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

Nabil N Al- Hashimi, Steve Coupe, Amjad H. El-Sheikh, Alan P Newman

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
76 Downloads (Pure)

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 languageEnglish
Pages (from-to)192-206
Number of pages15
JournalWater Cycle
Volume4
Early online date20 Oct 2023
DOIs
Publication statusE-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 CC
BY-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

Fingerprint

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.

Cite this