Metal pollution and ecological risk assessment in marine sediments of Karachi Coast, Pakistan.

Environmental Monitoring and Assessment
A MashiatullahA Ghaffar

Abstract

Concentrations of 12 metals (Fe, Mn, Cr, Mo, Ni, Pb, Se, Sr, U, V, Zn, and Zr) in surface sediments of Karachi Coast, Pakistan were determined to evaluate their distribution and pollution assessment. The measured metals in the sediments were found to be in the range of Fe, 0.84-6.96 %; Mn, 300-1,300 μg/g; Cr, 12.0-319.84 μg/g; Mo, 0.49-2.03 μg/g; Ni, 1.53-58.86 μg/g; Pb, 9.0-49.46 μg/g; Se, 0.25-.86 μg/g; Sr, 192-1185 μg/g; U, 0.19-1.66 μg/g; V, 15.80-118.20 μg/g; Zn, 15.60-666.28 μg/g; and Zr, 44.02-175.26 μg/g. The mean contents of the metal studied were: Fe, 3.07 %, Mn, 0.05 %; Cr, 96.75 μg/g; Mo, 1.34 μg/g; Ni, 31.39 μg/g; Pb, 23.24 μg/g; Se, 0.61 μg/g; Sr, 374.83 μg/g; U, 0.64 μg/g; V, 61.75 μg/g; Zn, 204.75 μg/g; and Zr:76.27 μg/g, and arrangement of the metals from higher to lower mean content in this area is: Fe > Zn > Mn > Sr > Zn > Cr > Zr > V > Ni > Pb > Mo > U > Se. There is no significant correlation among most of these metals, indicating different anthropogenic and natural sources. To assess ecotoxic potential of marine sediments, Numerical Sediment Quality Guidelines were also applied. The concentration of Pb in all the sediments except one was lower than the threshold effect concentration (TECs) showing that the...Continue Reading

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Citations

Feb 7, 2015·Environmental Monitoring and Assessment·Z ShangX Wang
Apr 15, 2015·Environmental Monitoring and Assessment·Azhar MashiatullahAbdul Ghaffar
Dec 5, 2014·Environmental Monitoring and Assessment·Bibi Noorarlijannah Mohammad AliBaba Musta
Jun 24, 2017·Journal of Cellular Biochemistry·Kanwal RehmanMuhammad Sajid Hamid Akash
Dec 3, 2013·Environmental Monitoring and Assessment·Sivanandham VigneshRathinam Arthur James
Jan 17, 2017·Environmental Monitoring and Assessment·Ohene Karikari-Yeboah, Jonas Addai-Mensah
May 10, 2019·Environmental Science and Pollution Research International·Dong-Woon HwangTae-Hoon Kim
Jul 8, 2016·SpringerPlus·Kousar YasmeenMuddasir Hanif
Apr 5, 2021·Environmental Science and Pollution Research International·Milena RadomirovićSlavka Stanković
Feb 16, 2018·Ecotoxicology and Environmental Safety·Rasika KulkarniSmita Zinjarde
Jul 31, 2019·The Science of the Total Environment·Remedios Martínez-GuijarroDaniel Aguado

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