Table 1

H2O2 Measurements*
Pyrite loading (g/L)a
 H2O2(μM)
20 g/L with 1 mM EDTA
 2.19
40 g/L with 1 mM EDTA
 6.54
80 g/L with 10 mM EDTA
 11.7
160 g/L with 10 mM EDTA
 25.6
no EDTA added to any above
 not detected
with EDTA and addition of catalaseb
 not detected
Solution composition
 H2O2(μM)
10 μM H2O2 solution no pyrite
 10
with 10 μM Fe(II)
 4.2
with 1 mM EDTA
 10.1
with Fe(II) and EDTA
 10.1

*Experiments were performed in the presence of oxygen. aPyrite of varying particle loadings were suspended in EDTA, quickly filtered and analysed.

b127,000 units catalase/4 mL.

Cohn et al. Geochemical Transactions 2006 7:3   doi:10.1186/1467-4866-7-3