scholarly journals A quantitive microscale dynamic column breakthrough apparatus for measurement of unary and binary adsorption equilibrium on milligram quantities of adsorbent

2022 ◽  
Author(s):  
Nicholas Wilkins ◽  
James Sawada ◽  
Arvind Rajendran
Keyword(s):  
Activated Carbon ◽  
Adsorption Equilibrium ◽  
Low Cost ◽  
Small Scale ◽  
Binary Adsorption ◽  
Multicomponent Adsorption ◽  
Adsorption And Desorption ◽  
Zeolite 13X ◽  
Equilibrium Data ◽  
Breakthrough Experiments

A microscale dynamic column breakthrough (μDCB) apparatus with the ability to measure unary and binary adsorption equilibrium on a milligram-scale quantity of adsorbent is described. The μDCB is a low cost system that can be constructed through minor modifications of a commercial gas chromatograph and uses a thermal conductivity detector. The small scale of the apparatus allows for the rapid collection of dynamic column breakthrough experiments. The mass balances for adsorption and desorption experiments were derived along with a description of the blank. The μDCB apparatus was tested with 238.9 mg of zeolite 13X and 180.2 mg of activated carbon with single-component N2/He and CH4/He adsorption and desorption measurements. The measured equilibrium data agreed well with volumetrically collected data. These measurements are both accurate and precise. Multicomponent adsorption was also studied on zeolite 13X and activated carbon for CH4/N2 and CO2/CH4 mixtures. This data was compared with ideal and adsorbed solution theory, extended dual-site Langmuir calculations and the literature.

Adsorptive Removal of Pb(II) Ion from Aqueous Solution Using Rice Husk-Based Activated Carbon

2014 ◽  
Vol 875-877 ◽  
pp. 196-201 ◽  
Author(s):  
Mohd Faisal Taha ◽  
Ahmad S. Rosman ◽  
Maizatul S. Shaharun
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Rice Husk ◽  
Low Cost ◽  
Chemical Activation ◽  
Textural Properties ◽  
Activation Process ◽  
Adsorption Studies ◽  
Three Samples ◽  
Equilibrium Data

The potential of rice husk-based activated carbon as an alternative low-cost adsorbent for the removal of Pb (II) ion from aqueous solution was investigated. Rice husk-based activated carbon was preparedviachemical activation process using NaOH followed by the carbonization process at 500°C. Morphological analysis was conducted using field-emission scanning electron microscope /energy dispersive X-ray (FESEM/EDX) on three samples, i.e. raw rice husk, rice husk treated with NaOH and rice husk-based activated carbon. These three samples were also analyzed for their C, H, N, O and Si contents using CHN elemental analyzer and FESEM/EDX. The textural properties of rice husk-based activated carbon, i.e. surface area (253 m2/g) and pore volume (0.17 cm2/g), were determined by N2adsorption. The adsorption studies using rice husk-based activated carbon as an adsorbent to remove Pb (II) ion from aqueous solution were carried out at a fixed initial concentration of Pb (II) ion (150 ppm) with varying adsorbent dose as a function of contact time at room temperature. The concentration of Pb (II) ion was determined by atomic absorption spectrophotometer (AAS). The removal of Pb (II) ion from aqueous solution increased from 35 % to 82 % when the amount of rice husk-based activated carbon was increased from 0.05 g to 0.30 g. The equilibrium data obtained from adsorption studies was found to fit both Langmuir and Freundlich adsorption isotherms.

Binary adsorption equilibrium of organics and water on activated carbon

AIChE Journal ◽  
2001 ◽  
Vol 47 (8) ◽  
pp. 1885-1892 ◽  
Author(s):  
M. J. G. Linders ◽  
L. J. P. van den Broeke ◽  
F. Kapteijn ◽  
J. A. Moulijn ◽  
J. J. G. M. van Bokhoven
Keyword(s):  
Activated Carbon ◽  
Adsorption Equilibrium ◽  
Binary Adsorption

Molecular Simulation of Propane−Propylene Binary Adsorption Equilibrium in Zeolite 13X

2007 ◽  
Vol 46 (22) ◽  
pp. 7239-7245 ◽  
Author(s):  
Miguel A. Granato ◽  
Thijs J. H. Vlugt ◽  
Alírio E. Rodrigues
Keyword(s):  
Molecular Simulation ◽  
Adsorption Equilibrium ◽  
Binary Adsorption ◽  
Zeolite 13X

Characterization of the Corallina Elongata Alga and Study of its Biosorption Properties for Methylene Blue

2019 ◽  
Vol 41 (1) ◽  
pp. 62-62
Author(s):  
Farida Bouremmad Farida Bouremmad ◽  
Abdennour Bouchair Abdennour Bouchair ◽  
Sorour Semsari Parapari Sorour Semsari Parapari ◽  
Shalima Shawuti and Mehmet Ali Gulgun Shalima Shawuti and Mehmet Ali Gulgun
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Mediterranean Coast ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Aquatic Biomass ◽  
Equilibrium Data

