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. Author manuscript; available in PMC: 2016 Mar 6.
Published in final edited form as: Chemosphere. 2015 Oct 23;144:1106–1115. doi: 10.1016/j.chemosphere.2015.09.045

Table 1.

Summary of microcosm experimental conditions, and analyses performed on each.

Set Microcosm
Type		 Amendment on
Day 0		 Lactate on
Day 10.0?		 Number of
microcosms,
duration		 Analyses
1st Control Amendment-free no Two microcosms
each type, both
38.0 days		 pH, Eh, dissolved elemental
concentrations, As XANES, and
Fe EXAFS
Nitrate-only
Treatment		 Sodium nitrate yes
Nitrate-Fe(II)
Treatment		 Sodium nitrate &
ferrous sulfate		 yes
2nd Nitrate-Fe(II)
Treatment		 Sodium nitrate &
ferrous sulfate		 yes Two microcosms,
one for 12.5 days,
the other for 39.5
days		 pH, Eh, dissolved elemental
concentrations, dissolved organic
carbon, magnetic susceptibility,
magnetic separation, sequential
chemical extraction/digestion,
XRD, and SEM-EDS