1. Research Group on Magnetic Materials, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Ogan Ilir 30662, Indonesia
2. Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Ogan Ilir 30662, Indonesia
3. Doctoral Program of Environmental Science, Graduate School, Universitas Sriwijaya, Palembang 30139, Indonesia