1. Postgraduate Institute of Science; University of Peradeniya; Sri Lanka
2. Department of Chemistry, Faculty of Science; University of Peradeniya; Sri Lanka
3. Department of Chemical and Process Engineering, Faculty of Engineering; University of Peradeniya; Sri Lanka
4. Department of Geology, Faculty of Science; University of Peradeniya; Sri Lanka
5. Department of Chemistry; Loughborough University; Loughborough LE11 3TU U.K.