scholarly journals Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions

2013 ◽  
Vol 27 (2) ◽  
Author(s):  
O.S. Bello ◽  
O.A. Olusegun ◽  
V.O. Njoku
Keyword(s):  
Activated Carbon ◽  
Fly Ash ◽  
Aqueous Solutions ◽  
Powdered Activated Carbon

Mechanism and kinetic considerations of TOC removal from the powdered activated carbon ozonation of diclofenac aqueous solutions

2009 ◽  
Vol 169 (1-3) ◽  
pp. 532-538 ◽  
Author(s):  
Fernando J. Beltrán ◽  
J. Pablo Pocostales ◽  
Pedro M. Alvarez ◽  
Josefa Jaramillo
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Powdered Activated Carbon ◽  
Toc Removal

scholarly journals Separation Cum Pre-Concentration Technique for Determination of Uranium in Sea, Brine and Ground Water at Nano to Sub nanogram Levels

2020 ◽  
pp. 302-312
Author(s):  
Leela Gopal ◽  
V. V. Hanuman ◽  
G. Chakrapani
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Ground Water ◽  
Contact Time ◽  
Sea Water ◽  
Cost Effective ◽  
Powdered Activated Carbon ◽  
Concentration Technique ◽  
Led Fluorimetry

Investigations were carried out for separation/pre concentration of uranium from aqueous solutions of different TDS using Powdered Activated Carbon (PAC). Parameters like amount of PAC, contact time, pH, volume of solutions and reagents for desorption were optimized. The sorption of uranium is more than 95% at pH 4-5 using 0.5 gram PAC with a contact time of 10 minutes.  The sorbed uranium on PAC is recovered using 0.8N HNO<sub>3</sub> and determined by LED Fluorimetry.  Method was successfully applied to ground water, sea water and brine water.  Methodology is simple, selective, cost effective with minimal skills. RSD of the method varies ± 6-14 %.

scholarly journals Sorption-desorption isotherms of dyes from aqueous solutions and wastewaters with different sorbent meterials

2013 ◽  
Vol 4 (1) ◽  
pp. 75-83
Keyword(s):  
Activated Carbon ◽  
Fly Ash ◽  
Aqueous Solutions ◽  
Low Cost ◽  
Bleaching Earth ◽  
Sorption Model ◽  
Isotherm Equation ◽  
Linear Sorption ◽  
By Products ◽  
Dye Solutions

The ability of activated carbon and different low-cost by-products and waste material as sorbents to remove various reactive dyes from aqueous solutions and wastewaters was investigated. All aqueous dye solutions contained 2,000 mg l-1 NaCl, to mimic real dye wastewater. Batch kinetic and isotherm experiments were conducted to determine the sorption-desorption behavior of the examined dyes from aqueous solutions and wastewaters by different sorbents, including activated carbon, fly ash, bentonite and bleaching earth. The results from the aqueous solutions indicate that the form of the isotherm equation is not necessarily unique for best description of both sorption and desorption data. The values of the isotherm parameters are not the same, indicating a significant hysteresis effect. Of the 9 sorption systems tested, 5 are best described by the Freundlich, 3 by the Langmuir and 1 by the linear sorption model. Of the 7 desorption systems tested, 5 are best described by the Freundlich and 2 by the linear model. In all cases, the sorption capacity for dye removal was higher for activated carbon, followed by fly-ash and then by bentonite.

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