1. Department
of Chemistry, University of Kalyani, Nadia 741 235, West Bengal, India
2. Department
of Chemistry, University of Girona, Campus Montilivi, 17071 Girona, Spain
3. KTH-International Groundwater
Arsenic Research Group, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
4. Department
of Environmental Health Sciences, School of Public Health, University of Michigan, 109 Observatory Street, Ann
Arbor, Michigan 48109-2029, United States
5. DNGM Research Foundation, 37C Block B, New Alipore, Kolkata 700053, India
6. AMPHOS 21 Consulting S.L., Passeig de Garcia i Faria 49-51, 08034 Barcelona, Spain