TY - JOUR
T1 - A thermodynamic approach to assess organic solute adsorption onto activated carbon in water
AU - De Ridder, David J.
AU - Verliefde, Arne R. D.
AU - Heijman, Bas G J
AU - Gelin, Simon
AU - Pereira, Manuel Fernando Ribeiro
AU - Rocha, Raquel P.
AU - Figueiredo, José Luís M
AU - Amy, Gary L.
AU - Van Dijk, Hans C.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors wish to express their gratitude to Ellen Meijvogel (Delft University of Technology) for her support with the contact angle measurements. This research was partially financed by VEWIN, the association of drinking water companies in the Netherlands, and by FCT and FEDER under Program COMPETE, project FCOMP-01-0124-FEDER-022706 (Ref. FCT Pest-C/EQB/LA0020/2011).
PY - 2012/8
Y1 - 2012/8
N2 - In this paper, the hydrophobicity of 13 activated carbons is determined by various methods; water vapour adsorption, immersion calorimetry, and contact angle measurements. The quantity and type of oxygen-containing groups on the activated carbon were measured and related to the methods used to measure hydrophobicity. It was found that the water-activated carbon adsorption strength (based on immersion calorimetry, contact angles) depended on both type and quantity of oxygen-containing groups, while water vapour adsorption depended only on their quantity. Activated carbon hydrophobicity measurements alone could not be related to 1-hexanol and 1,3-dichloropropene adsorption. However, a relationship was found between work of adhesion and adsorption of these solutes. The work of adhesion depends not only on activated carbon-water interaction (carbon hydrophobicity), but also on solute-water (solute hydrophobicity) and activated carbon-solute interactions. Our research shows that the work of adhesion can explain solute adsorption and includes the effect of hydrogen bond formation between solute and activated carbon. © 2012 Elsevier Ltd. All rights reserved.
AB - In this paper, the hydrophobicity of 13 activated carbons is determined by various methods; water vapour adsorption, immersion calorimetry, and contact angle measurements. The quantity and type of oxygen-containing groups on the activated carbon were measured and related to the methods used to measure hydrophobicity. It was found that the water-activated carbon adsorption strength (based on immersion calorimetry, contact angles) depended on both type and quantity of oxygen-containing groups, while water vapour adsorption depended only on their quantity. Activated carbon hydrophobicity measurements alone could not be related to 1-hexanol and 1,3-dichloropropene adsorption. However, a relationship was found between work of adhesion and adsorption of these solutes. The work of adhesion depends not only on activated carbon-water interaction (carbon hydrophobicity), but also on solute-water (solute hydrophobicity) and activated carbon-solute interactions. Our research shows that the work of adhesion can explain solute adsorption and includes the effect of hydrogen bond formation between solute and activated carbon. © 2012 Elsevier Ltd. All rights reserved.
UR - http://hdl.handle.net/10754/562254
UR - https://linkinghub.elsevier.com/retrieve/pii/S0008622312003144
UR - http://www.scopus.com/inward/record.url?scp=84861650971&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2012.03.052
DO - 10.1016/j.carbon.2012.03.052
M3 - Article
SN - 0008-6223
VL - 50
SP - 3774
EP - 3781
JO - Carbon
JF - Carbon
IS - 10
ER -