scholarly journals Application of Thomas Model to Determine the Capacity of Bintaro Fruit Shell Adsorbent

2020 ◽  
Keyword(s):  
Thomas Model

scholarly journals ADSORPTION OF FLUORIDE FROM INDUSTRIAL WASTEWATER IN FIXED BED COLUMN USING JAVA PLUM (SYZYGIUM CUMINI)

2016 ◽  
Vol 9 (9) ◽  
pp. 320 ◽  
Author(s):  
Tej Pratap Singh ◽  
Sanjay Ghosh ◽  
Majumder Cb
Keyword(s):  
Residence Time ◽  
Industrial Wastewater ◽  
Fluoride Concentration ◽  
Fixed Bed ◽  
Experimental Results ◽  
Fixed Bed Reactor ◽  
Thomas Model ◽  
Fixed Bed Column ◽  
Empty Bed Residence Time

ABSTRACTObjective: The quality of drinking water is important for public safety and quality of life. Thus, providing every person on earth safe drinking waterseems to be the biggest challenge in front of mankind. For this purpose, here we have investigated the fluoride removal capacity of java plum.Methods: In this study, removal of fluoride from industrial wastewater using fixed-bed reactor adsorption techniques by java plum seed (Syzygiumcumini) was investigated. Fixed-bed column experiments were carried out for different bed depths, influent fluoride concentrations, and various flowrates. The Thomas model and bed depth service time model were applied to the experimental results. Both model predictions verify the experimentaldata for all the process parameters studied, indicating that the models were suitable for java plum (S. cumini) seeds (Biosorbent) fix-bed columndesign.Results: The empty bed residence time (EBRT) model optimizes the EBRT, and the Thomas model showed that the adsorption capacity is stronglydependent on the flow rate, initial fluoride concentration, and bed depth and is greater under conditions of a lower concentration of fluoride, lowerflow rate, and higher bed depth.Conclusion: The experimental results were encouraging and indicate that java plum (S. cumini) seed is a feasible option to use as a biosorbent toremove fluoride in a fixed bed adsorption process.Keywords: Adsorption, Column experiment, Thomas model, Empty bed residence time, Java plum.

scholarly journals Cu adsorption in fixed bed column with three different influent concentration

2019 ◽  
Vol 120 ◽  
pp. 03003
Author(s):  
Huang-Mu Lo ◽  
Kae-Long Lin ◽  
Min-Hsin Liu ◽  
Hsung-Ying Chiu ◽  
Fang-Cheng Lo
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Activated Carbon ◽  
Fixed Bed ◽  
Thomas Model ◽  
Fixed Bed Column ◽  
Nelson Model ◽  
Influent Concentration ◽  
Carbon Adsorption ◽  
Metals Removal

Heavy metals from the electroplating wastewater might cause environmental pollution if not well treated. Generally, carbon adsorption might be used for the final step for further trace metals removal. This study investigated the heavy metal Cu adsorption in the fixed bed column with 1, 10 and 100 mg/L influent concentration. Results showed that KAB decreased as influent Cu concentration increased from 1 to 100 mg/L while N0 increased as influent concentration increased from 1 to 100 mg/L as can be found in Adams-Bohart model. R2 was found between 0.8579 and 0.9182. In Thomas model. KTH and q0 showed the similar trend as KAB and N0 in the Adams-Bohart model. KTH decreased as influent Cu concentration increased from 1 to 100 mg/L. q0 increased as influent Cu concentration increased from 1 to 100 mg/L. R2 of regression model was found between 0.9065 and 0.9836. In Yoon-Nelson model. KYN increased as influent Cu concentration increased from 1 to 100 mg/L while τ decreased as influent Cu concentration increased from 1 to 100 mg/L. Results showed that the three models of Adams-Bohart model, Thmoas model and The Yoon-Nelson model were suitable for the description of Cu adsorption by activated carbon.

scholarly journals Synthesis and application of CeO2/sawdust nanocomposite for removal of As (III) ions from aqueous solutions using a fixed bed column system

2016 ◽  
Vol 19 (1) ◽  
pp. 7-16 ◽  
Keyword(s):  
Aqueous Solutions ◽  
Flow Rate ◽  
Fixed Bed ◽  
Cost Effective ◽  
Sorption Process ◽  
Breakthrough Curves ◽  
Precipitation Method ◽  
Thomas Model ◽  
Influent Concentration ◽  
Column System

<p>In this study, nanocomposite of ceria sawdust (CeO<sub>2</sub>/SD) synthesized by precipitation method was utilized for removal of As (III) ions from aqueous solutions. Study of the process was done in column system. Characterization of the nano sized adsorbent particles was carried out using XRD and SEM techniques. The effects of important parameters, such as the value of initial pH, the flow rate, the influent concentration of arsenic and bed depth were studied in the column system. The Thomas model was applied for treatment of the adsorption data at different flow rate, influent concentration and bed depth. The bed-depth/service time analysis (BDST) model was also applied at different bed depth to predict the breakthrough curves. The two models were found suitable for describing the bio sorption process of the dynamic behavior of the CeO<sub>2</sub>/SD adsorbent in column investigation. Based on Thomas model, the equilibrium adsorption reached 8.28 mg g<sup>−</sup><sup>1</sup> when a As(III) polluted solution with influent concentration of As 10 mg l<sup>-1 </sup>passed through the column with a flow rate of 2 ml min<sup>−</sup><sup>1</sup>. All the results suggested the presented nanocomposite as an efficient and cost effective adsorbent for removal of As (III) ions from aqueous solutions.</p>

Technical basis for managing water supply in critical basins: new alternatives applied to the Colombian case

2005 ◽  
Vol 5 (3-4) ◽  
pp. 151-157
Author(s):  
J. Escobar ◽  
A. Sarmiento ◽  
N. Obregón ◽  
J.M. Castillo
Keyword(s):  
Water Balance ◽  
Water Supply ◽  
New Technologies ◽  
Expert Knowledge ◽  
Thomas Model ◽  
Know How ◽  
Minimum Requirements ◽  
Technical Basis ◽  
Gis Software

In order to advance towards solving the problem of water supply in critical basins in Colombia, the Environmental Ministry and the Javeriana University formulated the technical basis for management of water supply in critical basins. The aim was at developing a methodology that handles in the most efficient way water resources in that kind of system. This guide proposes usage of new technologies for management. Basic geophysical characterization of basins was proposed to be carried out with free GIS software. For water balance, the Thomas model (abcd) was proposed. In addition, it is taken into account the minimum ecological flow rate and the minimum requirements for the control of water quality in the streams. The demand is calculated spatially in order to know how the water resource in basins should be distributed. With the results of water balance and water demand a Decision Support System (DSS) is proposed that joins both the technical results and the expert knowledge of the basin inhabitants. The methodology was applied in critical basins with different conditions and the results show a promising performance of the methodology.

scholarly journals Explicit CP violation in the Dine–Seiberg–Thomas model

2009 ◽  
Vol 65 (3-4) ◽  
pp. 517-522 ◽  
Author(s):  
S. W. Ham ◽  
Seong-A Shim ◽  
S. K. Oh
Keyword(s):  
Cp Violation ◽  
Thomas Model
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