Distribution, sources and ecological risks of metals in surficial sediments of the Forcados River and its Estuary, Niger Delta, Nigeria

Distribution, sources and ecological risks of metals in surficial sediments of the Forcados River... The concentrations of eleven metals (Cd, Pb, Cr, Ni, Cu, Co, Ba, Mn, Zn, Fe and Al) were measured in surficial sediments of the Forcados River and its estuary situated in the Niger Delta, Nigeria. The aim of the study was to provide information on the influence of seasonal changes on the distribution patterns and sources of these metals and the ecological risks associated with exposure to metals in the river sediment system. Samples from nine locations were collected monthly for a period of 6 months covering both the wet and dry seasons. The sediment samples were digested with aqua regia, and the metal concentrations in the digests were quantified by means of inductively coupled plasma-atomic emission spectrometry (ICP-AES). The concentration ranges of metals in the sediments were: Cd 0.78–2.16, Pb 11.5–72.0, Cr 21.9–49.6, Ni 4.75–11.7, Cu 4.48–13.7, Co 5.03–11.7, Ba 2.04–3.34, Mn 153–545, Zn 11.7–35.1, Fe 9350–18,400 and Al 9560–25,000 mg kg−1. The results showed significant spatial and seasonal variations (p < 0.05) in the metal distribution patterns. The ecological risk indices indicate that low ecological risks are associated with exposure to these metals but with significant impact from Cd. The enrichment factors, and geoaccumulation and contamination/pollution indices, suggested that Cd is the main metal contaminant in the riverbed. Principal component analysis found that the sources of metals in the sediments include natural inputs, vehicular emissions and discharges from oil industries, waste dumps and riparian farmlands. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Earth Sciences Springer Journals

Distribution, sources and ecological risks of metals in surficial sediments of the Forcados River and its Estuary, Niger Delta, Nigeria

Loading next page...
 
/lp/springer_journal/distribution-sources-and-ecological-risks-of-metals-in-surficial-dmZRAidHPw
Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Earth Sciences; Geology; Hydrology/Water Resources; Geochemistry; Environmental Science and Engineering; Terrestrial Pollution; Biogeosciences
ISSN
1866-6280
eISSN
1866-6299
D.O.I.
10.1007/s12665-018-7344-3
Publisher site
See Article on Publisher Site

Abstract

The concentrations of eleven metals (Cd, Pb, Cr, Ni, Cu, Co, Ba, Mn, Zn, Fe and Al) were measured in surficial sediments of the Forcados River and its estuary situated in the Niger Delta, Nigeria. The aim of the study was to provide information on the influence of seasonal changes on the distribution patterns and sources of these metals and the ecological risks associated with exposure to metals in the river sediment system. Samples from nine locations were collected monthly for a period of 6 months covering both the wet and dry seasons. The sediment samples were digested with aqua regia, and the metal concentrations in the digests were quantified by means of inductively coupled plasma-atomic emission spectrometry (ICP-AES). The concentration ranges of metals in the sediments were: Cd 0.78–2.16, Pb 11.5–72.0, Cr 21.9–49.6, Ni 4.75–11.7, Cu 4.48–13.7, Co 5.03–11.7, Ba 2.04–3.34, Mn 153–545, Zn 11.7–35.1, Fe 9350–18,400 and Al 9560–25,000 mg kg−1. The results showed significant spatial and seasonal variations (p < 0.05) in the metal distribution patterns. The ecological risk indices indicate that low ecological risks are associated with exposure to these metals but with significant impact from Cd. The enrichment factors, and geoaccumulation and contamination/pollution indices, suggested that Cd is the main metal contaminant in the riverbed. Principal component analysis found that the sources of metals in the sediments include natural inputs, vehicular emissions and discharges from oil industries, waste dumps and riparian farmlands.

Journal

Environmental Earth SciencesSpringer Journals

Published: Mar 14, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off