Organic matter and trace metals levels in sediment of bonny river and creeks around Okrika in Rivers State, Nigeria

International Journal of Physical Sciences

Marcus A. C.¹ 

关键词: Organic matter;    trace metals;    anthropogenic enrichment;    Bonny River.;   

DOI  :  10.5897/IJPS13001

学科分类：物理（综合）

来源: Academic Journals

【 摘 要 】

Analysis was carried out on the sediment of Bonny River and creeks around Okrika in order to determine the concentrations of organic matter, lead, nickel, vanadium and cadmium as well as their probable sources and diagenesis. Samples for trace metal analysis were prepared by acid digestion and analysed by atomic absorption spectrophotometry. Organic matter content was determined by the method of Walkey and Black. Mean concentrations (µg/g, dry wt) of trace metals were: Pb(23.22 ± 13.43), Ni (57.19 ± 16.93), V (0.06 ± 0.05), Cd(0.24 ± 0.32)while organic matter (% dry wt) were:TOC(1.14 ± 0.40) and TOM(1.990 ± 0.70) and revealed anthropogenic trace metal enrichment. The large standard deviations indicate temporal and spatial variations due largely to anthropogenic waste input. There was a weak association for Pb/organic matter (/r/=0.58, p<0.01) in the wet season suggesting a common source, most likely from land-derived wastes brought in by runoff water.

【 授权许可】

CC BY