Source Identification and Potential Ecological Risk Assessment of Heavy Metals in the Topsoil of the Weining Plain (Northwest China)

Liu, Yanlin; Li, Peiyue; Liu, Leining

doi:10.1007/s12403-021-00438-0

Cited by 47 publications

(17 citation statements)

References 67 publications

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“…Moreover, non‐point source (NPS) pollution can also contribute heavy metals to the rivers. The regions, which are located adjacent to industrial parks, are easily polluted with heavy metals due to the wastes and wastewater discharges (Li, Li, & Liu, 2022; Wang et al, 2021). The discharged heavy metals could adsorb onto the suspending solids in the wastewater and then precipitated and accumulated in river sediments.…”

Section: Introductionmentioning

confidence: 99%

Toxicity evaluation of a heavy‐metal‐polluted river: Pollution identification and bacterial community assessment

Verpoort

et al. 2023

Water Environment Research

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The Salt River is an important urban river in Kaohsiung, Taiwan. In this study, the source identification and risk and toxicity assessment of the heavymetal-contaminated sediments in the Salt River were investigated. The geo-accumulation index (Igeo), enrichment factor (EF), sediment quality guidelines (SQGs), potential ecological risk index (RI), pollution load index (PLI), and toxic units (TU) were applied to determine effects of heavy metals on microbial diversities and ecosystems. Results from the ecological and environmental risk assessment show that high concentrations of Zn, Cr, and Ni were detected in the midstream area and the sum of toxic units (ΣTUs) in the midstream (7.2-32.0) is higher than in the downstream (14.0-19.7) and upstream (9.2-17.1). It could be because of the continuous inputs of heavymetal-contained wastewaters from adjacent industrial parks. Results also inferred that the detected heavy metals in the upstream residential and commercial areas were possibly caused by nearby vehicle emissions, non-point source pollution, and domestic wastewater discharges. Results of metagenomic assays show that the sediments contained significant microbial diversities.Metal-tolerant bacterial phyla (Proteobacteria: 24.4%-46.4%, Bacteroidetes:1.3%-14.8%, and Actinobacteria: 2.3%-11.1%) and pathogenic bacterial phyla (Chlamydiae: 0.5%-37.6% and Chloroflexi: 5.8%-7.2%) with relatively high abundance were detected. Metal-tolerant bacteria would adsorb metals and cause the increased metal concentrations in sediments. Results indicate that the bacterial composition in sediment environments was affected by anthropogenic pollution and human activities and the heavy-metal-polluted ecosystem caused the variations in bacterial communities.

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Section: Introductionmentioning

confidence: 99%

Toxicity evaluation of a heavy‐metal‐polluted river: Pollution identification and bacterial community assessment

Verpoort

et al. 2023

Water Environment Research

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“…While Zn is an essential element of the human body, excessive intake of Zn can lead to loss of appetite, diarrhea, and anemia, and Hg can cause Minamata disease. Thus, the problem of soil HM pollution has received extensive attention worldwide 8 . HMs in the soil can enter the human body through ingestion, dermal contact, and inhalation.…”

Section: Introductionmentioning

confidence: 99%

Human health-risk assessment of heavy metal–contaminated soil based on Monte Carlo simulation

