1
Master Programme Graduate School of Mathematics and Natural Sciences, Sriwijaya University, Jl. Padang Selasa No. 524 Ilir Barat 1, Palembang-South Sumatra, Indonesia
2
Graduate School of Mathematics and Natural Sciences, Sriwijaya University, Jl. Padang Selasa No. 524 Ilir Barat 1, Palembang-South Sumatra, Indonesia
3
Departement of Environmental Engineering, Faculty of Mathematics and Natural Sciences, Insitut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Hui, Jati Agung, Lampung 35365, Indonesia
4
Research Center of Inorganic Materials and Coordination Complexes, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Jl. Palembang Prabumulih Km.32 Ogan Ilir 30662, Indonesia
5
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jl. Palembang-Prabumulih, Km. 32, Ogan Ilir, South Sumatra, Indonesia
6
Department of Physics, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jl. Palembang-Prabumulih, Km. 32, Ogan Ilir, South Sumatra, Indonesia