[PDF] Top 20 La Fotografía documental contemporánea en Brasil

... them. Adsorption was rapid at first, but then gradual, possibly due to the presence of active unoccupied sites at the early stages of adsorption, the number of which declined with the passage of time; it ... See full document

... phase. Adsorption is an important phenomenon in many physical, chemical, and biological processes in the ...nature. Adsorption is also widely used in water and wastewater treatment ...is activated ... See full document

... 4-CP from aqueous solutions using activated carbon from Aloe vera green ...the adsorption experiments were carried out at room temperature (25 ˚C) and shaken (200 rpm) ... See full document

... purchased from the Merck Company, ...The produced carbon was weighed for determining the humidity percentage and the amount of obtained adsorbent, and kept into the sealed container of desiccator in ... See full document

... health from the potential toxic effects caused by exposure to phenol ...In Iran, a maximum phenol level of ...of Iran (13). There are various methods for removing phenol from aquatic ... See full document

... of activated carbon was explored in this ...fluoride from the water supply may thus be an environmentally friendly and practical waste con- version method (Fito et ...the activated ... See full document

... the adsorption increased very fast and almost linearly by PAC with the increase of the contact time almost in the first 10 min and 20 min in respect to Cu(II) and Pb(II) ...reached adsorption equilibrium in ... See full document

... and adsorption of the chemical dyes has been found to be the most ...available activated carbon as an adsorbent has yielded excellent results (Walker and Weatherly, ...slurry from fertilizer ... See full document

... of adsorption reactions, data on adsorption kinetics were ...cerium adsorption increases with increasing time and reaches equilibrium during 300 minutes (Figure ...cerium adsorption depends on ... See full document

... 95% confidence level and seven degrees of freedom, Bonferroni limit was 11.7687 and t-value limit was 4.30265 for MB and BG adsorption. The minimum statistically significant effect magnitude for 95% confidence ... See full document

... wood activated carbon (CC) does not exceed ...camphor activated carbon (TCC) achieves nearly 80% beneath pH= ...privileged adsorption of p-nitroaniline in weak acidic ... See full document

... Most of the heavy metals are carcinogenic, a problem assumed to be related to their electronic structure. Even the metals considered to be essential for all forms of life may become problematic when in excess[2]. Heavy ... See full document

... ABSTRACT: Activated carbon was developed from coconut shell, characterized and used for the removal of Rhodamine-B from wastewater ...prepared carbon were found to be 80 mg g -1 , 600 ... See full document

... constraints. Adsorption is an effective and that versatile method for removing chromium particularly when combined with appropriate regeneration ...of activated carbons are commercially available but very ... See full document

... waters from these industries into river water make the water inhibitory to aquatic life and causing visible ...dyes from waste streams before discharge to public water sources is of primary concern ... See full document

... Several methods have been published in the litterature to describe experimental data of adsorption isotherms. The Langmuir and Freundlich models are the most frequently employed models. In this work, both models ... See full document

... an activated carbon derived from date pits and stems (DPSAC) was prepared by physical activation under N 2 and used as a support of cobalt transition metals, by wetness impregnation at different Co ... See full document

... collected from the Palm groves in Zahedan sity, Iran, was used for the ...removed from PB biomass surface by repeated washing with boiling ...nitrogen adsorption instrument in an ASAP 2020 ... See full document

... but due to its toxic property it is restricted to use as a color additive in foods and beverages. Rhodamine- B is widely used in various industries for coloring as well as other purposes. Due to the concern for ... See full document

... monolayer adsorption onto a surface containing a finite number of adsorption sites of uniform strategies of adsorption with no transmigration of adsorbate in the plane of surface while ... See full document