1. Department of Materials Science and Engineering; Indian Institute of Technology Kanpur; Kanpur 208016 India
2. Department of Biological Sciences and Bioengineering; Indian Institute of Technology Kanpur; Kanpur 208016 India
3. Centre for Environmental Science & Engineering; Indian Institute of Technology Kanpur; Kanpur 208016 India
4. Electro Membrane Processes Division; CSIR-Central Salt and Marine Chemicals Research Institute; Bhavnagar 364021 India