/sci/ - Science & Math

>>8755206
>>8755225
OP here, oceanography grad student.

The study I posted is just one of the few studies in the last 5 years or so finally putting the nail in the coffin. Pic related is the synthesis of various studies from various spot taken from a synthesis paper
http://onlinelibrary.wiley.com/doi/10.1029/2004JC002601/abstract

The take home point is that on average, per mol Fe added only 5620 mol C get sequestered (DIC/Fe efficiency). The authors and general scientific consensus argue that at this amount, the price is not economically feasible.

1. External cost. First to mine iron in itself takes quite a bit of C emission. Then you need to make the iron bio-available, so Fe(s) would not suffice, you need to dump it in form of say biofixable compound, the most common one being Fe(III)SO4.7HSO so you need to chemically process the iron and this process also has C emission associated with it.

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