International Journal of Marine Science, 2017, Vol.7, No.16, 141-160
151
Figure 2 Types and number of industries close to the Karnafully River
Note: Source: Sarwar et al. (2010)
3.3 Major pollutants
SO
2
, CO
2
, NO
3
, H
2
S and lignin vapor from tanning industries; Na
2
SO
4
, NaOH, CaCO
3
, Ca(OH), Hg, Na
2
CO
3
,
Na
2
SO
3
, H
2
SO
4
, HCl etc. from pulp and paper industries; Cr, Ni, Cd textile industries; NH
3
, NO
2
, SO
2
, H
2
SO
4
,
Sulphur dust, rock dust and COD from fertilizer industries; Lime components, silica, alumina iron from cement
industries; DDT, Caustic soda, HCl, H
2
SO
4,
bleaching powder, acids, alkalis, ammonia, chlorine and suspended
solid from chemical industries; waste water containing high level of BOD, COD, Phenol, Cyanides and very low
value of DO from iron, steel and metal industries; crude oil from oil refinery; baling, jute fibre and dust from jute
industries; minerals, organic acids, alkalis, ammonia, suspended solids and various chemicals from
pharmaceutical industries; acids, solvents, cyanides, chlorophenolic components, lead, copper, arsenic, suspended
solids etc. from pesticides and herbicide manufacturing industries; Zn, Cd and grease from rubber and plastic
industries; pigments, resins, solvent, Pb, Sal, Cr, Cd, and Zn from paint manufacturing industries are major
pollutants of the Karnafully water pollution (Ahmed et al., 2002). According to Chowdhury (1994) caustic soda,
lime stone, lime, salt cake, resin size, china clay, alum, sodium sulphate, sodium sulphide, chlorine gas, calcium
hydrochloride, hydrochloride, sulphuric acid and sodium hexameta phosphate are major chemicals used in KPM
and KPRC industries.
3.4 Types of pollutants
3.4.1 Organochlorine pesticides
Seasonal variation in organochlorine pesticides was estimated in the Karnafully River (Table 13).
Table 13 Seasonal variation in Organochlorine pesticides
Name
Lindane (ng/mL) Aldrin (ng/mL)
Heptachlor
(ng/mL)
P,P’DDT (ng/mL)
P,P’DDE
(ng/mL)
P,P’TDE(DDD)
(ng/mL)
Surface Water
0.321-0.023
0.020-0.010
2.291-0.053
1.851-0.340
1.18-.005
1.421-0.018
Surface Sediment 1.321-0.425
3.142-0.123
3.607-1.224
4.560-0.745
5.030-0.085
2.831-0.531
Fish Muscle
132.915-85.212
103.215-26.285 937.88-124.6 702.59-40.0
152.35-107.25 825.79-112.0
Note: Source: Mannan (2006)
3.4.2 Solid wastes
Solid and solid wastes causes serious environmental problems containing urban local government in developing
countries. Solid waste generation of the urban areas of Bangladesh is increasing proportionately with the growth
of its population that is 5.4% per annum (BBS, 1997). The highest Total Suspended Solid (TSS) was found 405
11 26
1 1 2 1 2 20 1 1 1 3 3 2 2 4
75
156
0
20
40
60
80
100
120
140
160
180
NUMBER
INDUSTRIES
