Investigation of Diclofenac Sodium Adsorption by a Purified Algerian Diatomite Using Hydrochloric Acid

2020 ◽  
Vol 20 (7) ◽  
pp. 4540-4548
Author(s):  
Wafia Ghabeche ◽  
Skander Boukhezar ◽  
Kamel Chaoui ◽  
Sihem Benayache ◽  
Hazem Meradi
Keyword(s):  
Hydrochloric Acid ◽  
Chemical Treatment ◽  
Acid Treatment ◽  
Diclofenac Sodium ◽  
Order Rate Constant ◽  
Second Order ◽  
Order Model ◽  
Equilibrium Level ◽  
Hydrochloric Acid Treatment ◽  
Pseudo Second Order

The objective of this investigation is to use hydrochloric acid (HCl) at different concentration as a chemical treatment for the Algerian diatomite (DE) in order to get it ready for further applications oriented towards pharmaceutical aspects. Commercial diclofenac sodium (DS) is used to study adsorption on DE in aqueous laboratory conditions. It is found that DE contains roughly 60% SiO2 and 13% CaO. Its morphology is characterized by a porous structure composed of several broken and compacted diatomic aggregates, containing cylindrical and alveolus forms of varying diameters, girdle bands and other clayey compounds. The hydrochloric acid treatment is proven to be one attractive choice as it entails a significant raise of SiO2 and facilitates reducing most of impurities. After 10% HCl (DE-10) treatment of crude DE, the amount of SiO2 increased by over 64%. The result showing DS adsorption as a function of time is optimal for DE-10 as the quantity of the absorbed DS on treated DE (qt) reached 60 mg/g and maintained this equilibrium level from 90 up to 120 min. The pseudo second order model has been successfully applied. The quantity of the absorbed DS on treated DE at equilibrium (qe) and the pseudo second order rate constant (k2) for the case DE-10 are found 114.94 mg/g and 1.3 10−4 g mg−1 min−1 respectively.

scholarly journals Kinetic Modeling and Effect of Process Parameters on Selenium Removal Using Strong Acid Resin

2016 ◽  
Vol 6 (4) ◽  
pp. 1045-1049
Author(s):  
N. Rajamohan ◽  
R. Rajesh Kannan ◽  
M. Rajasimman
Keyword(s):  
Ion Exchange ◽  
Removal Efficiency ◽  
Exchange Process ◽  
Selenium Concentration ◽  
Strong Acid ◽  
Order Rate Constant ◽  
Second Order ◽  
Order Model ◽  
Selenium Removal ◽  
Pseudo Second Order

Heavy metal pollution due to the contamination of Selenium above the tolerable limit in the natural environment is a challenging issue that environmental scientists face. This study is aimed at identifying ion exchange technology as a feasible solution to remove selenium ions using 001x7 resin. Parametric experiments were conducted to identify the optimal pH, sorbent dose and speed of agitation. Selenium removal efficiency of 85% was attained at pH 5.0 with 100 mg/L selenium concentration. The increase in resin dose was found to increase removal efficiency. However, metal uptake decreased. The experiments on the effect of concentration proved the negative effect of higher concentrations of selenium on removal efficiency. The ion exchange process was proved to be optimal at an agitation speed of 200 rpm and a temperature of 35 °C. Pseudo second order model was found to fit the kinetic data very well compared to the pseudo-first order model and the pseudo second order rate constant was estimated as 8.725x10-5 g mg-1 min-1 with a solution containing 100 mg/L selenium.

scholarly journals Hydrochloric acid treatment of the well

2020 ◽  
Vol 3 (7) ◽  
pp. 58-59
Author(s):  
Shukurov Abror Sharipovich
Keyword(s):  
Hydrochloric Acid ◽  
Chemical Treatment ◽  
Acid Treatment ◽  
Hydrochloric Acid Treatment

This article is about salt chemical treatment and hot acid treatment of wells

scholarly journals Hydrochloric acid treatment of the well

2020 ◽  
Vol 3 (9) ◽  
pp. 77-79
Author(s):  
Shukurov Abror Sharipovich
Keyword(s):  
Hydrochloric Acid ◽  
Chemical Treatment ◽  
Acid Treatment ◽  
Case Research ◽  
Hydrochloric Acid Treatment

This article is about salt chemical treatment and hot acid treatment of wells. In this case, research has covered different points of theoretical and methodological the hydrochloric acid treatment of the well. Finally, research has pinpointed on various views of outcomes and shortcomings at all.

Adsorption Kinetics of Pb2+ Ions Using Chitosan Nanoparticles

2013 ◽  
Vol 367 ◽  
pp. 45-49
Author(s):  
Ying Hong ◽  
Ze Hui Zhong ◽  
You Shi Liu
Keyword(s):  
Adsorption Kinetics ◽  
Chitosan Nanoparticles ◽  
Second Order ◽  
Isotherm Model ◽  
Order Model ◽  
Adsorption Characteristics ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Second Order Model

Chitosan nanoparticles were prepared by crosslinkingusing TPP. SEM showed that chitosan nanoparticles were successfully obtained.The adsorption characteristics of chitosan nanoparticles were evaluated. Theresults demonstrated that chitosan nanoparticles were suitable for adsorbent toremoval Pb2+. The parameters for the adsorption of Pb2+by chitosan nanoparticles were also determined. It was shown that chitosannanoparticles were fit for Langmuir’s isotherm model and that the adsorptionkinetics of Pb2+ described by the pseudo-second-order model could bebest.

