Kinetic modeling and isotherm study for naphthalene adsorption on boehmite nanopowder

Formation of closed mesopores in boehmite during the phase transformation of gibbsite under hydrothermal conditions

“…The samples were a mixture of test solutions (550 ll) with 50 ll of heavy water (D 2 O) added to stabilize the field along the deuterium resonance line. The absolute concentration of ''NMR-visible'' aluminum in the samples was estimated by a calibration curve (integral vs molar concentration) established from a set of standard Al(H 2 O) 6 Cl 3 solutions measured under the same experimental conditions. NMR spectra were acquired at room temperature.…”

“…().,-volV) (0123456789().,-volV) Boehmite (c-AlOOH) is an important mesoporous [1] material; due to the high specific surface, pore volume and presence of mesopores it is used as adsorbent [2], catalyst carrier [3], and intermediate phase in the production of alumina carriers, petrochemical and petroleum processing catalysts [4], membranes and filters [5], a component of toothpastes, enveloping and adsorbing agents in medicine. The parameters of the mesoporous system determine the adsorptive capacity of boehmite with respect to toxic organic and inorganic compounds in the wastewater treatment and in solving environmental problems [6].The dimensions of the crystals and the way they are packaged are very important for the functional materials obtained from boehmite; they affect its porous system, the temperatures of phase transitions into aluminum oxides. There are several types of boehmite: pseudoboehmite of the composition c-AlOOHÁnH 2 O (n = 0.3-1.0) with crystallite sizes of 2.5-3.5 nm (the specific surface area S p up to 450 m 2 /g and the pore volume V p up to 0.80 cm 3 /g) [7]; fine crystalline boehmite of the composition c-AlOOHÁnH 2 O (n = 0.0-0.2) with crystallite sizes of 11-13 nm (S p = 220-250 m 2 /g, V p = 0.58-0.60 cm 3 /g) [8,9]; well crystallized boehmite of the composition c-AlOOHÁnH 2 O (n = 0.0-0.2) with crystal sizes up to 80-140 nm (S p \ 150 m 2 /g, V p \ 0.15 cm 3 /g) [10].…”

“…().,-volV) (0123456789().,-volV) Boehmite (c-AlOOH) is an important mesoporous [1] material; due to the high specific surface, pore volume and presence of mesopores it is used as adsorbent [2], catalyst carrier [3], and intermediate phase in the production of alumina carriers, petrochemical and petroleum processing catalysts [4], membranes and filters [5], a component of toothpastes, enveloping and adsorbing agents in medicine. The parameters of the mesoporous system determine the adsorptive capacity of boehmite with respect to toxic organic and inorganic compounds in the wastewater treatment and in solving environmental problems [6].…”

Clay Adsorption Perspective on Petroleum Refining Industry

“…Waste oil is considered a valuable and an important resource of energy [14,55,56]. Waste oil is recovered using several techniques including chemical technique (acid/clay) [14], physical technique such as distillation [56], thin film evaporation [57] and solvent extraction [58].…”

Treatment of Waste Lubricating Oil by Chemical and Adsorption Process Using Butanol and Kaolin

“…Lubricating oil wastes processing is widely used, among others, by using a combination of solvent extraction and adsorption methods [3] using the addition of sulfuric acid, phosphoric acid, acetic acid and acids [4], using treatment of solvent/clay extraction [5]. Some of the processing that has been done, among others, used oil processing using various absorbent [6], and used oil recycling processes with new washing agents such as acetic acid belonging to Hamawand et al [7].…”