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Risk assessment of soil heavy metals associated with land use variations in the riparian zones of a typical urban river gradient.
Ecotoxicol Environ Saf. 2019 Oct 15; 181:435-444.EE

Abstract

Urbanization-induced land use changes in riparian area alter soil and water regimes in complex ways, which may also affect the migration and transformation of soil heavy metals and increase the risk of release. In this study, soil samples from the riparian zone of Beiyun River, which located in the rapidly urbanized Beijing metropolis, were collected and analyzed for heavy metals (As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn). Then their zoning distribution pattern along river (section 1 to section 4 from upper to low reaches) and the correlation of heavy metals between riparian soils and riverine sediments were investigated. Results showed that the average soil heavy metal concentrations of Cd, Cr, Cu and Zn in riparian zone were approximately 2.2, 1.7, 1.9 and 2.0 times higher than the background values. Sectionally, the concentrations of Cd, Ni, Pb and Zn displayed a decreasing order with section 2 > section 3 > section 4 > section 1, while the highest values of Cr and Cu were found in section 3. The concentrations of all heavy metals except Cr in artificial garden land were higher than those in other land use types, and the concentrations of Cr among five land use types were in the order of grass land > farmland > artificial garden land > forest land > forest-grass land. Generally, most of the heavy metals in the riverine sediments had higher contents than those in riparian zones, especially Cu and Zn. There was a decreasing order for the average geo-accumulation index (Igeo) of measured heavy metals in the soils of riparian zone: Zn (0.15) > Cr (0.08) > Cu (0.07) > Cd (-0.08) > As (-0.57) > Pb (-0.67) > Mn (-0.75) > Ni (-0.86), whereas they had different "high-low" orders in different land use types. The Igeo index indicated most regions of riparian zone were moderately polluted with Cd, Cr, Cu and Zn, especially in grass land and forest land. Also, Cd, Cr and Zn in riparian zone have positive relationships with the concentrations in riverine sediments. Health risk assessment showed that the contribution of ingestion HQ to HI was the highest among the three exposure pathways (ingestion, inhalation and dermal contact), and children had higher non-carcinogenic risk and carcinogenic risk index than adult. Our findings suggest that land use and soil in riparian zone should be protected and managed scientifically to control the riverine pollution and ensure human health.

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Publisher Full Text (DOI)

Authors+Show Affiliations

School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, 100875, China. Electronic address: shiliangliu@bnu.edu.cn.

School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, 100875, China.

School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, 100875, China.

School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, 100875, China.

Institute of Environmental Health and Ecological Security, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, PR China.

School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, 100875, China.

School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing, 100875, China.

MeSH

BeijingChildChinaEnvironmental MonitoringHumansMetals, HeavyRisk AssessmentRiversSoil PollutantsUrbanization

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31226658

Citation

Liu, Shiliang, et al. "Risk Assessment of Soil Heavy Metals Associated With Land Use Variations in the Riparian Zones of a Typical Urban River Gradient." Ecotoxicology and Environmental Safety, vol. 181, 2019, pp. 435-444.

Liu S, Pan G, Zhang Y, et al. Risk assessment of soil heavy metals associated with land use variations in the riparian zones of a typical urban river gradient. Ecotoxicol Environ Saf. 2019;181:435-444.

Liu, S., Pan, G., Zhang, Y., Xu, J., Ma, R., Shen, Z., & Dong, S. (2019). Risk assessment of soil heavy metals associated with land use variations in the riparian zones of a typical urban river gradient. Ecotoxicology and Environmental Safety, 181, 435-444. https://doi.org/10.1016/j.ecoenv.2019.04.060

Liu S, et al. Risk Assessment of Soil Heavy Metals Associated With Land Use Variations in the Riparian Zones of a Typical Urban River Gradient. Ecotoxicol Environ Saf. 2019 Oct 15;181:435-444. PubMed PMID: 31226658.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Risk assessment of soil heavy metals associated with land use variations in the riparian zones of a typical urban river gradient. AU - Liu,Shiliang, AU - Pan,Guohao, AU - Zhang,Yueqiu, AU - Xu,Jingwei, AU - Ma,Rui, AU - Shen,Zhenyao, AU - Dong,Shikui, Y1 - 2019/06/18/ PY - 2018/09/17/received PY - 2019/03/10/revised PY - 2019/04/18/accepted PY - 2019/6/22/pubmed PY - 2019/9/19/medline PY - 2019/6/22/entrez KW - Heavy metal KW - Land use KW - Riparian zone KW - Risk assessment KW - Urbanization SP - 435 EP - 444 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 181 N2 - Urbanization-induced land use changes in riparian area alter soil and water regimes in complex ways, which may also affect the migration and transformation of soil heavy metals and increase the risk of release. In this study, soil samples from the riparian zone of Beiyun River, which located in the rapidly urbanized Beijing metropolis, were collected and analyzed for heavy metals (As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn). Then their zoning distribution pattern along river (section 1 to section 4 from upper to low reaches) and the correlation of heavy metals between riparian soils and riverine sediments were investigated. Results showed that the average soil heavy metal concentrations of Cd, Cr, Cu and Zn in riparian zone were approximately 2.2, 1.7, 1.9 and 2.0 times higher than the background values. Sectionally, the concentrations of Cd, Ni, Pb and Zn displayed a decreasing order with section 2 > section 3 > section 4 > section 1, while the highest values of Cr and Cu were found in section 3. The concentrations of all heavy metals except Cr in artificial garden land were higher than those in other land use types, and the concentrations of Cr among five land use types were in the order of grass land > farmland > artificial garden land > forest land > forest-grass land. Generally, most of the heavy metals in the riverine sediments had higher contents than those in riparian zones, especially Cu and Zn. There was a decreasing order for the average geo-accumulation index (Igeo) of measured heavy metals in the soils of riparian zone: Zn (0.15) > Cr (0.08) > Cu (0.07) > Cd (-0.08) > As (-0.57) > Pb (-0.67) > Mn (-0.75) > Ni (-0.86), whereas they had different "high-low" orders in different land use types. The Igeo index indicated most regions of riparian zone were moderately polluted with Cd, Cr, Cu and Zn, especially in grass land and forest land. Also, Cd, Cr and Zn in riparian zone have positive relationships with the concentrations in riverine sediments. Health risk assessment showed that the contribution of ingestion HQ to HI was the highest among the three exposure pathways (ingestion, inhalation and dermal contact), and children had higher non-carcinogenic risk and carcinogenic risk index than adult. Our findings suggest that land use and soil in riparian zone should be protected and managed scientifically to control the riverine pollution and ensure human health. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/31226658/Risk_assessment_of_soil_heavy_metals_associated_with_land_use_variations_in_the_riparian_zones_of_a_typical_urban_river_gradient_ DB - PRIME DP - Unbound Medicine ER -