ORIGINAL RESEARCH
Multivariate Analysis and Heavy Metals Pollution
Evaluation in Yellow River
Surface Sediments
Jun Ren1,2, Zhen Shang1, Ling Tao1,2, Xia Wang1
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1School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
2Engineering Research Center for Cold and Arid Regions, Water Resource Comprehensive Utilization,
Ministry of Education, Lanzhou 730070, P. R. China
Submission date: 2014-11-23
Final revision date: 2015-01-16
Acceptance date: 2015-01-18
Publication date: 2015-05-20
Pol. J. Environ. Stud. 2015;24(3):1041-1048
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ABSTRACT
The concentrations of heavy metals in 21 samples collected from surface sediments from the Qinghai
section of the Yellow were investigated in order to evaluate their distribution and pollution levels. The total
concentrations showed wide variations with Cu 11.86~57.02 mg/kg, Fe 17236.67~41340.00 mg/kg, Mn
431.93~877.27 mg/kg, Ni 14.58~86.11 mg/kg, Zn 67.18~149.00 mg/kg, Cr 87.84~169.70 mg/kg, Pb
1.21~20.69 mg/kg, and Cd 0.27~1.43 mg/kg. The mean values of the heavy metal contents were arranged in
the following decreasing order: Fe>Mn>Cr>Zn>Ni>Cu>Pb>Cd. The correlation between Cu, Fe, and Zn concentrations
was significantly positive. These heavy metals had common sources, mutual dependence, and
identical behavior during transport. However, there was no significant correlation among some of these metals,
indicating different anthropogenic and natural sources. PCA extracted three components with eigenvalues
explaining 76.259% of the total variance. Fe, Mn, and Zn had a common natural origin controlled by the first
component. Cu, Ni, and Cd could originate anthropogenic sources controlled by the second component. The
higher values of geo-accumulation index, enrichment factor, and pollution load index of Cr in the Qinghai section
were attributed principally to anthropogenic activities such as industrial effluents, vehicular emissions,
and terrigenous influx from the river. Zn appeared to pose no risk at all of the sites of the system. In total, the
pollution class from the Qinghai section of the river is 0-1, belonging to the unpolluted to moderately polluted
degree.