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Assessment of contamination, distribution and chemical speciation of trace metals in water column in the Dakar coast and the Saint Louis estuary from Senegal, West Africa.

Abstract：

:The water column from Dakar coast and Saint Louis estuary in Senegal, West Africa, was sampled in order to measure the contamination level by trace metals. The speciation of metals in water allowed performing a distribution between dissolved and particulate trace metals. For the dissolved metals, the metallic concentration and repartition between the organic fraction and the inorganic fraction were performed. The results show that the pollution of the estuary was more serious than in Dakar coast for Co, Cr, Ni, Pb and Zn; while, Cd and Cu were higher in Dakar coast. A strong affinity between metals and suspended particles has been revealed. Dissolved metals that have a tendency to form organic metal complexes are in decreasing order: Cd, Zn, Pb, Co=Cr=Mn, Cu and Ni. The results showed that the mobility of trace metals in estuary is controlled by dissolved organic carbon, while in coast it depends on chlorides.

journal_name

Mar Pollut Bull

journal_title

Marine pollution bulletin

authors

Diop C,Dewaelé D,Diop M,Touré A,Cabral M,Cazier F,Fall M,Diouf A,Ouddane B

doi

10.1016/j.marpolbul.2014.06.051

subject

Has Abstract

pub_date

2014-09-15 00:00:00

pages

539-546

issue

1-2

eissn

0025-326X

issn

1879-3363

pii

S0025-326X(14)00431-7

journal_volume

86

pub_type

杂志文章

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