scholarly journals Sorption Kinetic Studies of Medical Grade Activated Carbon Prepared from Papaya Seeds

2008 ◽  
Vol 2 (6) ◽  
Author(s):  
J.G. Collin ◽  
Mei P. Lee
Keyword(s):  
Activated Carbon ◽  
Kinetic Studies ◽  
Sorption Kinetic ◽  
Papaya Seeds ◽  
Medical Grade

Sorption kinetic studies of water vapour on activated carbon beds

Carbon ◽  
2008 ◽  
Vol 46 (3) ◽  
pp. 397-404 ◽  
Author(s):  
Shankar Narayan ◽  
Brian Harrison ◽  
Septimus Liang ◽  
Michael Evans ◽  
Lisa Croll ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Water Vapour ◽  
Kinetic Studies ◽  
Sorption Kinetic

scholarly journals Adsorption of Nitrate onto ZnCl2-Modified Coconut Granular Activated Carbon: Kinetics, Characteristics, and Adsorption Dynamics

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Lingjie Liu ◽  
Min Ji ◽  
Fen Wang
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Kinetic Studies ◽  
Surface Characteristics ◽  
Electrostatic Attraction ◽  
Batch Adsorption ◽  
Dynamic Adsorption ◽  
Batch Experiments ◽  
Nitrate Adsorption ◽  
Pseudo Second Order

Coconut granular activated carbon (CGAC) was modified by impregnating with ZnCl2solution to remove nitrate from aqueous solutions. Sorption isotherm and kinetic studies were carried out in a series of batch experiments. Nitrate adsorption of both ZnCl2-modified CGAC and CGAC fitted the Langmuir and Freundlich models. Batch adsorption isotherms indicated that the maximum adsorption capacities of ZnCl2-modified CGAC and CGAC were calculated as 14.01 mgN·g−1and 0.28 mgN·g−1, respectively. The kinetic data obtained from batch experiments were well described by pseudo-second-order model. The column study was used to analyze the dynamic adsorption process. The highest bed adsorption capacity of 1.76 mgN·g−1was obtained by 50 mgN·L−1inlet nitrate concentration, 20 g adsorbents, and 10 ml·min−1flow rate. The dynamic adsorption data were fitted well to the Thomas and Yoon–Nelson models with coefficients of correlationR2 > 0.834 at different conditions. Surface characteristics and pore structures of CGAC and ZnCl2-modified CGAC were performed by SEM and EDAX and BET and indicated that ZnCl2had adhered to the surface of GAC after modified. Zeta potential, Raman spectra, and FTIR suggested the electrostatic attraction between the nitrate ions and positive charge. The results revealed that the mechanism of adsorption nitrate mainly depended on electrostatic attraction almost without any chemical interactions.

scholarly journals Possibility of Removing Phosphates from Activated Charbon Made from Date Kernels

2021 ◽  
Vol 06 (03) ◽  
Author(s):  
Nora Seghairi ◽  
Keyword(s):  
Activated Carbon ◽  
Natural Waters ◽  
Activated Carbons ◽  
Kinetic Studies ◽  
Phosphate Adsorption ◽  
Initial Concentration ◽  
Adsorbent Dosage ◽  
Isotherm Study ◽  
Freundlich Isotherms ◽  
Batch Tests

Phosphates in natural waters and whatever their origin, promote the formation of algae, reduce dissolved oxygen and reduce biodiversity in aquatic ecosystems. At high doses, phosphate salts can cause health problems. The objective of our study was to develop a simple, efficient and environmentally friendly sorption depollution technique on available and inexpensive media. We have studied the adsorption of phosphate on activated carbons prepared from date kernels. Batch tests were carried out in order to study different operating parameters such as the effect of contact time, pH, initial phosphate concentration and adsorbent dosage and adsorption kinetic. The sorption equilibrium was analyzed by Langmuir, Freundlich isotherms model. Results show that the phosphate adsorption was reversible and the quantity adsorbed reached its maximum value (14.49 mg/g) after 40 minutes. It was also found that phosphate uptake was affected by variation of pH, initial concentration of phosphate and activated carbon dosage. The adsorption improved with an acidic pH (pH = 6), initial concentration and adsorbent dosage. The results of kinetic studies revealed that adsorption phosphate on activated carbon based on date kernels (Biocar) and the intra-particle diffusion involved in the adsorption mechanism. Also, isotherm study showed that Langmuir isotherm best fit the data and the adsorption was a physical type.

Preparation of activated carbon/chitosan/Carica papaya seeds composite for efficient adsorption of cationic dye from aqueous solution

2020 ◽  
Vol 21 ◽  
pp. 100741 ◽  
Author(s):  
Esta A. Idohou ◽  
Jacques K. Fatombi ◽  
Sèmiyou A. Osseni ◽  
Ignace Agani ◽  
David Neumeyer ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Carica Papaya ◽  
Cationic Dye ◽  
Papaya Seeds

Isotherm and kinetic studies of adsorption of methylene blue using activated carbon from ackee apple pods

2021 ◽  
Vol 31 ◽  
pp. 100607
Author(s):  
Mojeed O. Bello ◽  
Nasiru Abdus-Salam ◽  
Folahan A. Adekola ◽  
Ujjwal Pal
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Kinetic Studies

Removal of Methylene Blue Dye from Textile Wastewater Using Water Hyacinth Activated Carbon as Adsorbent: Synthesis, Characterization and Kinetic Studies

2019 ◽  
Author(s):  
Getasew Nibret ◽  
Shadab Ahmad ◽  
Dubasi Govardhana Rao ◽  
Imran Ahmad ◽  
Mohamed Ashfaq Mohamed Usman Shaikh ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Water Hyacinth ◽  
Kinetic Studies ◽  
Textile Wastewater ◽  
Blue Dye ◽  
Methylene Blue Dye
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