Abstract:
The present study investigated the concentration of heavy metals (lead (Pb), cadmium (Cd),
chromium (Cr), copper (Cu), zinc (Zn), and iron (Fe) in water, sediments, Chrysichthys
nigrodigitatus and Macrobrachium macrobrachion from Badagry Creek and Ologe Lagoon,
between June and November, 2016. Water, sediment, 90 C. nigrodigitatus and 110 M.
macrobrachion were collected and digested using standard method. Fe (178.97+_15.48mgL-1
) and
Zn (299.63±152.17mgL-1
) concentrations in water of Ologe Lagoon was higher (p<0.05) than
that recorded in Badagry Creek (138.16+_39.49 mgL-1, 295.71+_9.33 mgL-1
). Cd concentration in
sediment from Badagry Creek (7.96+_4.45µgg-1
) was significantly (p<0.05) higher than that from
Ologe Lagoon (5.98±2.48 ugg-1
).Cu, Zn and Fe (7.94+_2.58µgg-1
,1543.78±315.04 ugg-1 and
6992.70±3905.63 ugg-1
) respectively in the sediment from Ologe Lagoon were significantly
higher than values (4.75+_1.28 ugg-1
, 738.29±87.89 µgg-1 and 5330.40+_954.31 ugg-1
) recorded in
sediment from Badagry Creek. The Zn and Fe content respectively in M. macrobrachion from
Ologe Lagoon (42.19±6.02 ugg-1
, 48.77+_24.69µg g-1
) was higher (p<0.05) than that from
Badagry Creek (21.18±14.28 ugg-1
, 38.74+_29.09µgg-1
) while the concentration of Fe in C.
nigrodigitatus from Badagry Creek (32.61+_13.41µg g-1
) was higher than that from Ologe
Lagoon (25.54+_12.14 ug g-1
). The Cu, Zn, Fe and Cr in the water column, and Zn and Fe in
sediment, C. nigrodigitatus and M. macrobrachion from Ologe Lagoon and Badagry Creek exceeded WHO permissible limits. The results indicated that both water bodies are contaminated
with heavy metals although more prominent in Ologe Lagoon. Therefore, indiscriminate
discharging of untreated effluents into Badagry creek and Ologe Lagoon should be cautioned. |
