Dear David Just a short to note to say thanks you for replying so quickly and comprehensively. I'll carry out your comments as suggested. A couple of answers: Yes, flow rate is slow and the the experimental data was collected over five years, but I've run the model for much longer than that to allow Solution 0 to flush through the system to reach a state of no further mineralogical and pH changes. (The experimental data suggests this over the five year timescale, so we've yet to get the timings correct, but this is a good place to start.) Yes, we have been thinking about the redox conditions and I've run one calc with no Fe present, and also one with fixed pE, to overcome the changing redox conditions. Thanks again for your comments. They are really useful! Best regards Fiona Hunter ~~~~~~~~~~~~~~~~~~~~~~~~~~ Dr Fiona Hunter MRSC Serco Assurance Building 150 Harwell International Business Centre, Didcot Oxfordshire OX11 0QJ Telephone: +44 (0)1635 280418 Facsimile: +44 (0)1635 280305 ~~~~~~~~~~~~~~~~~~~~~~~~~~ ****Disclaimer*********** This e-mail and any attachments may contain confidential and/or privileged material; it is for the intended addressee(s) only. If you are not a named addressee, you must not use, retain or disclose such information. Serco cannot guarantee that the e-mail or any attachments are free from viruses. The views expressed in this e-mail are those of the originator and do not necessarily represent the views of Serco. Nothing in this e-mail shall bind Serco in any contract or obligation. Serco Group plc. Registered in England and Wales. No: 2048608 Registered Office: Serco House, 16 Bartley Wood Business Park, Bartley Way, Hook, Hampshire, RG27 9UY, United Kingdom. <<<<GWIASIG 0.07>>>>
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