Polyaniline/ZnO nanocomposites for the removal of methyl orange dye from waste water

2018 ◽  
Vol 32 (19) ◽  
pp. 1840085 ◽  
Author(s):  
Neha V. Nerkar ◽  
Subhash B. Kondawar ◽  
Snehal Kargirwar Brahme ◽  
Yun Hae Kim
Keyword(s):  
Waste Water ◽  
Methyl Orange ◽  
Adsorption Mechanism ◽  
Second Order ◽  
Pure Pani ◽  
Time Interval ◽  
Order Model ◽  
Vis Spectroscopy ◽  
Pseudo Second Order ◽  
Second Order Model

In this paper, we report the safe removal of methyl orange (MO) dye from aqueous solution using chemical interaction of dye molecule with polyaniline/zinc oxide (PANI/ZnO) nanocomposite. PANI/ZnO nanocomposite has been prepared by in situ polymerization. PANI/ZnO nanocomposite was found to be the best promising candidate for adsorption of dyes due to more porosities compared to that of pure PANI. In the present investigation, PANI/ZnO nanocomposite was mixed in a solution of MO dye and used for adsorption process. Color removal was studied using UV-Vis spectroscopy and the spectra were recorded for specific time interval and validation of kinetic model has been applied. Absorbance of PANI/ZnO nanocomposite was found to be increased as compared to that of pure ZnO nanoparticles and pure PANI due to synergistic effect. Comparatively, the removal of dye was also found to be more by using PANI/ZnO nanocomposites. In order to evaluate kinetic mechanism the pseudo-first-order model, pseudo-second-order model and intraparticle diffusion models were verified by the linear equation analysis. Adsorption mechanism of pseudo-second-order model was systematically explained for removal of dye using PANI/ZnO nanocomposite. The results clearly demonstrated that the adsorption mechanism gives very novel and green method of removal of hazardous dyes from waste water.

scholarly journals Kinetics of scandium recovery by TVEX-TBP from the solution formed after the salt chlorinator cake leaching

2020 ◽  
Vol 168 ◽  
pp. 00050
Author(s):  
Vadym Korovin ◽  
Yurii Pohorielov ◽  
Yurii Shestak ◽  
Oleksandr Valiaiev ◽  
Jose Luis Cortina
Keyword(s):  
Chemical Interaction ◽  
Extraction Process ◽  
Second Order ◽  
Order Kinetic ◽  
Order Model ◽  
Elovich Equation ◽  
Diffusion Phase ◽  
Leaching Solution ◽  
Pseudo Second Order ◽  
Kinetics Of

Kinetics of scandium recovery by TVEX containing tributyl phosphate was studied from the clarified leaching solution of salt chlorinator cake. To assess the contribution of each diffusion phase, experimental data were analyzed using a graphic method. To define the contribution of chemical interaction into the scandium extraction process, recovery kinetics was quantitatively described using pseudo-first order, pseudo-second order kinetic models and Elovich equation in linearized form. It was established that recovery kinetics was most accurately described with the pseudo-second-order model.

Nanoclay-Supported Zero-Valent Iron as an Efficient Adsorbent Material for Arsenic

2013 ◽  
Vol 686 ◽  
pp. 296-304 ◽  
Author(s):  
Michael Leo Dela Cruz ◽  
Khryslyn Araño ◽  
Eden May Dela Pena ◽  
Leslie Joy L. Diaz
Keyword(s):  
Inductively Coupled Plasma ◽  
Order Rate Constant ◽  
Interplanar Distance ◽  
Second Order ◽  
Zero Valent Iron ◽  
Particle Model ◽  
Aqueous Environment ◽  
Arsenic Adsorption ◽  
Elovich Equation ◽  
Pseudo Second Order

The release of arsenic to aqueous environment imposes threats to human health. Montmorillonite supported zero-valent iron (ZVI-MMT) is a material with capability of immobilizing arsenic from aqueous environment. The arsenic adsorption efficiency of ZVI-MMT was obtained. In addition, adsorption kinetics of arsenic contaminated water on the material was determined. Arsenic and iron content was quantified by an inductively coupled plasma mass spectrometer (ICP-MS), interplanar distance of the adsorbent was measured by x-ray diffractometer (XRD), and the morphology of the adsorbent was obtained from a transmission electron microscope (TEM). Isotherm data were analyzed using the Langmuir and Freundlich isotherms. The data fitted well to Langmuir isotherm with derived adsorption capacity of 20.1 mg/g. Kinetics data were analyzed using intra-particle model, Elovich equation, pseudo first-, and pseudo second-order models. Elovich equation and pseudo second-order equation fitted the experimental data with pseudo second-order rate constant of 61.2 x 10-4 g/mg-min.

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