Biosorbents can be an alternative to activated carbon. They are derived from agricultural by-products or aquatic biomass. They are low cost and they may have comparable performances to those of activated carbon. The present study focuses on the characterization of the Corallina Elongata (CE) alga and its adsorption performance for Methylene Blue (MB), this alga is found in abundance at the Mediterranean coast of the city of Jijel in eastern Algeria. The dried alga was characterized using various characterization techniques such as DTA, TG, FTIR, XRD, SEM and EDX, which showed that the material consists essentially of a calcite containing magnesium. Batch adsorption studies were carried out and the effect of experimental parameters Such as pH, initial dye concentration, temperature, adsorbent dose and contact time, on the adsorption of MB was studied. The kinetic experimental data were found to conform to the pseudo-second-order model with good correlation and equilibrium data were best fitted to The Langmuir model, with a maximum adsorption capacity of 34.4 mg/g. The adsorption isotherms at various temperatures allowed the determination of certain thermodynamic parameters (ΔG, ΔH and ΔS). Finally, the adsorption results showed a good affinity between CE and MB with a high adsorption capacity.

scholarly journals Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Xiaotao Zhang ◽  
Yinan Hao ◽  
Ximing Wang ◽  
Zhangjing Chen ◽  
Chun Li
Keyword(s):  
Activated Carbon ◽  
High Efficiency ◽  
Metal Removal ◽  
Chemical Interaction ◽  
Low Cost ◽  
Heavy Metal Removal ◽  
Metal System ◽  
Experimental Conditions ◽  
Equilibrium Data ◽  
Adsorption Equilibrium Data

This paper presents low-cost and recyclable activated carbon (XLAC) derived from Xanthoceras sorbifolia Bunge hull for high-efficiency adsorption of Cd(II) and Hg(II) ions in industrial wastewater. XLAC was prepared through H3PO4 activation and was characterized using N2 adsorption-desorption, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDX), and Fourier transform infrared (FTIR) spectroscopy. In single-metal-system adsorption experiments, the maximum adsorption capacities for Cd(II) and Hg(II) obtained under different experimental conditions were 388.7 and 235.6 mg·g−1, respectively. All adsorption equilibrium data fit perfectly with the Langmuir isotherm model. In a binary metal system, competitive studies demonstrated that the presence of Cd(II) significantly decreased the adsorption of Hg(II), but the adsorption of Cd(II) showed a little change in the presence of Hg(II). In addition, XLAC can be regenerated with a 0.01 mol·L−1 HNO3 solution and reused at least four times. The FTIR spectra revealed that a chemical interaction occurs between functional groups containing lone electron pairs in XLAC and metal ions. Overall, these results suggest that XLAC may be suitable as an adsorbent for heavy metal removal from wastewater streams.

Adsorption equilibrium data for substituted phenols on activated carbon

1992 ◽  
Vol 37 (2) ◽  
pp. 175-179 ◽  
Author(s):  
Irfan Z. Shirgaonkar ◽  
Hemant S. Joglekar ◽  
Vishwas D. Mundale ◽  
Jyeshtharaj B. Joshi
Keyword(s):  
Activated Carbon ◽  
Adsorption Equilibrium ◽  
Substituted Phenols ◽  
Equilibrium Data ◽  
Adsorption Equilibrium Data

scholarly journals Modeling of Adsorption Isotherms of Caffeine onto Groundnut Shell as a Low Cost Adsorbent

2020 ◽  
Vol 8 (3) ◽  
pp. 1191-1195
Keyword(s):  
Adsorption Isotherm ◽  
Adsorption Isotherms ◽  
Adsorption Equilibrium ◽  
Low Cost ◽  
Emerging Pollutants ◽  
Linear Forms ◽  
Equilibrium Data ◽  
Groundnut Shell ◽  
Modeling Of Adsorption ◽  
Adsorption Equilibrium Data

Caffeine is a chemical compound that has been detected in the environment and belongs to some of the most popular emerging pollutants that may cause serious environmental and human health problems. In this study, the adsorption of caffeine on groundnut shell as low cost adsorbent was investigated using the batch equilibrium method. Three adsorption isotherms namely the Langmuir, Freundlich and Redlich–Peterson isotherms in their non-linear forms were applied to the adsorption equilibrium data. Both the Langmuir and Redlich–Peterson models were found to fit the adsorption isotherm data well. The retention of caffeine on the groundnut shell showed a relatively significant adsorption with a maximal quantity of 4.21 mg g-1. The present study showed that the powdered groundnut shell is a promising and alternative adsorbent for the removal of caffeine from aqueous solutions.

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