Arsenic(v) removal from aqueous solutions using ferromagnetic activated carbon: equilibrium and kinetic studies

2019 ◽  
Vol 32 (2) ◽  
pp. 179 ◽  
Author(s):  
Yacouba Sanou ◽  
Nguyen Thi Thanh Phuong ◽  
Samuel Pare ◽  
Nguyen Van Phuoc
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies

scholarly journals Studies on the Removal of Rhodamine B and Malachite Green from Aqueous Solutions by Activated Carbon

2008 ◽  
Vol 5 (4) ◽  
pp. 844-852 ◽  
Author(s):  
A. Edwin Vasu
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Malachite Green ◽  
Rhodamine B ◽  
Kinetic Studies ◽  
Solution Ph ◽  
Carbon Particles ◽  
Rate Determining Step ◽  
High Concentrations ◽  
Hoff Equation

Activated carbon prepared from tamarind fruit shells by direct carbonization was used for the removal of rhodamine B and malachite green dyes from aqueous solutions. Adsorption studies were performed by varying such parameters as dye concentration, pH of the dye solution, time and temperature. The equilibrium adsorption data obtained were used to calculate the Freundlich, Langmuir and Redlich-Peterson isotherm parameters. Increase in pH of the solution pH resulted in increased adsorption of both the dyes. Kinetic studies indicate that the pseudo-second order model can be used for describing the dynamics of the sorption processes. Film diffusion of the dyes was the rate determining step at low dye concentrations while diffusion of dyes through the pores the carbon particles determined the overall uptake at high concentrations. Thermodynamic parameters of the endothermic sorptions were evaluated using van’t Hoff equation. Desorption studies with acids were also performed in order to regenerate the used carbons.

scholarly journals Exploring Adsorption Process of Lead (II) and Chromium (VI) Ions from Aqueous Solutions on Acid Activated Carbon Prepared from Juniperus procera Leaves

Processes ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 217 ◽  
Author(s):  
Ismat H. Ali ◽  
Mohammed K. Al Mesfer ◽  
Mohammad I. Khan ◽  
Mohd Danish ◽  
Majed M. Alghamdi
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Solution Ph ◽  
Chromium Vi ◽  
Biosorption Process ◽  
Endothermic Process ◽  
Juniperus Procera

The adsorption potential of acid activated carbon prepared from leaves of Juniperus procera to remove Pb(II) and Cr(VI) toxic ions from aqueous solutions was investigated. The effects of solution pH, adsorbent mass, contact time, initial ion concentration and temperature on the biosorption process were studied, and the optimum conditions were determined. Moreover, Langmuir, Freundlich, Temkin and Dubinin–Radushkevich adsorption isotherm models were applied to analyze adsorption data. Thermodynamic parameters for the adsorption processes were calculated. Adsorption was found to be a spontaneous and endothermic process. In addition, kinetic studies revealed a pseudo-first order kinetics biosorption process. The obtained results suggest that acid activated Juniperus procera leaves powder can be used as a cheap, efficient and environmentally friendly adsorbent material with high removal efficiency up to 98% for Pb(II) and 96% for Cr(VI) at 0.80 and 1.00 g/100 mL, respectively. The duration of the process was 100 min and 120 min for Pb(II) and Cr(VI) ions, respectively. The morphology of the of prepared activated carbon was investigated by scanning electron microscope (SEM).

scholarly journals Characterisation and Kinetic Studies on Activated Carbon Derived from Rubber Seed Shell for the Removal of Methylene Blue in Aqueous Solutions

2019 ◽  
Vol 30 (2) ◽  
pp. 1-20 ◽  
Author(s):  
Nur Fatin Silmi Mohd Azani ◽  
◽  
Caryn Tan Hui Chuin ◽  
Nor Salmi Abdullah ◽  
Syazrin Syima Sharifuddin ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies ◽  
Rubber Seed

scholarly journals Removal of Methylene Blue from Aqueous Solution by Activated Carbon Prepared from Pea Shells (Pisum sativum)

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Ünal Geçgel ◽  
Gülce Özcan ◽  
Gizem Çağla Gürpınar
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies ◽  
Second Order ◽  
Order Kinetic ◽  
Adsorption Processes ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Langmuir And Freundlich Models

An activated carbon was prepared from pea shells and used for the removal of methylene blue (MB) from aqueous solutions. The influence of various factors such as adsorbent concentration, initial dye concentration, temperature, contact time, pH, and surfactant was studied. The experimental data were analyzed by the Langmuir and Freundlich models of adsorption. The adsorption isotherm was found to follow the Langmuir model. The monolayer sorption capacity of activated carbon prepared from pea shell for MB was found to be 246.91 mg g−1at 25∘C. Two simplified kinetic models including pseudo-first-order and pseudo-second-order equation were selected to follow the adsorption processes. Kinetic studies showed that the adsorption followed pseudo-second-order kinetic model. Various thermodynamic parameters such as , , and were evaluated. The results in this study indicated that activated carbon prepared from pea shell could be employed as an adsorbent for the removal of MB from aqueous solutions.

scholarly journals ACTIVATED CARBON FABRICATED FROM VIETNAMESE SUGARCANE BAGASSE FOR REMOVAL OF CIPROFLOXACIN FROM AQUEOUS SOLUTION: PREPARATION, CHARACTERIZATION AND KINETIC STUDIES

2020 ◽  
Vol 58 (5A) ◽  
pp. 170
Author(s):  
Bạch Long Giang ◽  
Lam Van Tan ◽  
To-Uyen T. Dao ◽  
Hong-Tham T Nguyen ◽  
Trinh Duy Nguyen
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Sugarcane Bagasse ◽  
Ph Value ◽  
Agricultural Waste ◽  
Analytical Techniques ◽  
Kinetic Studies ◽  
Kinetic Mechanism ◽  
High Porosity

Recent interest in wastewater treatment has shifted to the use of agricultural waste to treat antibiotics in aqueous solutions due the economic efficiency the technique brings. This study focuses on the synthesis, properties and study of the kinetic mechanism of activated carbon and its potential application to remove antibiotics from aqueous solutions. Activated carbon is synthesized from sugarcane bagasse by activated method with active substance of ZnCl2. With a specific surface area of about 980.84 m2/g and high porosity, the product could absorb a large amount of ciprofloxacin (CIP) antibiotics. The properties of materials are characterized by relevant analytical techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Brunauer-Emmett-Teller (BET). The behavior of CIP adsorption was studied under the effect of adsorption dose, initial CIP concentration and pH value. The adsorption and isothermal mechanisms are also studied. The results show that the adsorption adhered to the second kinetic model and the experimental data was found to be reasonably fitted to the Langmuir isotherm. Therefore, activated carbon manufactured from sugarcane bagasse could be used as a potential adsorbent to effectively remove antibiotics from aqueous solution.

scholarly journals Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

2017 ◽  
Vol 120 (2) ◽  
pp. 715-734 ◽  
Author(s):  
Marek Wojnicki ◽  
Robert P. Socha ◽  
Magdalena Luty-Błocho ◽  
Krzysztof Fitzner
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Kinetic Studies ◽  
Chloride Complex ◽  
Complex Ions
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