1. School of Science, RMIT University, Melbourne, Victoria, Australia
2. innovative Resources and Waste Technologies (iRWT), School of Engineering, RMIT University, Melbourne, Victoria, Australia
3. Sustainable Environment Research Centre (SERC), University of South Wales, Llantwit Road, Treforest, Pontypridd, Rhondda Cynon Taff, Wales, CF37 1DL, UK