1. Department of Chemistry; Universiti Teknologi Malaysia; 81310 Skudai Johor Malaysia
2. Department of Chemistry, Faculty of Science; Sana'a University; Sana'a Yemen
3. Department of Mathematical Sciences; Universiti Teknologi Malaysia; 81310 Skudai Johor Malaysia
4. Department of Statistics and Informatics, College of Computer Science and Mathematics; University of Mosul; Mosul Iraq
5. Department of Chemistry, College of Education; Salahaddin University; Erbil Iraq
6. Advanced Membrane Technology Centre; Universiti Teknologi Malaysia; 81310 UTM Skudai Johor Malaysia