|Table of Contents|

Characteristic and Evaluation of Soil Pollution by Heavy Metal in Different Greenbelts of Hohhot

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年16
Page:
110-116
Research Field:
Publishing date:

Info

Title:
Characteristic and Evaluation of Soil Pollution by Heavy Metal in Different Greenbelts of Hohhot
Author(s):
YANG Yongzhi1; YAN Haixia2; MA Mude2
(1.College of Forestry,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010019；2.Hohhot Environmental Monitoring Center,Hohhot,Inner Mongolia 010030)
Keywords:
urban soil; different greenbelts; heavy metal pollution; characteristic; assessment
PACS:
-
DOI:
10.11937/bfyy.20184153
Abstract:
The city parks,residential areas,and urban roads in Hohhot were selected as the research objects.Forty-five soil samples were collected by triple subsampling technique in the three functional zones.To investigate and analyze the heavy metal pollution in soil in different green spaces and different zones of Hohhot,the pollution of heavy metal was assessed with single factor pollution index and Nemerow integrated pollution index,and the pollution sources were discriminated by principal component analysis.The aim of this study was to provide a scientific basis for soil environmental protection and heavy metal pollution prevention in green space of Hohhot.Contents of six kinds of heavy metals were analyzed in different green spaces of Hohhot.The mean contents of heavy metals in soil samples exceeded the corresponding background values in the Inner Mongolia Autonomous Region.The mean contents of Cu and Cr were 2.20 times and 1.68 times,respectively,as high as the soil background values of the Inner Mongolia Autonomous Region.Single factor pollution index showed that the urban soil in Hohhot has been polluted by heavy metals.The Cu pollution was moderate in road greenbelts and residential areas,and mild in park greenbelts.The pollution degree was Cu>Cr>Zn>Pb>Ni>As.Nemerow integrated pollution index showed that soils from the road greenbelts were moderately polluted by heavy metals.The soils from residential areas were mildly polluted.And the soils from city parks were slightly polluted.The soils were moderately polluted by heavy metals in the west of Hohhot.The rest of the soils were mildly polluted.The Nemerow integrated pollution index of the different areas ranked as follows,road greenbelts(2.09)>residential areas(1.83)>city parks (1.54)；west(2.04)>south(1.78)>east(1.77)>centre(1.76)>north(1.73).The results of principal component analysis showed that the heavy metals in soil of Hohhot came from different sources.Cu,Cr and Ni were mainly originated from anthropogenic sources while As was mainly controlled by natural sources.

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Last Update: 2019-08-30