Competitive adsorption of a benzene–toluene mixture on activated carbons at low concentration

Carbon ◽  
2006 ◽  
Vol 44 (8) ◽  
pp. 1455-1463 ◽  
Author(s):  
M.A. Lillo-Ródenas ◽  
A.J. Fletcher ◽  
K.M. Thomas ◽  
D. Cazorla-Amorós ◽  
A. Linares-Solano
Keyword(s):  
Competitive Adsorption ◽  
Activated Carbons ◽  
Low Concentration ◽  
Benzene Toluene

scholarly journals Adsorption Equilibria in Carbon/Hydrocarbon/Water Systems

1997 ◽  
Vol 15 (2) ◽  
pp. 109-114 ◽  
Author(s):  
N.A. Eltekova ◽  
Yu.A. Eltekov
Keyword(s):  
Aqueous Solution ◽  
Activated Carbons ◽  
Water Systems ◽  
Purification Process ◽  
Volume Filling ◽  
Liquid Phase Adsorption ◽  
Adsorption Equilibria ◽  
Good Accord ◽  
Benzene Toluene ◽  
Experimental Values

Two equations derived from the theory of volume filling of micropores (the DR and DS equations) were used for the description of the liquid-phase adsorption of benzene, toluene and p-xylene from aqueous solution on to two commercial microporous activated carbons. Comparison of the experimental and calculated adsorption isotherms showed good accord between the theoretical and experimental values. The results of this work indicate that the parameters of these equations can be used for modelling a water purification process based on the activated carbons.

scholarly journals Removal Effect of Atrazine in Co-Solution with Bisphenol A or Humic Acid by Different Activated Carbons

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2558 ◽  
Author(s):  
Zhansheng Wu ◽  
Xinhui Wei ◽  
Yongtao Xue ◽  
Xiufang He ◽  
Xia Yang
Keyword(s):  
Humic Acid ◽  
Bisphenol A ◽  
Adsorption Kinetics ◽  
Competitive Adsorption ◽  
Activated Carbons ◽  
Second Order ◽  
Adsorption Behavior ◽  
Single Solution ◽  
Pseudo Second Order ◽  
Kinetics Of

Activated carbons (ACs) based on apricot shells (AS), wood (W), and walnut shells (WS) were applied to adsorb atrazine in co-solutions. To study the effect of Bisphenol A (BPA) on the adsorption behavior of atrazine, the adsorption performance of ACs for BPA in single solution was studied. The results demonstrated that the adsorption kinetics of BPA fitted the pseudo-second-order model, the adsorption isotherms of BPA followed the Langmuir model. Meanwhile, the adsorption kinetics of atrazine fitted the pseudo-second-order kinetics model and the isotherm was consistent with the Freundlich model both in single solution and co-solution. In addition, competitive adsorption was observed when atrazine coexisted with BPA or humic acid. For the adsorption capacity, the adsorption amount of ASAC, WAC, and WSAC for atrazine obviously decreased by 18.0%, 30.0%, and 30.3% in the presence of BPA, respectively, which was due to the π−π interactions, hydrophobic interactions, and H-bonds, resulting in the competitive adsorption between atrazine and BPA. This study contributes to the further understanding of the adsorption behavior for atrazine in co-solution.

Use of a Polynomial Equation for Analyzing Low-Concentration Adsorption Measurements of Ethane on Activated Carbons

1989 ◽  
Vol 24 (15) ◽  
pp. 1355-1361 ◽  
Author(s):  
Mieczyslaw Jaroniec ◽  
Xiaochun Lu ◽  
Richard Madey ◽  
Jerzy Choma
Keyword(s):  
Activated Carbons ◽  
Polynomial Equation ◽  
Low Concentration

Assessment of various carbon-based adsorbents for separation of BTX from aqueous solution

2015 ◽  
Vol 15 (3) ◽  
pp. 649-655 ◽  
Author(s):  
Husam Faiz Haddad ◽  
Azhagapillai Prabhu ◽  
Ahmed Al Shoaibi ◽  
Chandrasekar Srinivasakannan
Keyword(s):  
Adsorption Capacity ◽  
Surface Area ◽  
Functional Groups ◽  
Activated Carbons ◽  
Chemical Properties ◽  
Bet Surface Area ◽  
Kinetics Of Adsorption ◽  
Physico Chemical ◽  
Benzene Toluene ◽  
Kinetics Of

The adsorption of benzene, toluene and xylene (BTX) was investigated covering different types of commercially available activated carbons with varied surface area and surface functional groups. The physico-chemical properties were characterized by Brunauer–Emmett–Teller (BET) surface area analysis, Fourier transform infrared (FTIR) spectroscopy and the Boehm titration method. Experiments to assess the adsorption isotherms and kinetics of adsorption were performed and the results are presented. An increase in the surface acid functional groups was found to decrease the adsorption capacity, with the highest adsorption capacity corresponding to carbon with lowest acid functionality.

scholarly journals Ni(II) and Cd(II) Simple and Competitive Adsorption on Activated Carbon Oxidized. Influence of the Oxidant Agents HO and NaClO

2015 ◽  
Vol 9 (1) ◽  
pp. 20-27
Author(s):  
Miguel A. Sánchez ◽  
Paola Rodríguez-Estupiñan ◽  
Liliana Giraldo ◽  
Juan Carlos Moreno-Piraján
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Adsorption Isotherms ◽  
Competitive Adsorption ◽  
Gas Adsorption ◽  
Activated Carbons ◽  
Bet Surface Area ◽  
Textural Parameters ◽  
Chemical Groups ◽  
Langmuir And Freundlich Models

In this study, granular activated carbon, GAC, was modified by oxidation with HO and NaClO aqueous solutions and heat treatment at 900°C. The N adsorption isotherms at − 196°C and SEM and FTIR results were used to characterize the properties of the prepared ACs. Textural parameters such as BET surface area and pore volumes were assessed by gas adsorption. The BET surface area values of solids were between 687 and 876 m2g-1. Additionally, immersion enthalpies of activated carbons in benzene, water, hydrochloric acid and sodium hydroxide solutions and Ni(II) and Cd(II) solutions of 500 mgL were determined, with values between 32 and 145 Jg-1. Ni(II) and Cd(II) adsorption isotherms were determined at pH 6 on activated carbons and competitive adsorption tests were realized between the two ions. The results show that in the tests carried out, the adsorption capacity decreased when the content of chemical groups on the surface also decreased. Finally, the experimental results of adsorption from the solution were adjusted to the Langmuir and Freundlich models and the first model was found to be better. With maximum adsorption capacities, the values for Ni(II) were between 3.99 and 64.9 mgg-1 and for Cd(II) were between 2.61 and 55.2 mgg-1. The values of the competitive adsorption ions present in the solution, Ni(II) and Cd(II), in the activated carbons, decreased compared to those obtained in the simple adsorption, indicating the effect of the an ion competitive presence in adsorption another.

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