Year

No. flow events

Through-flow

L

Dissolved P

Total P

Nitrate-N

Ammonium-N

Total N

mg∙L⁻¹

Red mud –Tray 1

2013

24

2,41

0.565a†

0.735a

23.54a

7.03a

35.26a

2014

14

2338

0.630a

0.747a

24.01a

1.27a

29.21ab

2015

24

3565

0.435a

0.534a

16.03b

3.01a

24.11b

2016

8

961

0.537a

0.688a

14.97b

5.23a

25.17ab

Red mud –Tray 3

2013

24

2347

0.586a

0.727a

16.06a

5.07a

26.70a

2014

14

1595

0.506a

0.738a

25.35a

1.03a

29.33a

2015

24

3624

0.403a

0.534a

14.25a

7.20a

26.11a

2016

8

941

0.468a

0.561a

13.13a

7.50a

22.16a

Water treatment residual –Tray 2

2013

24

2346

0.852a

1.001a

49.00a

34.66a

87.25a

2014

14

1773

1.010a

1.368a

51.46a

33.40a

96.32a

2015

24

4275

1.052a

1.230a

43.72a

15.00a

65.35a

2016

8

921

1.259a

1.398a

38.32a

35.59a

88.98a

Water treatment residual –Tray 4

2013

24

2601

0.820a

0.987a

44.87a

39.60a

91.13a

2014

14

2119

1.012a

1.190a

71.47a

17.59b

98.44a

2015

24

4127

1.137a

1.300a

54.06a

33.99a

95.94a

2016

8

1120

1.506a

1.634a

49.05a

40.66a

104.86a

Four-year total through-flow and average concentration ‡

Red mud tray 1

9605a

0.530b

0.663b

20.08c

4.30b

29.07c

Red mud tray 3

8506a

0.494b

0.644b

16.96c

5.27b

26.51c

Water trt. tray 2

9315a

0.998a

1.198a

46.46b

27.77a

81.75b

Water trt. tray 4

9937a

1.046a

1.209a

53.82a

33.40a

95.81a