1. Department of Chemistry, D. S. B. Campus, Kumaun University, Nainital, India
2. Natural Resource and Environmental Management Group, Central Institute of Mining and Fuel Research, Dhanbad, India
3. Department of Chemistry, School of Applied & Life Sciences, Uttaranchal University, Dehradun, India
4. Central Ground Water Board, Patna, India
5. School of Allied Sciences, Graphic Era Hill University Bhimtal Campus, Bhimtal, India