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. School of Metallurgy and Environment, Central South University, Changsha, People’s Republic of China
5. Department of Environmental Science, International Islamic University Islamabad, Islamabad, Pakistan