期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 209, 期 -, 页码 187-195出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2015.05.013
关键词
Adsorption; Bone char; Fixed-bed columns; Naproxen; Pharmaceuticals; Water treatment
An integrated analysis of naproxen adsorption on bone char in batch and packed-bed column conditions has been performed. Kinetic, thermodynamic and breakthrough parameters have been calculated using adsorption models and artificial neural networks. Results show that naproxen removal using bone char in batch conditions is a feasible and effective process, which could involve electrostatic and non-electrostatic interactions depending mainly on pH conditions. However, the application of packed-bed column for naproxen adsorption on bone char is not effective for the treatment of diluted solutions due to the low degree of adsorbent utilization (below 4%) at tested operating conditions. The proposed mechanism for naproxen removal using bone char could include a complexation process via phosphate and naproxen, hydrogen bonding and the possibility of hydrophobic interactions via pi-pi electron. This study highlights the relevance of performing an integrated analysis of adsorbent effectiveness in batch and dynamic conditions to establish the best process configuration for the removal of emerging water pollutants such as pharmaceuticals. (c) 2015 Elsevier B.V. All rights reserved.
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