Breakthrough curve modeling of graphene oxide aerogel packed fixed bed column for the removal of Cr(VI) from water

2017 ◽  
Vol 18 ◽  
pp. 150-158 ◽  
Author(s):  
Devendra Kumar Singh ◽  
Vijay Kumar ◽  
Sweta Mohan ◽  
Daraksha Bano ◽  
Syed Hadi Hasan
Keyword(s):  
Graphene Oxide ◽  
Breakthrough Curve ◽  
Fixed Bed ◽  
Fixed Bed Column ◽  
Curve Modeling ◽  
Graphene Oxide Aerogel

Fixed-Bed Adsorption Column Studies for the Removal of Methyl Orange from Water Using Polyethyleneimine-Graphene Oxide Polymer Nanocomposite Beads

2021 ◽  
Vol 891 ◽  
pp. 31-36
Author(s):  
Jirah Emmanuel T. Nolasco ◽  
Camille Margaret S. Alvarillo ◽  
Joshua L. Chua ◽  
Ysabel Marie C. Gonzales ◽  
Jem Valerie D. Perez
Keyword(s):  
Graphene Oxide ◽  
Methyl Orange ◽  
Large Scale ◽  
Scale Up ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Design Parameters ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Adsorption Column

Continuous fixed-bed column studies were performed using nanocomposite beads made up of chitosan, polyethyleneimine, and graphene oxide as adsorbents for the removal of methyl orange (MO) in water. The effects of different operating parameters such as initial MO concentration (5, 10, and 15 ppm), bed height (10, 17.5, and 25 cm), and flow rate (27, 43, and 58 mL/min) were investigated using an upward-flow fixed-bed column set-up. The breakthrough curves generated were fitted with Adams-Bohart, Thomas, Yoon-Nelson, and Yan et al. models. The results showed that Yan et al. model agreed best with the breakthrough curves having an R2 as high as 0.9917. Lastly, design parameters for a large-scale adsorption column were determined via scale-up approach using the parameters obtained from column runs.

Modelling of fixed bed column containing graphene oxide decorated by MgO nanocubes as adsorbent for Lead(II) removal from water

2017 ◽  
Vol 17 ◽  
pp. 216-228 ◽  
Author(s):  
Sweta Mohan ◽  
Devendra Kumar Singh ◽  
Vijay Kumar ◽  
Syed Hadi Hasan
Keyword(s):  
Graphene Oxide ◽  
Fixed Bed ◽  
Fixed Bed Column

scholarly journals Adsorption of methyl tert-butyl ether (MTBE) onto ZSM-5 zeolite: Fixed-bed column tests, breakthrough curve modelling and regeneration

Chemosphere ◽  
2019 ◽  
Vol 220 ◽  
pp. 422-431 ◽  
Author(s):  
Yunhui Zhang ◽  
Fei Jin ◽  
Zhengtao Shen ◽  
Fei Wang ◽  
Rod Lynch ◽  
...  
Keyword(s):  
Breakthrough Curve ◽  
Fixed Bed ◽  
Methyl Tert Butyl Ether ◽  
Column Tests ◽  
Butyl Ether ◽  
Fixed Bed Column ◽  
Tert Butyl

scholarly journals Batch and fixed-bed column study for p-nitrophenol, methylene blue, and U(VI) removal by polyvinyl alcohol–graphene oxide macroporous hydrogel bead

2017 ◽  
Vol 77 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Dan Chen ◽  
Jun Zhou ◽  
Hongyu Wang ◽  
Kai Yang
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Fixed Bed ◽  
Column Experiments ◽  
Maximum Adsorption Capacity ◽  
Fixed Bed Column ◽  
Hydrogel Bead ◽  
Bdst Model ◽  
Adsorption Capacities

Abstract There is an increasing need to explore effective and clean approaches for hazardous contamination removal from wastewaters. In this work, a novel bead adsorbent, polyvinyl alcohol–graphene oxide (PVA-GO) macroporous hydrogel bead was prepared as filter media for p-nitrophenol (PNP), dye methylene blue (MB), and heavy metal U(VI) removal from aqueous solution. Batch and fixed-bed column experiments were carried out to evaluate the adsorption capacities of PNP, MB, and U(VI) on this bead. From batch experiments, the maximum adsorption capacities of PNP, MB, and U(VI) reached 347.87, 422.90, and 327.55 mg/g. From the fixed-bed column experiments, the adsorption capacities of PNP, MB, and U(VI) decreased with initial concentration increasing from 100 to 400 mg/L. The adsorption capacities of PNP, MB, and U(VI) decreased with increasing flow rate. Also, the maximum adsorption capacity of PNP decreased as pH increased from 3 to 9, while MB and U(VI) presented opposite tendencies. Furthermore, the bed depth service Time (BDST) model showed good linear relationships for the three ions' adsorption processes in this fixed-bed column, which indicated that the BDST model effectively evaluated and optimized the adsorption process of PVA-GO macroporous hydrogel bead in fixed-bed columns for hazardous contaminant removal from wastewaters.

scholarly journals Fixed-Bed Column Technique for the Removal of Phosphate from Water Using Leftover Coal

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5466
Author(s):  
Dereje Tadesse Mekonnen ◽  
Esayas Alemayehu ◽  
Bernd Lennartz
Keyword(s):  
Flow Rate ◽  
Breakthrough Curve ◽  
Nutrient Loading ◽  
Fixed Bed ◽  
Phosphate Concentration ◽  
Design Parameters ◽  
Phosphate Adsorption ◽  
Fixed Bed Column ◽  
Adsorption Sites ◽  
Bed Height

The excessive discharge of phosphate from anthropogenic activities is a primary cause for the eutrophication of aquatic habitats. Several methodologies have been tested for the removal of phosphate from aqueous solutions, and adsorption in a flow-through reactor is an effective mechanism to reduce the nutrient loading of water. This research aimed to investigate the adsorption potential of leftover coal material to remove phosphate from a solution by using continuous flow fixed-bed column, and analyzes the obtained breakthrough curves. A series of column tests were performed to determine the phosphorus breakthrough characteristics by varying operational design parameters such as adsorbent bed height (5 to 8 cm), influent phosphate concentration (10–25 mg/L), and influent flow rate (1–2 mL/min). The amorphous and crystalline property of leftover coal material was studied using XRD technology. The FT-IR spectrum confirmed the interaction of adsorption sites with phosphate ions. Breakthrough time decreased with increasing flow rate and influent phosphate concentration, but increased with increasing adsorbent bed height. Breakthrough-curve analysis showed that phosphate adsorption onto the leftover coal material was most effective at a flow rate of 1 mL/min, influent phosphate concentration of 25 mg/L, and at a bed height of 8 cm. The maximal total phosphate adsorbed onto the coal material’s surface was 243 mg/kg adsorbent. The Adams–Bohart model depicted the experimental breakthrough curve well, and overall performed better than the Thomas and Yoon–Nelson models did, with correlation values (R2) ranging from 0.92 to 0.98. Lastly, leftover coal could be used in the purification of phosphorus-laden water, and the Adams–Bohart model can be employed to design filter units at a technical scale.

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