CONCENTRATION CHARACTERISTICS AND POLLUTION ASSESSMENT OF HEAVY METALS IN SOIL OF A WITHDRAWAL CULTIVATED LAND IN SUBURB OF NANJING

CHEN Rui; DU Shuangjie; XU Wei; ZHU Tao

doi:10.13205/j.hjgc.202203016

Volume 40 Issue 3

Mar. 2022

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CHEN Rui, DU Shuangjie, XU Wei, ZHU Tao. CONCENTRATION CHARACTERISTICS AND POLLUTION ASSESSMENT OF HEAVY METALS IN SOIL OF A WITHDRAWAL CULTIVATED LAND IN SUBURB OF NANJING[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 102-110,165. doi: 10.13205/j.hjgc.202203016

Citation:

CHEN Rui, DU Shuangjie, XU Wei, ZHU Tao. CONCENTRATION CHARACTERISTICS AND POLLUTION ASSESSMENT OF HEAVY METALS IN SOIL OF A WITHDRAWAL CULTIVATED LAND IN SUBURB OF NANJING[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 102-110,165. doi: 10.13205/j.hjgc.202203016

Citation:

CHEN Rui, DU Shuangjie, XU Wei, ZHU Tao. CONCENTRATION CHARACTERISTICS AND POLLUTION ASSESSMENT OF HEAVY METALS IN SOIL OF A WITHDRAWAL CULTIVATED LAND IN SUBURB OF NANJING[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 102-110,165. doi: 10.13205/j.hjgc.202203016

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CONCENTRATION CHARACTERISTICS AND POLLUTION ASSESSMENT OF HEAVY METALS IN SOIL OF A WITHDRAWAL CULTIVATED LAND IN SUBURB OF NANJING

doi: 10.13205/j.hjgc.202203016

CHEN Rui^{1,2
,
,},
DU Shuangjie³,
XU Wei^1,2,
ZHU Tao⁴

1. Shanghai Municipal Engineering Design Institute(Group) Co., Ltd, Shanghai 200092, China;
2. Shanghai Shenhuan Environmental Engineering Co., Ltd, Shanghai 200092, China;
3. No.2 Institute of Geo-environment Survey of Henan, Zhengzhou 450012, China;
4. China University of Mining and Technology-Beijing, Beijing 100083, China

Received Date: 2021-04-01
Available Online: 2022-07-07

Abstract

Abstract

The concentration of 10 heavy metal elements (Cu, Ni, Cd, As, Pb, Hg, Be, Sb, Co, V) in the soil of a withdrawal farmland in suburb of Nanjing were analyzed and evaluated by comparing with the soil background values and risk screening values (the screening values of agricultural land and construction land). The main conclusions were as follows:1) the maximum content of the 10 heavy metals all exceed the background values. The maximum content of Cu, Cd, As, Pb and Hg exceeded the screening value of farmland. The maximum content of As and Co exceeded the screening value of construction land. The variation coefficient of Cd content was the largest and Hg was the second. 2) For the distribution characteristics of the concentration, the frequency of highest content of Hg, Cd, Pb in upper layer was higher than that in the lower layer, but As, and V was on the opposite. The content of Hg decreased from layer A to layer D in both maximum and median values, while content of Cd showed a U-shape. 3) Single factor index showed that Cu, Cd, As, Pb and Hg were heavily polluted with higher pollution degree than other heavy metals. Nemerov composite pollution index showed that more than 70% of the samples in each layer were in light pollution level, compared with the background values, more than 90% of the samples in each layer were in safe level compared with screening value of NY, and 100% of the samples in each layer were in safe level compared with JSH1. 4) As and Sb (0.810) had the highest correlation with each other, while Hg had weak correlation with other heavy metals. Combined with correlation analysis and principal component analysis, heavy metals mainly came from three sources:natural soil forming process, strong man-made sources of agricultural cultivation and weak man-made sources, like atmospheric deposition in suburban areas. The concentrations of Cu, Ni, Cd, As, Pb, Sb in soil were mainly affected by natural soil forming process firstly and then man-made sources, but Co and V were not affected by man-made sources. Hg and Be were greatly affected by man-made sources besides natural soil forming.
- withdrawal of cultivated land,
- pollution of heavy metals,
- single factor index method,
- Nemero composite pollution index,
- pollution assessment

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References(40)

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