1. Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, JAPAN
2. Department of Chemistry, Jashore University of Science and Technology, Jashore-7408, BANGLADESH
3. Institute of Integrated Science and Technology, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, JAPAN
4. Environmental Laboratory, Asia Arsenic Network, Arsenic Center, Benapole Road, Krishnobati, Pulerhat, Jashore-7400, BANGLADESH
5. Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka-1000, BANGLADESH
6. Division of Water Resources Engineering & Centre for Advanced Middle Eastern Studies, Lund University, Box 118, SE-221 00 Lund, SWEDEN