Removal of 4-chlorophenol by visible-light photocatalysis using ammonium iron(II) sulfate-doped nano-titania

Finella Jianna A. Villaluz, Mark Daniel G. de Luna, James I. Colades, Sergio GARCIA SEGURA, Ming Chun Lu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Halogenated aromatic compounds are toxic and carcinogenic. This is the case of 4-chlorophenol (4-CP), a priority pollutant found in large amounts in industrial wastewater effluents from pharmaceutical, dye, pulp and paper industries. Long term exposure to 4-CP even at low-concentration is associated to endocrine disruption. Photocatalysis is a promising advanced oxidation process that attains complete degradation of organic pollutants. The use of UV lamps undermines actual photocatalysis application due to the electrical energy requirements. In this frame, the development of visible light photoactive catalysts can overcome these challenges allowing the implementation using affordable light sources like light emitting diodes (LEDs) or natural sunlight. This work is to present the synthesis and use of an alternative photocatalyst that provided eight-fold increase on 4-CP degradation in comparison to commercial TiO 2 Degussa P-25. Almost complete removal (99.20%) was achieved with synthesized Fe/N/S-doped TiO 2 at 1.0 g L −1 of photocatalyst dose and pH 7.0 for treating 10 ppm of 4-CP.The first-order rate constant, k LH , and Langmuir adsorption constant, K LH , were calculated with values of 0.429 min −1 and 2.326 ppm −1 , respectively. The Fe/N/S-TiO 2 . photocatalysts showed an excellent stability maintaining their performance during four cycles of recovery/reuse.

Original languageEnglish (US)
Pages (from-to)121-128
Number of pages8
JournalProcess Safety and Environmental Protection
Volume125
DOIs
StatePublished - May 1 2019

Fingerprint

Photocatalysis
chlorophenol
Photocatalysts
Ammonium Compounds
titanium
Sulfates
ammonium
Iron
Titanium
sulfate
iron
Ultraviolet lamps
Degradation
Paper and pulp industry
Aromatic compounds
Organic pollutants
Drug products
pulp and paper industry
degradation
Light emitting diodes

Keywords

  • Advanced oxidation process
  • Nanotechnology
  • Persistent organic pollutants
  • Visible light photocatalyst
  • Wastewater treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Safety, Risk, Reliability and Quality

Cite this

Removal of 4-chlorophenol by visible-light photocatalysis using ammonium iron(II) sulfate-doped nano-titania. / Villaluz, Finella Jianna A.; de Luna, Mark Daniel G.; Colades, James I.; GARCIA SEGURA, Sergio; Lu, Ming Chun.

In: Process Safety and Environmental Protection, Vol. 125, 01.05.2019, p. 121-128.

Research output: Contribution to journalArticle

Villaluz, Finella Jianna A. ; de Luna, Mark Daniel G. ; Colades, James I. ; GARCIA SEGURA, Sergio ; Lu, Ming Chun. / Removal of 4-chlorophenol by visible-light photocatalysis using ammonium iron(II) sulfate-doped nano-titania. In: Process Safety and Environmental Protection. 2019 ; Vol. 125. pp. 121-128.
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