The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Pillared clay was synthesized from a natural Tunisian Bentonite from El Hamma deposit (Province of Gabès in South of Tunisia) according to common method: grinding, sieving, Na exchange, pillaring, drying and calcination (450 °C, 2h). Adsorption of methylene blue (MB) on the prepared Al-pillared clay by microwave (360 W, 7 min) was studied in batch experiments. Equilibrium data are analyzed by Freundlich...
The adsorption of thiophene from thiophene-octane mixture has been investigated using organic-montmorillonite under proper conditions. The adsorbents were prepared by a xerogel process, followed by thermo - treatment. The adsorptive experiments show that C-P-MMT adsorbent has the higher capacity, 3.8mg/g (mg of sulfur per g of adsorbent). BET, XRD, NMR were used to characterize the adsorbents. It...
Soil samples in different depths we recollected from Tiebutie pool in Daqing, which was used to take up waste water from a petrochemical plant for about 30 years. The distribution and concentration of polycyclic aromatic hydrocarbons(PAHs) in organo-mineral aggregates were analyzed. Results show that the concentration of low molecular PAHs is the highest in all fractions, and the concentration of...
When evaluating small-animal imagers, small pointlike sources (<;1mm diam.) are useful for testing system performance. Slightly larger sources (1-3 mm) can also be used to mimic tumors. Ideal sources should have high uptake of TcO4-, and should not be damaged during preparation or handling. Various crystalline minerals are able to adsorb a variety of chemical species, and may satisfy these criteria...
Aimed at the current situation of nitrogen pollution in groundwater, adsorption characteristics of ammonia-nitrogen onto different lithology named silty sand, silty clay and clay were studied. The results indicated that the process of ammonia-nitrogen adsorption onto soils mainly occurred within 0~2 h, then attended to a dynamic equilibrium. Two kinetic models can describe the experiment data and...
Clay minerals have been implicated as a probable active surface for pre-biological chemical reactions occurring during the early evolution of the Earth. In this context, it is very important to explain the role of these surfaces and how much a solid is involved in the chemical transformation that is taking place at its surface. The aim of this work is to present experimental results from the ultraviolet...
Al-pillared montmorillonites (Al-MMT) were synthesized from natural occurring sodium montmorillonite through the exchange of inter-lamellar ions with hydroxyalumina polycations. Furthermore, the morphology, composite structure and pore properties of such composite materials were investigated by Powder X-ray Diffraction (XRD), Fourier Transformation Infra-red Spectra (FTIR) and Nitrogen Adsorption-Desorption...
The copper heavy metal wastewater does lots of harm to people and it is difficult to deal. Using flocculant to treat copper wastewater has a lot of advantages. Under certain conditions proceeded modification of a kind of clay which has the unique characteristic of absorbability. Then the modification clay and the polymerization iron carbonyl ion can play polyreaction, to innovate a new type of macromolecule...
Cadmium adsorption features by montmorillonite and illite in alkaline conditions and the influence of inorganic salts were studied by experiment. The cadmium adsorption equilibrium time was 6 hours when the pH values in initiative solutions were 9, and the adsorption cadmium capacity by montmorillonite and illite was 6.910 mg.g-1 and 6.642 mg.g-1. When there are inorganic salts in the solutions of...
This test studied the behaviors of adsorbing uranium of attapulgite. Meanwhile the exchange column filled with attapulgite was used to treat the wastewater containing uranium in laboratory. The percentage of removal of U was above 99.95% and the residual concentration of uranium was below the state specified discharge standard (0.05 mg/l). The uranium adsorbed in column could be desorbed by 5% HCl...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.