التفاصيل البيبلوغرافية
| العنوان: |
Concentrations and ecological risks of metals in surface sediments of some coastal creeks in the Niger Delta, Nigeria. |
| المؤلفون: |
Iwegbue, CMA, Beecroft, OV, Ogala, JE, Egobueze, FE, Tesi, GO, Nwajei, GE, Martincigh, BS |
| المصدر: |
African Journal of Aquatic Science; Sep2018, Vol. 43 Issue 3, p241-253, 13p |
| مصطلحات موضوعية: |
ECOLOGICAL risk assessment, POLLUTION, SOIL quality, SPECTROPHOTOMETRY |
| مصطلحات جغرافية: |
NIGER River Delta (Nigeria) |
| مستخلص: |
The concentrations of nine metals were measured by atomic absorption spectrophotometry in surface sediments of three coastal creeks, namely, the Ifie, Egbokodo and Ubeji creeks, in the Niger Delta of Nigeria, from August 2012 to January 2013. The aim of the study was to provide information on the spatial and seasonal distribution patterns, degree of contamination, and ecological risks of metals in these sediments. The mean concentrations of the nine metals in these creek sediments ranged from 0.30 to 3.20 mg kg−1 Cd; 10.7 to 24.7 mg kg−1 Pb, 125 to 466 mg kg−1 Cr; 3.1.10 to 14.9 mg kg−1 Cu; 4.7 to 14.3 mg kg−1 Co; 61.1 to 115 mg kg−1 Ni; 106 to 183 mg kg−1 Mn; 52.0 to 170 mg kg−1 Zn and 5 469 to 20 639 mg kg−1 Fe. In general, the metal concentrations were higher in the dry season than the wet season, except for Cr. The concentrations of Cd, Cr, Ni and Zn were above their regulatory control limits in sediment as specified by the Nigerian Regulatory Authority and Cd was identified as the main ecological risk factor. The enrichment factors for the studied metals followed the order: Cd > Cr > Ni > Zn > Pb > Co > Mn > Cu. The average multiple pollution index values indicated that these sediments were severely polluted with significant inputs from Cd, Ni and Cr. [ABSTRACT FROM AUTHOR] |
|
Copyright of African Journal of Aquatic Science is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
PDF full text from Publisher 
Full Text Finder