1. Geomicrobiology Group, School of Life Sciences, University of Dundee Dundee DD1 5EH Scotland UK
2. Trace Element Speciation Laboratory (TESLA), Department of Chemistry King's College, Meston Walk, University of Aberdeen Aberdeen AB24 3UE Scotland UK
3. School of Science and Engineering, University of Dundee Dundee DD1 4HN Scotland UK
4. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences Urumqi 830011 China
5. Department of Geology and Petroleum Geology King's College, Meston Walk, University of Aberdeen AB24 3UE Aberdeen, Scotland UK
6. Concrete Technology Group, Department of Civil Engineering University of Dundee Dundee, Scotland UK
7. State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Oil and Gas Pollution Control College of Chemical Engineering and Environment, China University of Petroleum 18 Fuxue Road, Changping District, 18 Fuxue Road, Changping District, Beijing 102249 China