Heavy Metal Concentration and Assessment of Environmental Quality in Atmospheric Dust near Ground of Tangshan City

Abstract

Abstract:

The 161 atmospheric dust samples gathered near the ground of Tangshan City were studied for the concentration and environmental quality of heavy metals. The atmospheric dust near the ground of Tangshan City was assessed for the environmental quality of heavy metals with single-factor contaminant index and Nemerow multi-factor index method and was interpolated to a distribution map by using the spatial analysis module of ARCGIS. The results had shown that the actual content of all the heavy metals in the atmospheric dust near the ground of Tangshan City was over their original background level. The variance indices of Zn,Cd,Pb,Cu,Hg,Cr,Ni and As in the atmospheric dust near the ground of Tangshan City were 43.23%,213.99%,113.21%,29.56%,70.83%,51.80%,29.21%,32.67%, respectively. Cd and Pb were the strong variance elements. The results of the environmental quality of heavy metals with single-factor contaminant index had shown that Cd and Zn were the serious pollution level and Cr,Hg,Pb,Cu,Ni were the potential pollution level, As was the clean level. The results showed that the elements, according to the environmental quality of heavy metals with single-factor contaminant index,were followed by Cd>Zn>Cu>Cr>Pb>Hg>Ni>As. The results of the environmental quality of heavy metals with Nemerow multi-factor index had shown the heavy metal pollution in the atmospheric dust near the ground of Tangshan city was serious. Considering synthetically the pollution level of heavy metals, the percentage of clean, potential pollution, light pollution, heavy pollution and severe pollution were 0,3.72%,52.19%,38.51%,5.58%,respectively. The sum of proportion of heavy pollution and severe pollution reached 44.09%. High concentration of heavy metals in atmospheric dust was coincided with the distribution of industrial and developed transportation area. The heavy metal pollution may be associated with the use of coal and the traffic and other sources of pollution.

Key words: atmospheric dust near ground, heavy metal, environmental quality, assessment, Tangshan City

CLC Number:

X823

CUI Xingtao, LIU Wei. Heavy Metal Concentration and Assessment of Environmental Quality in Atmospheric Dust near Ground of Tangshan City[J]. Geoscience, 2017, 31(01): 184-190.

Figures/Tables 9

References 22

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元素	Ⅰ级(≤)	Ⅱ级(≤)	Ⅲ级(≤)	Ⅳ级(≤)	Ⅴ级(>)
As	15.00	25.0	40.0	60.0	60.0
Cd	0.20	0.6	1.0	3.0	3.0
Hg	0.15	1.0	1.5	3.0	3.0
Pb	35.00	350.0	500.0	1 000.0	1 000.0
Cr	90.00	250.0	300.0	600.0	600.0
Zn	100.00	300.0	500.0	1 000.0	1 000.0
Cu	35.00	100.0	400.0	800.0	800.0
Ni	40.00	60.0	200.0	400.0	400.0

元素	Ⅰ级(≤)	Ⅱ级(≤)	Ⅲ级(≤)	Ⅳ级(≤)	Ⅴ级(>)
As	15.00	25.0	40.0	60.0	60.0
Cd	0.20	0.6	1.0	3.0	3.0
Hg	0.15	1.0	1.5	3.0	3.0
Pb	35.00	350.0	500.0	1 000.0	1 000.0
Cr	90.00	250.0	300.0	600.0	600.0
Zn	100.00	300.0	500.0	1 000.0	1 000.0
Cu	35.00	100.0	400.0	800.0	800.0
Ni	40.00	60.0	200.0	400.0	400.0

类别	As	Cd	Hg	Pb	Cr	Zn	Cu	Ni
最小值	3.33	0.24	0.06	18.90	36.40	76.60	16.80	20.60
最大值	25.30	91.70	1.57	1 529.00	548.00	1 529.00	190.00	83.30
平均值	12.66	3.43	0.26	121.79	132.23	479.00	59.30	40.54
标准差	4.14	7.34	0.19	137.88	68.50	207.09	17.53	11.84
变异系数/%	32.67	213.99	70.83	113.21	51.80	43.23	29.56	29.21
富集系数(K₁)	1.87	34.30	4.06	4.85	2.86	7.56	2.83	2.34

类别	As	Cd	Hg	Pb	Cr	Zn	Cu	Ni
最小值	3.33	0.24	0.06	18.90	36.40	76.60	16.80	20.60
最大值	25.30	91.70	1.57	1 529.00	548.00	1 529.00	190.00	83.30
平均值	12.66	3.43	0.26	121.79	132.23	479.00	59.30	40.54
标准差	4.14	7.34	0.19	137.88	68.50	207.09	17.53	11.84
变异系数/%	32.67	213.99	70.83	113.21	51.80	43.23	29.56	29.21
富集系数(K₁)	1.87	34.30	4.06	4.85	2.86	7.56	2.83	2.34

类别	As	Cd	Hg	Pb	Cr	Zn	Cu	Ni
最小值	0.222	1.100	0.400	0.540	0.404	0.766	0.480	0.515
最大值	2.020	33.567	3.047	4.529	3.827	4.529	2.300	2.166
平均值	0.870	3.903	1.101	1.267	1.269	2.675	1.363	1.093
污染等级	清洁	重污染	潜在污染	潜在污染	潜在污染	重污染	潜在污染	潜在污染