Colloids for Nano- and Biotechnology by André Ayral (auth.), Zoltán D. Hórvölgyi, Éva Kiss (eds.)

By André Ayral (auth.), Zoltán D. Hórvölgyi, Éva Kiss (eds.)

This quantity includes a collection of the papers provided on the ninth convention on Colloid Chemistry. A colloid chemical method of nano- and biotechnology used to be one of many major themes of the assembly held in Siófok, Hungary in October 2007. It was once geared up via the Hungarian Chemical Society in cooperation with best Hungarian universities and the Hungarian Academy of Sciences.

The contributions proven the development of the sector and supported that "The global of ignored dimensions" shouldn't be ignored in any respect in smooth fabric sciences and applied sciences. This quantity is meant for execs facing basic study or improvement of business purposes, who stumble upon colloids, nanostructures, and interfacial phenomena in the course of their paintings.

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After decreasing the surfactant concentration below the limit of foaming in a closed photoreactor utilizing H2 O2 as electron acceptor, total mineralization of the pollutant could be achieved by a longer-time irradiation in a second, air-bubbled reactor. The activity Introduction A significant part of the man-made pollutants getting into our natural environment is toxic and/or biologically nondegradable. Some of these materials upset the balance of the biosphere in the soils and natural waters, or spoil the resources of drinking water [1].

The range of 20–50 ◦ C was chosen, taking the economic technological possibilities (low-cost cooling or heating) into consideration. As it could be expected, increasing the temperature, the conversion rate was enhanced (Fig. 10). At 50 ◦ C, within a 5-h irradiation time, total conversion of the surfactant took place, while at 20 ◦ C not even an 8-h period of experiment was enough. Of course, the progress of mineralization (the decrease of TOC) is much slower than the conversion of the surfactant, but the tendency regarding the temperature effect is the same (Fig.

The latter is not likely to form for simply geometric reason. It was assumed in a recent paper [14] that citric acid may be adsorbed on the surface of magnetite nanoparticles by coordinating ≡FeOH sites via one or two of the carboxylate functionalities depending on the steric necessity and the curvature of the surface. Citric acid (CA) is one of the widely accepted stabilizing agent in water based magnetic fluids. CA can prevent the aggregation of magnetic particles effectively owning to the steric and electrostatic repulsive barrier of the ionized layer of citrate coating on magnetite or maghemite [14–19].

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