SAMPLING SITES

ASSOCIATIONS (Hydrophytes)

INITIAL CONCENTRATIÓN NO₃ (mg/L)

FINAL CONCENTRACION NO₃(mg/L)

REMOVAL EFFICIENCY (%)

C.V. %

1

Lemna—Ceratophyllum

2.2

1.3

38

Berula—Lemna

2.2

1.8

17

38.3

Polygonum—Hydrocotyle

2.2

1.0

54

Polygonum—Azolla

2.2

0.7

68

2

Lemna—Ceratophyllum

9.4

1.2

87

Berula—Lemna

9.4

0.2

98

86.2

Polygonum—Hydrocotyle

9.4

3.5

63

Polygonum—Azolla

9.4

1.6

83

3

Lemna—Ceratophyllum

14.5

1.4

90

Berula—Lemna

14.5

0.9

94

Polygonum—Hydrocotyle

14.5

1.4

90

34.5

Polygonum—Azolla

14.5

0.6

96

4

Lemna—Ceratophyllum

5.5

2.6

53

Berula—Lemna

5.5

1.2

78

Polygonum—Hydrocotyle

5.5

1.1

80

62.0

Polygonum—Azolla

5.5

0.6

89

5

Lemna—Ceratophyllum

24.5

2.1

91

Berula—Lemna

24.5

0.4

98

103.5

Polygonum—Hydrocotyle

24.5

8.5

65

Polygonum—Azolla

24.5

2.6

89