Na+ - NH4+ cation exchange study on treated zeolitic volcanic tuff in fixed bed column

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.

Download Full-text

Comparison of batch and fixed bed column adsorption: a critical review

International Journal of Environmental Science and Technology ◽

10.1007/s13762-021-03492-y ◽

2021 ◽

Author(s):

H. Patel

Keyword(s):

Critical Review ◽

Fixed Bed ◽

Fixed Bed Column ◽

Column Adsorption

Download Full-text

Graphene oxide–coated pyrolysed biochar from waste sawdust and its application for treatment of cadmium-containing solution: batch, fixed-bed column, regeneration, and mathematical modelling

Biomass Conversion and Biorefinery ◽

10.1007/s13399-020-01153-7 ◽

2021 ◽

Author(s):

Vijoyeta Chakraborty ◽

Papita Das ◽

Pankaj Kumar Roy

Keyword(s):

Graphene Oxide ◽

Mathematical Modelling ◽

Fixed Bed ◽

Fixed Bed Column

Download Full-text

Biochar caged zirconium ferrite nanocomposites for the adsorptive removal of Reactive Blue 19 dye in a batch and column reactors and conditions optimizaton

Zeitschrift für Physikalische Chemie ◽

10.1515/zpch-2020-1749 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Shazia Perveen ◽

Raziya Nadeem ◽

Shaukat Ali ◽

Yasir Jamil

Keyword(s):

Experimental Data ◽

Low Dose ◽

Fixed Bed ◽

Breakthrough Curves ◽

Adsorption Efficiency ◽

Fixed Bed Column ◽

Flow Rates ◽

Adsorptive Removal ◽

Reactive Blue 19 ◽

Pseudo Second Order

Abstract Biochar caged zirconium ferrite (BC-ZrFe2O5) nanocomposites were fabricated and their adsorption capacity for Reactive Blue 19 (RB19) dye was evaluated in a fixed-bed column and batch sorption mode. The adsorption of dye onto BC-ZrFe2O5 NCs followed pseudo-second-order kinetics (R 2 = 0.998) and among isotherms, the experimental data was best fitted to Sips model as compared to Freundlich and Langmuir isotherms models. The influence of flow-rate (3–5 mL min−1), inlet RB19 dye concentration (20–100 mg L−1) and quantity of BC-ZrFe2O5 NCs (0.5–1.5 g) on fixed-bed sorption was elucidated by Box-Behnken experimental design. The saturation times (C t /C o = 0.95) and breakthrough (C t /C o = 0.05) were higher at lower flow-rates and higher dose of BC-ZrFe2O5 NCs. The saturation times decreased, but breakthrough was increased with the initial RB19 dye concentration. The treated volume was higher at low sorbent dose and influent concentration. Fractional bed utilization (FBU) increased with RB19 dye concentration and flow rates at low dose of BC-ZrFe2O5 NCs. Yan model was fitted best to breakthrough curves data as compared to Bohart-Adams and Thomas models. Results revealed that BC-ZrFe2O5 nanocomposite has promising adsorption efficiency and could be used for the adsorption of dyes from textile effluents.

Download Full-text

Optimization of a fixed bed column adsorption of Fast Green dye on used black tea leaves from aqueous solution

Journal of the Iranian Chemical Society ◽

10.1007/s13738-021-02310-z ◽

2021 ◽

Author(s):

Rasel Ahmed ◽

Mohammad Abul Hossain

Keyword(s):

Aqueous Solution ◽

Fixed Bed ◽

Black Tea ◽

Tea Leaves ◽

Fast Green ◽

Fixed Bed Column ◽

Column Adsorption

Download Full-text