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Table 1 Solid phase characteristics for the four types of magnetite used in the experiments

From: Interactions between magnetite and humic substances: redox reactions and dissolution processes

Magnetite Fe(II)/Fe(III)a Size (nm)b Size (nm)c BET surface area (m2/g)d
Biogenic 0.40 ± 0.01 13.6 ± 2.1 11.4 53.7
13 nm 0.37 ± 0.01 13.2 ± 2.4 12.1 64.6
7 nm 0.21 ± 0.01 7.1 ± 1.2 6.6 156.3
500 nm 0.53 ± 0.03 524 ± 156 N/A 10.7
  1. aBased on ferrozine analysis of the solid phase equilibrated in bicarbonate buffer
  2. bBased on TEM analysis of bicarbonate buffered sample
  3. cBased on X-ray diffraction analysis of bicarbonate buffered sample
  4. dOn magnetite samples stored in anoxic MQ H2O