Denitrification rate [mg/m²/day]

Depth [cm]

Control

5 g Calcium nitrate

10 g Calcium nitrate

30 g Calcium nitrate

0 - 10

21.3

25.2

36.4

46.1

Nitrate in Pore water/NO₃-N [mg/L]

Depth [cm]

Control

5 g Calcium nitrate

10 g Calcium nitrate

30 g Calcium nitrate

0 - 10

0.58

8.53

5.62

2.67

10 - 20

0.68

0.19

7.75

1.27

Nitrate in bulk water/NO₃-N [mg/L]

Control

5 g Calcium nitrate

10 g Calcium nitrate

30 g Calcium nitrate

0.6

4.2

6.1

18.2

Acid-volatile sulfide (AVS) [%]

Depth [cm]

Control

5 g Calcium nitrate

10 g Calcium nitrate

30 g Calcium nitrate

0 - 10

0.00002

N.D.

N.D.

N.D.

10 - 20

0.004

0.0006

N.D.

N.D.