Hasintha Wijesekara1, Nanthi S Bolan2, Kim Colyvas3, Paul Rippon3, Balaji Seshadri2, Ramesh Thangavel4, Yong Sik Ok5, Yasser M Awad5, Aravind Surapaneni6, Christopher Saint7, Guanglong Tian8, Silvana Torri9 and Meththika Vithanage10, (1)Newcastle University, Callaghan, AUSTRALIA, (2)Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, Australia, (3)School of Mathematical and Physical Sciences, Faculty of Science, The University of Newcastle, Callaghan, Australia, (4)Research Complex for North Eastern Hill Region, Division of Natural Resource Management, Indian Council of Agricultural Research (ICAR), Meghalaya, India, (5)Korea Biochar Research Centre, Kangwon National University, Chuncheon, Korea, Republic of (South), (6)South East Water, Heatherton, Australia, (7)Natural & Built Environments Research Centre (NBERC), University of South Australia, Adelaide, Australia, (8)Metropolitan Water Reclamation District of Greater Chicago, Chicago, IL, (9)Department of Natural Resources and Environment, School of Agriculture, University of Buenos Aires, Buenos Aires, Argentina, (10)National Institute of Fundamental Studies, Kandy, Sri Lanka