Panqing

Abliz

Sun

et al. 2023

Sci Rep

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Soil contamination soils of by heavy metals (HMs) poses serious threats to the soil environment and enters the human body through exposure pathways such as ingestion and skin contact, posing a threat to human health. The purpose of this study was to analyze the sources and contributions of soil HMs, and to quantitatively assess the human health risks of soil HMs to different populations (i.e. children, adult females and adult males), and to analyze the human health risks caused by various sources of sensitive populations. 170 topsoil (0–20 cm) were collected from Fukang, Jimsar and Qitai on the northern slope of Tianshan Mountains in Xinjiang, China, and the contents of Zn, Cu, Cr, Pb and Hg were determined. This study used the Unmix model and a health-risk assessment (HRA) model to assess the human health risks of five HMs. The results showed that: (1) The mean values of Zn and Cr were lower than the background values of Xinjiang, the mean values of Cu and Pb were slightly higher than the background values of Xinjiang but lower than the national standard, and the mean value of Hg and Pb was higher than the background value of Xinjiang and the national standard. (2) The sources of soil HMs in the region were mainly traffic, natural, coal, and industrial sources. Moreover, the HRA model combined with Monte Carlo simulation showed similar trends in the health-risk status of all population groups in the region. Probabilistic HRA revealed that noncarcinogenic risks were acceptable for all populations (HI < 1) while carcinogenic risks were high (children: 77.52%; female: 69.09%; male: 65.63%). For children, carcinogenic risk from industrial and coal sources exceeded the acceptable threshold by 2.35 and 1.20 times, respectively, and Cr was the main element contributing to human carcinogenic risk. These findings suggest that carcinogenic risks from coal-based Cr emissions cannot be ignored, and the study area should aim to control Cr emissions from industrial sources. The results of this study provide support for the prevention of human health risks and the control of soil HMs pollution across different age groups.

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“…In the agricultural ecosystem, mass balance studies (input–output) suggested that atmospheric deposition was an important pathway of Cd input worldwide (Figure S1). Cd from atmospheric deposition can significantly increase the bioavailable Cd concentration in soil solution , and then can be readily accumulated in crops and enter food chains, exposing humans via the consumption of Cd contaminated food. , …”

Section: Introductionmentioning

confidence: 99%

“…Cd from atmospheric deposition can significantly increase the bioavailable Cd concentration in soil solution 5,6 and then can be readily accumulated in crops and enter food chains, exposing humans via the consumption of Cd contaminated food. 7,8 For plant uptake of atmospherically deposited Cd, the main modes are foliar and root uptake. 5,6,8,9 Unlike root metal transfer that has been largely studied, only a few studies have attempted to explore and examine the foliar uptake of atmospheric heavy metal.…”

Section: Introductionmentioning

confidence: 99%

Stable Isotope Ratios Trace the Rice Uptake of Cadmium from Atmospheric Deposition via Leaves and Roots

Xia,

Zhou,

Sun

et al. 2023

Environ. Sci. Technol.

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Cadmium (Cd) stable isotopes provide a novel technique to investigate the fate of Cd in the environment, but challenges exist for tracing the sources in the plants. We performed individual rice leaf and root exposures to dry and wet deposition using customized open-top chambers (OTCs) in the greenhouse and in the field next to a smelter, respectively. The field experiment also included a control without Cd deposition and a "full" treatment. The exposure experiments and isotope signatures showed that leaves can directly take up atmospheric Cd and then translocate within rice plants to other tissues, contributing 52−70% of Cd in grains, which exceeded the contribution (30−48%) by root exposure. The Cd isotopes in leaves, nodes, internodes, and grains demonstrate that roots preferentially take up Cd from wet deposition, but leaves favor uptake of Cd from dry deposition. The Cd uptake by leaves is redistributed via nodes, allowing for upward transport to the grains but preventing downward transport to the roots. Leaves favor uptake of heavy isotopes from atmospheric deposition (ΔCd 114/110 Leaf-Dust : 0.10 ± 0.02‰) but retain light isotopes and transport heavy isotopes to the nodes and further to grains. These findings highlight the contribution of atmospheric deposition to rice and Cd isotopes as a useful tracer for quantifying sources in plants when different isotopic compositions are in sources.

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Source Identification and Potential Ecological Risk Assessment of Heavy Metals in the Topsoil of the Weining Plain (Northwest China)

Cited by 47 publications

References 67 publications

Toxicity evaluation of a heavy‐metal‐polluted river: Pollution identification and bacterial community assessment

Toxicity evaluation of a heavy‐metal‐polluted river: Pollution identification and bacterial community assessment

Human health-risk assessment of heavy metal–contaminated soil based on Monte Carlo simulation

Stable Isotope Ratios Trace the Rice Uptake of Cadmium from Atmospheric Deposition via Leaves and Roots

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