Distribution Characteristics and Risk Assessment of Accumulated Heavy Metals in Bioretention Systems

被引：3

作者：

Chu Y.-Y. ^{[1
]}

Yang L. ^{[1
]}

Zhou Y. ^{[1
]}

Wang X.-L. ^{[2
]}

Wang S.-Y. ^{[1
]}

Zhang M. ^{[1
]}

机构：

[1] China Urban Construction Design & Research Institute Co., Ltd., Beijing

[2] College of Urban and Environmental Sciences, Peking University, Beijing

来源：

Huanjing Kexue/Environmental Science | 2022年 / 43卷 / 07期

关键词：

Bioretention systems; Distribution characteristics; Heavy metal accumulation; Maintenance suggestions; Risk assessment;

D O I：

10.13227/j.hjkx.202107218

中图分类号：

学科分类号：

摘要：

Topsoil samples (0-10 cm) from four bioretention systems with different land-use types were collected, including parking lot, roadside, residential area, and industrial park systems. The accumulation contents of As, Hg, Cd, Cr, Pb, Cu, Ni, and Zn were analyzed and evaluated, as were the influencing factors, pollution level, potential ecological risk, and human health risk. The results showed that there were significant differences in the accumulated contents of eight heavy metals. The average ω(As), ω(Hg), ω(Cd), ω(Cr), ω(Pb), ω(Cu), ω(Ni), and ω(Zn) were 8.92, 0.25, 0.10, 31.56, 14.81, 21.27, 23.69, and 62.75 mg•kg-1, respectively, and the average contents of As and Hg were 1.26 and 5.21 times the soil background values, respectively. Correlation analysis showed that the contents of the eight heavy metals were positively correlated with soil organic matter, pH value (except Hg), and phosphorus content (except As). The results of the Nemerow Comprehensive Pollution Index and Hakanson Potential Ecological Index showed that the pollution level and ecological risk of the other seven heavy metals were relatively low, whereas the pollution level and ecological risk of Hg reached the level of severe pollution and strong ecological risk, respectively. Affected by Hg, the comprehensive pollution level and ecological risk were relatively high; thus, Hg was a potential threat to the soil environment. The non-carcinogenic risks of heavy metals in the four systems were acceptable, but the carcinogenic risks were all beyond 10-6 though lower than 10-4, which indicated that these four systems had a certain carcinogenic risk, in which As was the main risk factor. Among these four land-use types, the accumulated pollutant contents, pollution levels, ecological risk, and human health risk of parking lots and roadside bioretention systems were much higher than those of residential areas and industrial parks. © 2022, Science Press. All right reserved.

引用

页码：3608 / 3622

页数：14

共 72 条

[11]

Chu Y Y, Yang L, Wang X C, Et al., Research on distribution characteristics, influencing factors, and maintenance effects of heavy metal accumulation in bioretention systems: critical review, Journal of Sustainable Water in the Built Environment, 7, 2, (2021)

[12]

Costello D M, Hartung E W, Stoll J T, Et al., Bioretention cell age and construction style influence stormwater pollutant dynamics, Science of the Total Environment, 712, (2020)

[13]

Al-Ameri M, Hatt B, Le Coustumer S, Et al., Accumulation of heavy metals in stormwater bioretention media: a field study of temporal and spatial variation, Journal of Hydrology, 567, pp. 721-731, (2018)

[14]

Chen J L, Li R Y, Xie X J, Et al., Distribution characteristics and pollution evaluation of heavy metals in greenbelt soils of Nanjing city, Environmental Science, 42, 2, pp. 909-916, (2021)

[15]

Hakanson L., An ecological risk index for aquatic pollution control.a sedimentological approach, Water Research, 14, 8, pp. 975-1001, (1980)

[16]

Xiong Q L, Zhao J Y, Zhao W J, Et al., Pollution characteristics and potential ecological risks of heavy metals in topsoil of Beijing, China Environmental Science, 37, 6, pp. 2211-2221, (2017)

[17]

Bai D R, Zhang T, Bao J S, Et al., Pollution distribution and ecological risk assessment of heavy metals in river sediments from the ancient town of Suzhou, Environmental Science, 42, 7, pp. 3206-3214, (2021)

[18]

Zhou Y L, Yang Z B, Wang Q L, Et al., Potential ecological risk assessment and source analysis of heavy metals in soil-crop system in Xiong'an new district, Environmental Science, 42, 4, pp. 2003-2015, (2021)

[19]

Wu Z Y, Zhang L N, Xia T X, Et al., Quantitative assessment of human health risks based on soil heavy metals and pahs sources: take a polluted industrial site of Beijing as an example, Environmental Science, 41, 9, pp. 4180-4196, (2020)

[20]

Li C F, Cao J F, Lu J S, Et al., Ecological risk assessment of soil heavy metals for different types of land use and evaluation of human health, Environmental Science, 39, 12, pp. 5628-5638, (2018)

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