilsesquioxane and characterized by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR), spectroscopies, and surface and area porosity. The specific sorption capacity of metallic ions (Cu2+and Ni2+) increases in the following solvent order: water<ethanol 42%<ethanol<ketone. The high values of the constant (K) in the order of 103 L mol−1suggested the high adsorbent capacity of the modified silica (SGAPC) for Cu2+and Ni2+. SGAPC was applied to a separation column and shows recoveries of around 100% of copper in samples of sugar cane spirit, vodka, ginger brandy, and ethanol fuel.
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