Correlations, partitioning and bioaccumulation of trace metals between different segments of Taylor Creek, southern Nigeria

Abstract

ABSTRACT:Correlations between trace metals in dissolved and particulate phases, B. bayad and sediments were investigated in five selected sites along Taylor Creek, which lies between longitude 006°17I to 006°21 I E and latitude 05°01 I to 05°05 I N. The degree of correlation between the various metals was different in each of the investigated segments. Between segments, not many significant correlations were recognized. Only Ni and Cd, Mn and Cd, Mn and Ni, and Mn and Pb are correlated in the sediments and in the particulate phase, Fe and Cr, Pb and Cd, and Zn and Ni are correlated, which suggests that the sources are not common for both compartments. Partitioning coefficients (K d ) of trace metals between dissolved and particulate phases are generally low, which is typical for fresh water ecosystems and fairly stable over Taylor Creek all through the seasons. Furthermore, the bio-concentration factors (BCF) of B. bayad were low unlike those of other natural waters. Cluster analysis showed that metal accumulation in the particulate phase differed from those observed in sediments, which also confirms that the pollution of the Creek might be from different sources.

Assessment of Metals Concentration in Water, Sediment and Macrophyte Plant Collected from Lake Hawassa, Ethiopia

“…In addition, the higher electrical conductivity observed at S 2 could be attributed to the relatively low DO concentration and revealed high negative correlation to each other (temp/DO: r= -0.771). This result is in accordance with the works of Phiri et al [21] and Okafor [22] who reported that high EC contribute for reduction of DO concentration in the given water bodies.…”

Levels of Trace Metals in surface Sediments from Kalabari Creeks, Rivers State, Nigeria

“…High concentration of copper observed in the sediment was probably due to high anthropogenic and natural processes. This is in accordance with the observation by (Hughes and Plos, 1978, Bezuidenhout et al, 1990, Seymore, 1994, Oronsaye and Ogbebo, 1995, Senthil et al, 2008, Horsfall and Spiff, 2002, Okafor and Opuene, 2006, who stated that copper mainly accumulated in sediment.…”

Accretion of heavy metals in the catfish Bagrus bayad from Taylor Creek, southern Nigeria

“…The BCF and BMF were metal-and organism-dependent (Okafor and Opuene 2006). BCF represents the uptake of metals into an organism from the surrounding water alone.…”

“…The treatment of B. bayad samples was based on an established procedure (Okafor and Opuene 2006). Before analysis, the catfishes were dehydrated to a constant weight using an oven at 65°C for 20 h and individual whole fish pulverised to a uniform particle size.…”

“…Internal blanks were used to assess any background contamination originating from sample manipulation and preparation. Blanks were processed exactly as respective regular samples as well (Okafor and Opuene 2006).…”