Batch and Fixed Bed Column Studies on Cadmium (II) and Lead (II) Adsorption from Aqueous Solution by Coffee Pulp Biochar

2017 ◽  
Keyword(s):  
Aqueous Solution ◽  
Fixed Bed ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Coffee Pulp

scholarly journals Improvement of aqueous solution coexisting with arsenite and arsenate using iron mixed porous clay pellets in batch and fixed-bed column studies

2019 ◽  
Vol 19 (7) ◽  
pp. 1929-1937 ◽  
Author(s):  
Nguyen Chi Thanh ◽  
Boonchai Wichitsathian ◽  
Chatpet Yossapol ◽  
Watcharapol Wonglertarak ◽  
Borano Te
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Removal Rate ◽  
Fixed Bed ◽  
Polluted Water ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Phosphate Ions ◽  
Pseudo Second Order ◽  
Clay Pellets

Abstract Arsenic-polluted water is a global concern and puts millions of people at risk of developing cancer. The improvement of aqueous solution coexisting with arsenite and arsenate using iron mixed porous clay pellets was investigated in batch and fixed-bed column systems. Batch studies showed that the removal rate occurred in two main phases with an equilibrium time of 52 h. The pseudo-second-order model well described the experimental data. Isotherm data were well fitted by the Langmuir–Freundlich model. The removal efficiency was significantly reduced in alkaline solution and the presence of phosphate ions. The column study revealed that the breakthrough time and saturation time increased with lower feeding flow rate, higher bed height, and lower initial adsorbate concentration. The Thomas model provided good performance for predicting the column experimental data.

Continuous biosorption of nickel from aqueous solution using Chrysanthemum indicum derived biochar in a fixed-bed column

2017 ◽  
Vol 76 (7) ◽  
pp. 1895-1906 ◽  
Author(s):  
Sowmya Vilvanathan ◽  
S. Shanthakumar
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Ion Concentration ◽  
Column Studies ◽  
Nickel Ion ◽  
Fixed Bed Column ◽  
Nickel Ions ◽  
Chrysanthemum Indicum

The biosorption capability of Chrysanthemum indicum to remove nickel ions from aqueous solution in a fixed-bed column was examined in this study. Native C. indicum flower waste was improved for its biosorptive potential by pyrolysis to obtain its biochar form and, thereby, both raw (CIF-R) and biochar (CIF-BC) forms of the flower were used for Ni(II) removal. Fixed bed column studies were conducted to examine the influence of bed height (1.0–3.0 cm), flow rate (1.0–5.0 mL min−1) and initial metal ion concentration (25–75 mg L−1). The breakthrough curves (Cout/Cin vs time) were modelled using different dynamic adsorption models, viz. Adams-Bohart, Thomas and Yoon-Nelson model. Interpretation of the data revealed a favorable correlation with the Thomas model with higher R2 values and closer model-predicted and experimental biosorption capacity values. The equilibrium uptake capacity of CIF-R and CIF-BC for Ni(II) were found to be 14.02 and 29.44 mg g−1, respectively. Further, the column was regenerated using HCl as eluent, to desorb the adsorbed Ni(II) ions. The experimental results implied and affirmed the suitability of the biosorbents for nickel ion biosorption with its nature being favorable, efficient, and environmentally friendly.

scholarly journals Removal of Cr (VI) from aqueous solution by activated charcoal derived from Sapindus trifoliate L fruit biomass using continuous fixed bed column studies

2021 ◽  
Author(s):  
Samir Mohanta ◽  
Monaj Kumar Sahu ◽  
Prakash Chandra Mishra ◽  
Anil Kumar Giri
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Activated Charcoal ◽  
Fixed Bed ◽  
Maximum Adsorption Capacity ◽  
Thomas Model ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Initial Concentration ◽  
Bed Height

Abstract In this study, the removal of hexavalent chromium from aqueous solution were examined using activated charcoal derived from Sapindus trifoliate L fruit biomass in continuous fixed-bed column studies. The activated S. trifoliate L fruit charcoal was prepared by treating the fruit powder using concentrated nitric acid solution. Experiments were performed to investigate the effect of bed-height and initial concentration on the breakthrough and saturation times. The breakthrough and saturation time increases with increase in bed-height and initial concentration of chromium solutions. The maximum adsorption capacity of S. trifoliate L charcoal for hexavalent chromium was found to be 1.719 mg/g in the bed height 15 cm and initial concentration 10 mg/L, respectively. Column data required at various conditions were explained using Bohart-Adams and Thomas model. Two models were found to be suitable to describe the definite part of the dynamic behaviour of the column with regard to bed-height and initial concentration of hexavalent chromium. On comparison of Adjusted R2 and estimated standard error, the Thomas model was found to best-fitted model and can be used to predict the adsorption of the hexavalent chromium in fixed-bed column studies. Activated Sapindus trifoliate L fruit charcoal was characterised by SEM – EDX and FTIR analysis.

Batch and fixed bed column studies on nickel (II) adsorption from aqueous solution by treated polyurethane foam

2015 ◽  
Vol 55 ◽  
pp. 112-118 ◽  
Author(s):  
L. Mangaleshwaran ◽  
A. Thirulogachandar ◽  
V. Rajasekar ◽  
C. Muthukumaran ◽  
K. Rasappan
Keyword(s):  
Aqueous Solution ◽  
Polyurethane Foam ◽  
Fixed Bed ◽  
Column Studies ◽  
Fixed Bed Column
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