1. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
2. Department of Chemical Engineering, Indian Institute of Technology Tirupati, Chindepalle, Andhra Pradesh 517619, India
3. Membrane Science and Separation Technology Division, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat 364002, India