International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Full Length Research Paper

Toxicity evaluation for low concentration of chlorophenols under solar radiation using zinc oxide (ZnO) nanoparticles

Muneer M. Ba-Abbad1, Abdul Amir H. Kadhum1, Ahmed A. Al-Amiery1,2*, Abu Bakar Mohamad1 and Mohd S. Takriff1      
1Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, 43600, Selangor, Malaysia. 2Biotechnology Division, Applied Science Department, University of Technology, Baghdad 10066, Iraq.  
Email: [email protected]

  •  Accepted: 12 December 2011
  •  Published: 02 January 2012


Photo catalytic degradation of chlorophenols in aqueous solution by ZnO nanoparticles under sunlight was investigated. The toxicity of chlorophenols was evaluated by agar plates technique with paper discs in the presence of Escherichia coli. The relative toxicity data of chlorophenols, before and after degradation, was used in comparing between them. The degree of toxicity was estimated by clear zone around each paper disc of chlorophenols. Results show toxicity of chlorophenols as PCP>TeCP>2,4,6-TCP>2,4-DCP>2-CP before photocatalytic degradation. After degradation, no more toxicity was observed by clear zone around each paper disc. The toxicity test indicates that higher degradation of chlorophenols occurred by ZnO nanoparticles under sunlight as alternative method for treatment.


Key words: Chlorophenoles, degradation, toxicity, zinc oxide (ZnO) nanoparticles.