Ecological and Health Risk Assessment of Heavy Metal Pollution in Farmland Soil of Xianghe County

被引：0
|
作者：
Chen Y.-J. [1 ]
Qu X.-C. [2 ]
Zhang B. [3 ]
Li X.-T. [3 ]
Zhu G.-P. [3 ]
Zha T.-G. [1 ,4 ,5 ,6 ]
机构：
[1] School of Soil and Water Conservation, Beijing Forestry University, Beijing
[2] Gansu Mining Development Research Institute, Lanzhou
[3] Beijing Zhongqi Jingcheng Environmental Technology Co., Ltd., Beijing
[4] Jixian County National Forest Ecosystem Observation and Research Station, Beijing Forestry University, Beijing
[5] Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing
[6] Beijing Engineering Research Center of Soil and Water Conservation, Beijing Forestry University, Beijing
来源：
Huanjing Kexue/Environmental Science | 2022年 / 43卷 / 12期
关键词：
ecological risk assessment; farmland soil; health risk assessment; soil heavy metal pollution; Xianghe County;
D O I：
10.13227/j.hjkx.202202122
中图分类号：
学科分类号：
摘要：
In order to systematically study the soil heavy metal pollution of agricultural land in Xianghe County, Hebei province, 288 surface (0-20 cm) soil samples were collected using the grid method. The distribution characteristics of Cd, Cr, Hg, Ni, Pb, As, Cu, and Zn in soil samples were analyzed, and the single factor index, Newerow comprehensive pollution index, geo-accumulation index, potential ecological risk index, and human health risk index were used to evaluate their pollution status, ecological risk, and health risk. The results showed that: ① the contents of heavy metals in Xianghe County soil were all lower than the screening values, but there was a strong spatial variation. Enrichment factor analysis showed that 20.74% of Hg and 0.33% of Cd were significantly polluted, 68.56% of Hg and 20.40% of Cd were moderately polluted, and the other heavy metals were at the level of no or weak pollution. ② The over-standard rate of the Newerow comprehensive pollution index was 8.68%, which was mainly distributed in the western and central parts of Xianghe County. ③ The geo-accumulation index evaluation showed that the soil Cd, Pb, and Zn pollution was relatively serious, Hg pollution was the most serious, and the sites with moderate pollution and above accounted for 46.50%. ④According to the potential ecological risk index, the soil was dominated by medium and strong potential ecological risk, accounting for 46.15% and 37.46%, respectively, with 1.34% of the heavy metals reaching the level of extremely strong potential ecological risk. The heavy metals that reached the level of medium and above were Cd and Hg. ⑤ The health risks of soil heavy metals were low, and the non-carcinogenic risks from any exposure route were generally acceptable. Soil Cr, As, and Pb were the three biggest contributing factors to the non-carcinogenic risk in each township, and As in the soil was the main carcinogenic risk factor in each township. The health risk caused by heavy metals in soil was higher for children than for adults, and exposure through food intake was the main exposure route. This suggested that Xianghe County should take corresponding measures to strengthen prevention and control according to the differences in industrial distribution, soil heavy metal content, and ecological and health risks among townships and towns. © 2022 Science Press. All rights reserved.
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页码：5728 / 5741
页数：13
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