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Книга ISBN13 9783659232220 - Organic plant wastes as adsorbents used in water purification systems (Josiane Ponou and Toyohisa Fujita) в магазинах, библиотеках и электронных библиотеках с он-лайн чтением

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Название: Organic plant wastes as adsorbents used in water purification systems
Adsorption studies of Cr(VI) were conducted on 623 K or 723 K carbonized pineapple leaves as well as on dried ones. ThermoGravimetric/Differential Thermal Analysis (TG-DTA) of raw pineapple leaves revealed two main peaks indicating the change in structure of the material with increasing temperature. Some important parameters such as pH, contact time and solution temperature were evaluated. The results shown the high dependence on the parameters with Cr(VI) anions uptake. The removal rate of 90.1 % and the maximum adsorption capacity of 18.77 mg/g were obtained for 723 K carbonized pineapple leaves. Consistent with an endothermic reaction, the mechanism was found to be chemisorption and the system was well described by the pseudo-second order kinetic model. The intraparticle diffusion model, on the other hand, indicated that the system is governed by both film diffusion and intraparticule diffusion. Adsorption isotherm data were described by both Langmuir and Freundlich models. The...
Авторы: Josiane Ponou and Toyohisa Fujita
Издательство: LAP Lambert Academic Publishing
Год: 2012
Местонахождение: OZON.ru
ISBN: 9783659232220


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10 января 2015 года: Запуск базы ISBN10 и ISBN13

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