Micropollutant Mass Transfer Zones in Granular Activated Carbon Contactors

2021 ◽  
Author(s):  
Jie Yuan ◽  
Armin Safari ◽  
Paul Lugo ◽  
Laura Alvarez ◽  
Ronald Hofmann
Keyword(s):  
Mass Transfer ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Transfer Zones

scholarly journals Modeling of the adsorption kinetics of zinc onto granular activated carbon and natural zeolite

2006 ◽  
Vol 71 (8-9) ◽  
pp. 957-967 ◽  
Author(s):  
Ljiljana Markovska ◽  
Vera Meshko ◽  
Mirko Marinkovski
Keyword(s):  
Mass Transfer ◽  
Activated Carbon ◽  
Simulation Study ◽  
Natural Zeolite ◽  
Granular Activated Carbon ◽  
Model Parameters ◽  
Mass Transfer Resistance ◽  
External Mass Transfer ◽  
Transfer Resistance ◽  
Kinetics Of

The isotherms and kinetics of zinc adsorption from aqueous solution onto granular activated carbon (GAC) and natural zeolite were studied using an agitated batch adsorber. The maximum adsorption capacities of GAC and natural zeolite towards zinc(II) from Langmuir adsorption isotherms were determined using experimental adsorption equilibrium data. The homogeneous solid diffusion model (HSD-model) combined with external mass transfer resistance was applied to fit the experimental kinetic data. The kinetics simulation study was performed using a computer program based on the proposed mathematical model and developed using gPROMS. As the two-mass transfer resistance approach was applied, two model parameters were fitted during the simulation study. External mass transfer and solid phase diffusion coefficients were obtained to predict the kinetic curves for varying initial Zn(II) concentration at constant agitation speed and constant adsorbent mass. For any particular Zn(II) - adsorbent system, k f was constant, except for the lowest initial concentration, while D s was found to increase with increasing initial Zn(II) concentration.

Evaluation of mass transfer mechanisms involved during the adsorption of metronidazole on granular activated carbon in fixed bed column

2020 ◽  
Vol 36 ◽  
pp. 101303 ◽  
Author(s):  
V. Díaz-Blancas ◽  
C.G. Aguilar-Madera ◽  
J.V. Flores-Cano ◽  
R. Leyva-Ramos ◽  
E. Padilla-Ortega ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Activated Carbon ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
Fixed Bed Column ◽  
Transfer Mechanisms

Analysis of the effect of the operational conditions in a combined adsorption–ozonation process with granular activated carbon for the treatment of phenol wastewater

2020 ◽  
Vol 5 (4) ◽  
pp. 760-778 ◽  
Author(s):  
Cristian Ferreiro ◽  
Natalia Villota ◽  
Ana de Luis ◽  
Jose Ignacio Lombraña
Keyword(s):  
Mass Transfer ◽  
Activated Carbon ◽  
Chemical Reaction ◽  
Granular Activated Carbon ◽  
Adsorption Parameters ◽  
Operational Conditions ◽  
S Model ◽  
Ozonation Process ◽  
Phenol Wastewater

Analysis of phenol ozonation using a G–L–S model: through mass transfer, chemical reaction and adsorption parameters.

Effect of ozonation on preloading of background organic matter in granular activated carbon filters

1997 ◽  
Vol 35 (7) ◽  
pp. 295-302 ◽  
Author(s):  
Ervin Orlandini ◽  
Tsegaye G. Gebereselassie ◽  
Joop C. Kruithof ◽  
Jan C. Schippers
Keyword(s):  
Mass Transfer ◽  
Organic Matter ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Fixed Bed ◽  
Granular Activated Carbon ◽  
River Rhine ◽  
Homogeneous Surface

Background Organic Matter (BOM) preloading is adsorption of BOM onto Granular Activated Carbon (GAC) prior to the adsorption of target compounds, such as pesticides and other organic micropollutants (e.g. atrazine). BOM preloading is commonly found to speed up the breakthrough of target compounds during GAC filtration. Ozonation of GAC filter influent may be expected to lower BOM preloading, because it results in less adsorbable and more biodegradable BOM compounds. Short Fixed Bed (SFB) tests with virgin and preloaded GAC, performed within this study, confirmed that preloading of BOM present in pretreated river Rhine water speeds up the breakthrough of atrazine in GAC filters. BOM preloading was found to lower equilibrium adsorption capacity of GAC for atrazine, and to slow down both external and internal mass transfer rate of atrazine on/into GAC. Adsorption capacity of (crushed) GAC was determined from atrazine adsorption isotherms, while mass transfer rate coefficients were determined by fitting the Homogeneous Surface Diffusion model to the breakthrough of atrazine in the SFB tests. More pronounced BOM preloading was found in the GAC filter receiving non-ozonated influent than in its ozonated counterpart. Biodegradation of ozonated BOM was shown to lower BOM preloading in GAC filters.

Thermal stability and decomposition of perfluoroalkyl substances on spent granular activated carbon

2020 ◽  
Author(s):  
Feng Xiao ◽  
Bin Yao ◽  
Pavankumar Challa Sasi ◽  
Svetlana Golovko ◽  
Dana Soli ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Perfluoroalkyl Substances

Cost-effective water treatment of polluted surface water by using direct filtration and granular activated carbon filtration

2002 ◽  
Vol 2 (1) ◽  
pp. 233-240 ◽  
Author(s):  
J. Cromphout ◽  
W. Rougge
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Treatment Process ◽  
Treatment Plant ◽  
Granular Activated Carbon ◽  
Cost Effective ◽  
Water Treatment Plant ◽  
Direct Filtration ◽  
Carbon Filtration ◽  
Effective Water

In Harelbeke a Water Treatment Plant with a capacity of 15,000 m3/day, using Schelde river water has been in operation since April 1995. The treatment process comprises nitrification, dephosphatation by direct filtration, storage into a reservoir, direct filtration, granular activated carbon filtration and disinfection. The design of the three-layer direct filters was based on pilot experiments. The performance of the plant during the five years of operation is discussed. It was found that the removal of atrazin by activated carbon depends on the water temperature.

REPRODUCIBILITY OF GRANULAR ACTIVATED CARBON FOR DYE TRACER DETECTION

2017 ◽  
Author(s):  
Zachary L. Oretsky ◽  
◽  
Daniel Lehrmann ◽  
Geary M. Schindel
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Dye Tracer
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