Katolicheskai︠a︡ Liga i kalʹvinisty vo Frant︠s︡īi; opyt istorīi demokraticheskago dvizhenīi︠a︡ vo Frant︠s︡īi vo vtoroĭ polovinie 16 vi︠e︡ka (po neizdannym istochnikam)

Vol. 1., "Iz 'Universitetskikh izvi︠e︡stīĭ' 1876 g."

Carta pastoral que el Excmo. é Ilmo. Sr. Obispo de Córdoba dirige al clero y demás fieles de su diócesis : al publicar la indulgencia plenaria en forma de jubileo concedida por N. Smo. Padre Pío Papa IX en 1850.

Mode of access: Internet.

Hadrianus VI sive Analecta historica de Hadriano Sexto Trajectino, papa romano /

Mode of access: Internet.

Lekt︠s︡ïi po drevnĭ russkoĭ istorïi do kontsa XVI vi︠e︡ka.

"Chitanyia v [Moskovskom] universiteti︠e︡ i na Vysshikh zhenskikh kursakh v Moskvi︠e︡."--2d prelim. leaf.

Naselenie Rossii po piatoĭ revizii : Podushnai͡a podat v XVIII vi͡eki͡e i statistika naselenii͡a v kontsi͡e XVIII vi͡eka. [The population of Russia according to the fifth census. Poll tax in the 18th century and statistics of population distribution in the 18th century] ...

At head of title: V. E. Den.

Polnoe sobranie ri͡e︡cheĭ Imperatora Nikolai͡a︡ II., 1894-1906 : sostavleno po off. dannym "Pravitelʹstvennago Vi͡e︡stnika".

Mode of access: Internet.

Ocherki po istorīi russkoĭ literatury i prosvi͡e︡shchenīi͡a︡ s nachala XIX [i.e. devi͡a︡tnadt͡s︡atogo] vi͡e︡ka /

Preservation photocopy on alkaline paper.

Borʹba za vi͡eru : istoriko-bytovye ocherki i obzor zakonodatelʹstva po staroobri͡adchestvu i sektantstvu v ego posli͡edovatelʹnom razvitīi s prilozhenīem stateĭ zakona i vysochaĭshikh ukazov /

Includes bibliographical references.

Retention of toxic chromium from aqueous phase by H3PO4-activated lignin: Effect of salts and desorption studies

In this study, the feasibility of using H₃PO₄-activated lignin for hexavalent chromium adsorption has been investigated. The composite of activated lignin was characterized using FTIR, XRD and SEM with EDAX analysis. It was observed that the pH had a strong effect on the adsorption capacity; adsorption of Cr(VI) was more favorable at acidic pH with maximum uptake at pH 2. The adsorption equilibrium data were best represented by Koble-Corrigan isotherm. The monolayer sorption capacity obtained from the Langmuir model was found to be 77.85 mg/g. Adsorption showed pseudo-second order rate kinetics and the process involving the rate-controlling step is complex as it involves both film and intraparticle diffusion processes. The NaOH desorbing agent was able to release approximately 84% of metal ions. Thermodynamic parameters showed that the sorption process is exothermic and non-spontaneous. The overall Cr(VI) retention on the activated lignin surface perhaps includes both the physical adsorption of Cr(VI) and the consequent reduction of Cr(VI) to Cr(III). (C) 2011 Elsevier B.V. All rights reserved.

Modelling and fixed bed column adsorption of Cr(VI) onto orthophosphoric acid-activated lignin

The advantage of using an available and abundant residual biomass, such as lignin, as a raw material for activated carbons is that it provides additional economical interest to the technical studies. In the current investigation, a more complete understanding of adsorption of Cr(VI) from aqueous systems onto H PO -acid activated lignin has been achieved via microcolumns, which were operated under various process conditions. The practice of using microcolumn is appropriate for defining the adsorption parameters and for screening a large number of potential adsorbents. The effects of solution pH (2-8), initial metal ion concentration (0.483-1.981 mmol·L ), flow rate (1.0-3.1 cm ·min ), ionic strength (0.01-0.30 mmol·L ) and adsorbent mass (0.11-0.465 g) on Cr(VI) adsorption were studied by assessing the microcolumn breakthrough curve. The microcolumn data were fitted by the Thomas model, the modified Dose model and the BDST model. As expected, the adsorption capacity increased with initial Cr(VI) concentration. High linear flow rates, pH values and ionic strength led to early breakthrough of Cr(VI). The model constants obtained in this study can be used for the design of pilot scale adsorption process. © 2012 Chemical Industry and Engineering Society of China (CIESC) and Chemical Industry Press (CIP).

Recueil des actes du Comité de salut public. Recueil des actes du Comité de salut public, avec la correspondance officielle des représentants en mission et le registre du Conseil exécutif provisoire. Table alphabétique. Table alphabétique des tomes VI à XVII / publié par F.-A. Aulard,...

Collection : Collection de documents inédits sur l'histoire de France