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Parameters studied Different study stations at Chandilli Paper mill effluent

contaminated area near river Nagavalli.
Station-1 (S1) Station-2 (S2) Station-3 (S3)

Colour Pale- yellowish Pale yellow Light yellow

brown
Odour Pungent, strong Filthy smell, little Filthy smell.

H S smell pungent
2
Temperature, ºC 26.8 ± 2.1 24.6 ± 1.6 22.8 ± 0.8

pH 7.8 ± 0.6 8.1 ± 0.4 8.2 ± 0.4

Conductivity, mho/cm 1694.7±17.5 1002.4±31.6 674.2±18.8
-1
DO (mg.L ) 2.1 ± 0.8 3.3 ± 0.3 4.6 ± 1.1
BOD (mg.L ) 108.3 ±11.3 46.8 ± 7.5 26.1 ± 2.8
-1
COD (mg.L ) 276.4 ± 12.5 86.2 ± 9.3 81.4 ±8.5
-1
TSS (mg.L ) 819.3 ± 19.6 311.3 ±14.5 118.2±12.4
-1
-1
TDS (mg.L ) 1387.9±22.7 384.8 ± 22.9 185.2±8.8
Chlorides, (mg.L ) 311.5 ±14.2 91.4 ± 16.8 71.4 ±14.3
-1
Hardness (mg.L ) 514.2 ±21.6 295.5±19.7 174.5± 5.6
-1
Fluoride (as F) 1.89 ± 0.8 ND ND

-1
Total Nitrogen (mg.L ) 2.26 ± 0.5 3.16 ± 1.2 2.88 ± 0.92
-1
Total Phospahtes (mg.L ) 1.26 ± 0.3 2.85±0.71 2.18±0.38
Total Sulphate (mg.L ) 132.1±9.8 75.8 ± 6.9 31.5 ± 6.1
-1
-1
Sodium (mg.L ) 61.8 ± 5.2 26.5 ± 2.8 24.1 ± 2.7
-1
Potassium (mg.L ) 49.5 ± 3.8 14.7 ± 4.7 15.2 ± 1.8
Mercury [Hg] (mg.L ) 0.46±0.07 0.19±0.03 0.08±0.03
-1
Cadmium [Cd] (mg.L ) 0.32±0.05 0.15 ± 0.02 0.07±0.01
-1
Lead (as Pb) ND ND ND

Table-2: Showing the changes in pigment content of algae and crop plants collected from the

Paper mill leached effluent contaminated area along with residual mercury and cadmium

accumulation data. Values in parentheses indicated percent decrease in parameters, when
compared to its respective control values. [UC=Uncontaminated (Control), C= Contaminated;

ND=Not detected].

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