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Abstract
The work reported here compared between two photocatalytic degradation strategies of 2-chlorophenol (2-CP). The first strategy utilized titanium dioxide (TiO 2) immobilized on activated carbons (AC) to produce TiO 2/AC photocatalysts of various TiO 2 loadings. Various immobilization techniques were used: chemical vapour deposition (CVD), direct air hydrolysis (DAH), high-temperature impregnation (HTI). In the first strategy, characterization, adsorption and photocatalytic degradation of 2-CP using TiO 2/AC revealed that: 1) deposition of anatase TiO 2 occurred in the micro pores of AC; 2) adsorption capacity decreased with increasing anatase TiO 2 loading on TiO 2/AC; 3) adsorption kinetics followed pseudo first order kinetics where 40 % of 2-CP was adsorbed; 4) photocatalytic degradation caused removal of all 2-CP and 80 % of total organic carbon (TOC), while no chloride ion (Cl −) was produced. In the second strategy, naked TiO 2 (anatase) and mixtures of (anatase and AC) were involved to investigate the effect of presence of AC on degradation ability of anatase TiO 2 towards 2-CP. The results showed that: 1) naked TiO 2 (anatase) caused better degradation of 2-CP than TiO 2/AC (Cl − was liberated; complete degradation of 2-CP occurred; some TOC remained in the suspension); 2) presence of AC with anatase TiO 2 in the reaction mixture negatively affected Cl − production, but positively affected 2-CP and TOC disappearance; 3) when all 2-CP was adsorbed on AC, production of Cl − was inhibited but continued at a reduced rate. This might indicat that both dissolved and adsorbed 2-CP contributed to the degradation process.
Original language | English |
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Pages (from-to) | 192-206 |
Number of pages | 15 |
Journal | Water Cycle |
Volume | 4 |
Early online date | 20 Oct 2023 |
DOIs | |
Publication status | E-pub ahead of print - 20 Oct 2023 |
Bibliographical note
© 2023 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CCBY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords
- Activated carbon
- Adsorption
- Anatase
- Photocatalysis
- Titanium dioxide
ASJC Scopus subject areas
- Water Science and Technology
- Engineering (miscellaneous)
- Environmental Engineering
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Dive into the research topics of 'Adsorption and photocatalytic degradation of 2-chlorophenol in water: Evaluating the performance of TiO2/activated carbon vs. using a mixture of TiO2 and activated carbon'. Together they form a unique fingerprint.Projects
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Development of low cost adsorbents derived from waste materials
Newman, A. P., El-Sheikh, A. H. & Hollyoak, B.
2/09/02 → …
Project: Unfunded project
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