1. Department of Chemistry, University of Okara, Okara, Pakistan
2. Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
3. Department of Chemistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
4. Department of Botany, Hazara University, Hazara, Pakistan
5. School of Metallurgy and Environment, Central South University, Changsha, P.R. China
6. Department of Environmental Sciences, Faculty of Life Sciences, University of Okara, Okara, Pakistan