IJMS-2017v7n16 - page 8

International Journal of Marine Science, 2017, Vol.7, No.16, 141-160
http://ijms.biopublisher.ca
144
Continued Table 2
Parameters WHO Standard Present Study Previous Study
T.Alkalinity (mg/L) -- 5.64-121.00 32.10-84.70
T.Hardness (mg/L) 80-120 10.00-4500.00 39.50-3700.00
Chloride (mg/L) 600 2.09-13147.70 1.50-10196.84
H2S (mg/L) -- 0.00-6.39 ND
NH3-N (mg/L) 0.2-5 0.01-0.08 BDL-7.91
BOD (mg/L) 6 0.21-9.17 ND
COD (mg/L) NYS 11.39-179.87 6.00-6480.00
NO2 -N (mg/L) 0.03 0.00-5.18 BDL-0.09
NO3-N (mg/L) NYS 0.00-1.63 BDL-1.45
NO2-+ NO3--N (mg/L) - 0.54-14.60 ND
PO43--P (mg/L) 0.8 0.12-4.94 BDL-7.60
SO42—S (mg/L) - 9.26-977.08 8.50-1250.70
Zn (mg/L) - 0.01-0.04 0.02-0.45
Cu (mg/L) <0.4 0.01-0.03 0.02-4.23
Co (mg/L) - BDL BDL-0.02
Cr (mg/L) NYS BDL-0.01 0.02-0.35
Cd (mg/L) NYS BDL BDL-0.01
Pb (mg/L) 0.05 BDL-0.02 BDL-0.11
Fe (mg/L) NYS 0.06-3.24 0.01-9.35
Mn (mg/L) 0.1-1 BDL-0.92 0.02-2.59
%NaCl - 0.20-19.10 ND
Coliform/100 mL 5000 ≥1600 ND
Note: Source: Ahmed et al. (2010)
The total Biological Oxygen Demand (BOD) load was estimated at about 3.5 MT every day (Ali, 1997). Uddin
(2006) recorded the value of DO (4.9-5.21) mg/L, TDS (115-550) mg/L, BOD (1.14-2.99) mg/L, COD (10.8-32.1)
mg/L (Uddin, 2006). Akter (2012) found following values from KPM effluent (Table 3).
Table 3 Experimented value from laboratory analysis of KPM effluent
Parameters Banshghat (Control) KPM discharge point
(Experiment)
Dhobashi Bazar
(Experiment)
Average
value (2+3)
Standard
value Dry season Wet season Dry season Wet season Dry season Wet season
pH 8.19 8.10 8.90 8.98 8.66 7.52 8.51 6-9
TDS (mg/L) 80 102 520 400 210 180 327.5 2100
TSS (mg/L) 110 170 220 620 122 280 310.5 150
DO (mg/L) 4.5 4.2 0.8 0.8 3.25 3.12 1.99 4.5-8
BOD (mg/L) 10 12 24 16 18 9 16.75 50
COD (mg/L) 150 170 780 620 320 280 500 200
SO4
-2 (mg/L) 0.14 0.9 12 8.0 2.20 1.7 5.98 0.40
Cl- (mg/L) 15 17 28 23 12 14 19.25 600
NO3
-1 (mg/L) 0.9 0.3 2.8 2.8 2.2 1.2 2.25 10
Note: Source: Akter (2012)
Temperature, transparency, pH, DO, BOD and petroleum hydrocarbon concentration in water sample were found
to be ranged from 27-29°C, 14-18 cm, 7.9-9.5, 4.5-7.9 mg/L, 33.6-450.3 mg/L (Ahmed, 2006). According to
Chowdhury (2005) DO, water temperature, pH, salinity, CO2, H-CO3, alkalinity, NO2-N, PO4-P and SiO3-Si varied
seasonally. Hossain (2004) and Ahmed (2010) also conducted research on the water quality of the arnafully river
(Table 4; Table 5).