Chemical speciation of trace metals in sediment and their bioaccumulation in fish species of
three urban rivers around Dhaka City, Bangladesh
Md Saiful Islam, Md Kawser Ahmed, Mohammad Raknuzzaman, Md Habibullah-Al-Mamun and Shigeki
Masunaga
Table S1 Basic information of sampling sites
Site
ID
Name of the site
Possible pollution source
T1
Tongi bazar
Cotton mill, brick field, hatcheries, dumping sites for garments waste, pharmaceutical industries observed.
T2
Ashulia
Textiles, cotton mills, garbage dumping, pharmaceutical industries located to this site.
T3
Gabtoli bridze
This site is traffic junction, chemical incineration, burning and dumping of industrial effluents, brick fields
located to this site.
B1
Basila
The main leather tanning zone, about 270 tanneries on an area of 4 km2, industrial waste dumping, dyeing
industries observed
B2
Kamrangirchar
Urban waste dumping and burning, lead smelting factory, electroplating and city waste sewerage line also
connected near this site.
B3
Buriganga
Bridge
It is one of the major industrial location of Dhaka city with units of metals processing, global heavy
chemicals Ltd., distillery, paper, textile, glass, electroplating, chemical, plastic, engineering, battery making
etc.
S1
Rupgang
Agriculture field, oil factory, jute mills, cement factory and ship making factory also located to this sampling
site.
S2
Demra bridze
Waste dispose channel, jute mill, cement factory, glass factory, oil mill observed at this site.
S3
Shidhirgang
It is downstream site of Kachpur industrial area and located near Shidhirgang power station. Waste burning,
cement, textiles, spinning, paper and jute mills located to this site.
Table S2 Measured and certified values of heavy metal concentration, as mg/kg dry weight, in
standard reference material of NMIJ CRM 7303-a lake sediment and DORM-2 – dogfish muscle
NMIJ CRM 7303-a lake sediment
DORM-2 – dogfish muscle
Certified
value
Measured
value (n=3)
Recovery
(%)
Certified
value
Measured
value (n=3)
Cr
39.1±2.8
39.2±0.2
100
34.7±5.5
33.9±2.2
Ni
21.8±2.5
21.6±0.4
99
19.4±3.1
19.1±1.1
Cu
23.1±3.1
23.3±0.6
101
2.34±0.16
2.52±0.10
As
8.6±1.0
8.5±0.1
99
18±1.1
17.7±1.6
Cd
0.342±0.017
0.341±0.010
100
0.043 ± 0.008
0.044±0.004
Pb
31.3±1.1
31.7±0.3
101
0.065 ± 0.007
0.068±0.005
Metal
Reco
very
(%)
98
98
108
98
102
105