Diffusion of hydrophilic organic micropollutants in granular activated carbon with different pore sizes

WATER RESEARCH

卷:162

Article

Piai, Laura¹  Dykstra, Jouke E.¹  Adishakti, Mahesa G.^1,4  Blokland, Marco²  Langenhoff, Alette A. M.¹  van der Wal, Albert^1,3 

[1] Wageningen Univ & Res, Environm Technol, POB 17, NL-6700 AA Wageningen, Netherlands

[2] Wageningen Univ & Res, Wageningen Food Safety Res, POB 230, NL-6708 WB Wageningen, Netherlands

[3] Evides Water Co, POB 4472, NL-3006 AL Rotterdam, Netherlands

[4] Environm Resources Management Indonesia, Centennial Tower, South Jakarta 15419, Indonesia

关键词: Hydrophilic micropollutants;    Activated carbon;    Adsorption kinetics;    Intra-particle diffusion;    Pore diffusion;   

DOI  :  10.1016/j.watres.2019.06.012

来源: Elsevier

【 摘 要 】

Hydrophilic organic micropollutants are commonly detected in source water used for drinking water production. Effective technologies to remove these micropollutants from water include adsorption onto granular activated carbon in fixed-bed filters. The rate-determining step in adsorption using activated carbon is usually the adsorbate diffusion inside the porous adsorbent. The presence of mesopores can facilitate diffusion, resulting in higher adsorption rates. We used two different types of granular activated carbon, with and without mesopores, to study the adsorption rate of hydrophilic micropollutants. Furthermore, equilibrium studies were performed to determine the affinity of the selected micro pollutants for the activated carbons. A pore diffusion model was applied to the kinetic data to obtain pore diffusion coefficients. We observed that the adsorption rate is influenced by the molecular size of the micropollutant as well as the granular activated carbon pore size. (C) 2019 The Authors. Published by Elsevier Ltd.

【 授权许可】

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