Fixed-bed adsorption of tannery wastewater pollutants using bottom ash: An optimized process

2009 ◽

Vol 9 (6) ◽

pp. 661-670 ◽

Cited By ~ 2

Author(s):

S. P. Dubey ◽

K. Gopal

Keyword(s):

Aqueous Solution ◽

Hexavalent Chromium ◽

Fixed Bed ◽

Entropy Change ◽

Spectroscopic Technique ◽

Fixed Bed Column ◽

Chromium Vi ◽

Fixed Bed Adsorption ◽

Optimal Column ◽

Eucalyptus Bark

The activated carbon of Eucalyptus globulus was tested for their effectiveness in removing hexavalent chromium from aqueous solution using column experiments. Result revealed that adsorption of chromium(VI) on eucalyptus bark carbon was endothermic in nature. Thermodynamic parameters such as the entropy change, enthalpy change and Gibbs free energy change were found to be 1.39 kJ mol−1 K−1, 1.08 kJ mol−1 and −3.85 kJ mol−1, respectively. Different chromium concentrations were used for the fixed bed adsorption studies. The pre- and post-treated adsorbents were characterized using a FTIR spectroscopic technique. It was concluded that Eucalyptus bark carbon column could be used effectively for removal of hexavalent chromium from aqueous solution at optimal column conditions. This study showed that this biological material is potential adsorbent of Cr(VI) from water.

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Selective recovery of rare earth elements with ligand-functionalized polymers in fixed-bed adsorption columns

Separation and Purification Technology ◽

10.1016/j.seppur.2021.118472 ◽

2021 ◽

Vol 265 ◽

pp. 118472

Author(s):

Jonathan C. Callura ◽

Qingyang Shi ◽

David A. Dzombak ◽

Athanasios K. Karamalidis

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Fixed Bed ◽

Functionalized Polymers ◽

Selective Recovery ◽

Fixed Bed Adsorption

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Fixed-bed adsorption of Reactive Orange 84 dye onto activated carbon prepared from empty cotton flower agro-waste

Sustainable Environment Research ◽

10.1016/j.serj.2018.09.003 ◽

2018 ◽

Vol 28 (6) ◽

pp. 298-308 ◽

Cited By ~ 16

Author(s):

Samir Charola ◽

Rahul Yadav ◽

Prasanta Das ◽

Subarna Maiti

Keyword(s):

Activated Carbon ◽

Fixed Bed ◽

Fixed Bed Adsorption ◽

Reactive Orange

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Potential of Araucaria angustifolia bark as adsorbent to remove Gentian Violet dye from aqueous effluents

Water Science & Technology ◽

10.2166/wst.2018.448 ◽

2018 ◽

Vol 78 (8) ◽

pp. 1693-1703 ◽

Cited By ~ 18

Author(s):

Jordana Georgin ◽

Fernanda Caroline Drumm ◽

Patrícia Grassi ◽

Dison Franco ◽

Daniel Allasia ◽

...

Keyword(s):

Gentian Violet ◽

Low Cost ◽

Fixed Bed ◽

Amorphous Structure ◽

Maximum Adsorption Capacity ◽

Araucaria Angustifolia ◽

Wood Processing ◽

Fixed Bed Adsorption ◽

Aqueous Effluents ◽

Equilibrium Data

Abstract Araucaria angustifolia bark (AA-bark), a waste generated in wood processing, was evaluated as a potential adsorbent to remove Gentian Violet (GV) dye from aqueous solutions. The AA-bark presented an amorphous structure with irregular surface and was composed mainly of lignin and holocellulose. These characteristics indicated that the adsorbent contains available sites to accommodate the dye molecules. The GV adsorption on AA-bark was favored at pH 8.0 with adsorbent dosage of 0.80 g L−1. Pseudo-nth order model was adequate to represent the adsorption kinetics of GV on AA-bark. A fast adsorption rate was verified, with the equilibrium being attained within 30 min. Equilibrium data were well represented by the Langmuir model. The maximum adsorption capacity was 305.3 mg g−1. Adsorption was spontaneous, favorable and endothermic. AA-bark was able to treat a simulated dye house effluent, reaching color removal values of 80%. An excellent performance was found in fixed bed experiments, where the length of the mass transfer zone was only 5.38 cm and the breakthrough time was 138.5 h. AA-bark can be regenerated two times using HNO3 0.5 mol L−1. AA-bark can be used as a low-cost material to treat colored effluents in batch and fixed bed adsorption systems.

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Column Efficiency of Fluoride Removal Using Quaternized Palm Kernel Shell (QPKS)

International Journal of Chemical Engineering ◽

10.1155/2019/5743590 ◽

2019 ◽

Vol 2019 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Ayu Haslija Abu Bakar ◽

Luqman Chuah Abdullah ◽

Nur Amirah Mohd Zahri ◽

Ma’an Alkhatib

Keyword(s):

Fluoride Concentration ◽

Fixed Bed ◽

Palm Kernel ◽

Fluoride Removal ◽

Trimethylammonium Chloride ◽

Transfer Resistance ◽

Adsorption Models ◽

Palm Kernel Shell ◽

Bed Height ◽

Fixed Bed Adsorption

In this research, the adsorption potential of quaternized palm kernel shell (QPKS) to remove F− from aqueous solution was investigated using fixed-bed adsorption column. Raw palm kernel shell waste was reacted with 3-chloro-2-hydroxypropyl trimethylammonium chloride (CHMAC) in order to modify the surface charge. The effects of inlet F− concentrations (2–12 mg/l) and QPKS bed height (2–10 cm) with optimum pH (pH = 3) on the breakthrough characteristics of the adsorption system were determined. In the fixed-bed column, breakthrough time increases with increasing bed height due to increasing amount of active site on adsorbents to adsorb the fluoride ion. Decreasing trend of breakthrough values was obtained with increasing initial fluoride concentration due to greater driving force for the transfer process to overcome the mass transfer resistance in the column. The adsorptions were fitted to three well-established fixed-bed adsorption models, namely, Thomas, Yoon–Nelson, and Adams–Bohart models. The results fitted well to the Thomas and Yoon–Nelson models with correlation coefficient, R2 ≥ 0.96.

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