 |
| Titel |
Environmental Geochemistry Of Kor River Sediments Near The Petrochemical Complex Of Shiraz, SW Iran |
| VerfasserIn |
F. Moore, A. Chahardahcherik |
| Konferenz |
EGU General Assembly 2009
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250019217
|
|
|
|
|
|
| Zusammenfassung |
| Heavy metal contamination in aquatic environments has received a good amount of attention
due to toxicity, persistence, and subsequent accumulation in aquatic habitats. The Kor River
is 280 Km long and, its drainage basin is situated North East of Shiraz. Nowadays, various
industries exist in this region. Water quality problems mainly arise from effluents of a
petrochemical complex. In this Study, concentration, occurrence and geochemical behavior of
heavy metals, sediment contamination, and bioavailability of metals in river sediments are
investigated. Water and sediment samples near the petrochemical complex were
collected and analyzed. The results show that many of metals are accumulated in
sediments, probably due to pH of the water above 8. Correlation coefficients show
that most of the metals are positively correlated with manganese and negatively
correlated with organic matter. Hence, organic matter has probably no important effect
on the concentration of elements. Calculation of contamination degree indicates
that sediments are uncontaminated or slightly contaminated. Cobalt and Cadmium
Concentrations are high in bioavailable portions, in the form of iron and manganese oxides
and hydroxides. However, low cation exchange capacities of sediments indicate
that the Kor River sediments probably act as a sink for trace metals and are not
effectively involved in exchanging them. Nevertheless, changes in the potential of the
aquatic system may quickly remobilize most of the metals into the solution and
present environmental contamination risks to the biological components of river
system.
Keywords: Kor River, Heavy Metals, Contamination Degree, Cation Exchange Capacity,
Bioavailability. |
|
|
|
|
|
|