Abstract
Phenol is a carcinogen to humans and is a serious health concern, even at low concentrations. The efficient removal of phenol inside waste water is highly desirable. Laser induced photo-catalysis has been applied for removal of phenol from waste water using p-type NiO semiconductor catalyst for the first time. The characteristics of phenol removal using laser induced photo-catalytic process were investigated. The dependence of phenol removal on laser energy (100-250 mJ) and laser irradiation time (0-60 min) was studied. The rate of phenol removal process was characterized using UV absorption spectrometry, Raman spectroscopy and gas chromatography. In addition, the role of pH changes during the removal process was also investigated. Laser induced photo-catalytic process is highly efficient in removal of phenol in water over a short period of time (in minutes) as compared to conventional methods using lamps (hours). The phenol removal process pursued the first order kinetics with decay constant = 0.0125 min-1.
| Original language | English |
|---|---|
| Pages (from-to) | 83-89 |
| Number of pages | 7 |
| Journal | Journal of Hazardous Materials |
| Volume | 155 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - 30 Jun 2008 |
Bibliographical note
Funding Information:The support by King Fahd University of Petroleum and Minerals under under SABIC Project # SB070004 is gratefully acknowledged.
Keywords
- Laser applications
- NiO
- Organic pollutants
- Oxidation
- Phenol removal
- Photo-catalysis
- Reaction kinetics
- TiO
- Waste water treatment
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis
