Table 2.

Overview of the discussed in situ tests performed for the BN experiment

Test code	Interval	${\text{NO}}_3^{-}$	${\text{NO}}_2^{-}$	CH3COO−	H2 (dissolved)	Start date	Time of e− donor pulse	Sterility solution injected	Parallel injection of tracers
INT1_2011	1	1.5	–	–	–	2011-03-16	No pulse injection	Not sterile	Br− and 2H–H2O
INT1_2014	1	15	–	–	2.3	2014-10-01	54 days	Sterile	–
INT1_2015	1	15	–	–	1.6	2015-09-23	48 days	Sterile	Br−
INT2_2011a	2	1.1	0.8	0.8	–	2011-03-16	No pulse injection	Not sterile	Br− and 2H–H2O
INT2_2011b	2	1.1	–	0.3	–	2011-05-31	No pulse injection	Sterile	–
INT2_2013	2	25	–	4	–	2013-11-05	70 days	Sterile	–

The indicated concentrations (in mM) of nitrate, nitrite, acetate and dissolved H₂ are the final concentrations after injection and dilution in the interval