1. School of Postgraduate Studies, Diponegoro University, Semarang, Indonesia
2. Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia
3. The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, Thailand
4. Center of Excellence on Energy Technology and Environment (CEE), Ministry of Higher Education, Science, Research and Innovation, Bangkok, Thailand
5. Department of Environmental Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia
6. Mining Engineering Department, Faculty of Engineering, Muhammadiyah University of Mataram, Mataram, Indonesia
7. Department of Chemistry, Faculty of Science and Mathematics, Diponegoro University, Semarang, Indonesia