Coupling in vitro assays with sequential extraction to investigate cadmium bioaccessibility in contaminated soils

Li, Shiwei; Chang, Ming Chau; Huang, Xiaoyue; Li, Helian; Li, Hongbo; Lena, Q.

doi:10.1016/j.chemosphere.2021.132655

Cited by 18 publications

(6 citation statements)

References 26 publications

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“…In natural soils the bioaccessible fraction is generally very low [99,100] and also in this study in the unpolluted soil, the Cd bioaccessible concentration was very low (0.02 mg kg −1 ). In contrast in the contaminated samples, the Cd concentration values in the bioaccessible extracts were often rather high in both sampling campaigns with values ranging from 40 to 60% of the total content similarly to what was found for this metal in previous studies [99,101]. The differences between the two concentrations were not statistically significant (Table 6).…”

Section: Effect Of Ageing On CD Bioaccessibilitysupporting

confidence: 74%

Effect of Soil Aging on Cadmium Bioavailability and Bioaccessibility at a Contaminated Site

et al. 2023

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The effect of aging on cadmium (Cd) bioavailability and bioaccessibility was investigated in naturally aged field soil within a contaminated site. The results, which are based on a comparison of investigations carried out in 2018 and 2022 on the same soil samples, provide a realistic evaluation of the variation in Cd chemical forms due to long-term aging. The data obtained show a significant reduction (from approximately 30% to 60%) in the mobile and bioavailable forms of cadmium, while the total quantity in soil did not change significantly. The effect of aging on the bioavailable fractions is also reflected in the reduction in the amount of the metal absorbed by plants. On the one hand, this indicates a reduction in the potential contamination of the food chain, while on the other, it highlights the limitations of the use of phytoextraction as a clean-up technology in this specific site. In the case under study, it should also be noted that there was no decrease in cadmium bioaccessibility over time, which remained very high even after four years of cadmium aging in the soil, which was about 60% of the total content in the most contaminated soil samples. This highlights the potential health risks related to the incidental ingestion of Cd-contaminated soil, which could become the main exposure route in the case of the final use of the site as a park or public green area.

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Section: Effect Of Ageing On CD Bioaccessibilitysupporting

confidence: 74%

Effect of Soil Aging on Cadmium Bioavailability and Bioaccessibility at a Contaminated Site

et al. 2023

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“…Although no other study using gold-mining waste has reported Cd bioaccessibility, the results of this study can be compared to findings in Li et al, [ 70 ], where using the same assay conditions, high Cd bioaccessibility (35.0 – 107%) was observed in 12 soils from diverse contamination sources (e.g., mining/smelting, farming and residential activities). However, soils used in Li et al, [ 70 ] contained higher total Cd concentrations (3.00 – 269 mg/kg) and lower total Al, Fe and Mn concentrations in the < 2 mm particle fractions (0.74 – 5.88 g/kg, 1.76 – 45.5 g/kg, and 2.58 – 8,463 mg/kg respectively). This suggestis that the higher Al+Fe+Mn:Cd ratio in this study most likely contributed to stronger sorption of Cd to minerals, resulting in low bioaccessibility.…”

Section: Resultssupporting

confidence: 56%

Arsenic, cadmium, lead, antimony bioaccessibility and relative bioavailability in legacy gold mining waste

Kastury,

Besedin,

Betts

et al. 2024

Journal of Hazardous Materials

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“…Considering only the bioaccessibility of metals or the DF of PM 2.5 may cause overestimation. Exposure experiments showed that only part of the PM 2.5 remains in the pulmonary region for more than 24 h. Moreover, some studies proved that the simulation results of in vitro bioavailability have a good connection with the results in mice [ 23 , 24 , 31 , 32 , 93 ]. Both bioaccessibility and DF are influential factors for human health risk assessment and the assessment results may be similar to the lung deposition environment and avoid overestimation.…”

Section: Resultsmentioning

confidence: 95%

“…This study only considered the deposition fraction of PM 2.5 in the pulmonary region, and considered less the possible effects of other particle sizes on the deposition fraction of PM 2.5 ; in addition, there are differences in composition and the bioaccessibility of heavy metals between simulated lung fluid and bronchoalveolar lavage fluid [ 24 , 32 ].…”

Section: Resultsmentioning

confidence: 99%

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Inhalation Bioaccessibility and Risk Assessment of Metals in PM2.5 Based on a Multiple-Path Particle Dosimetry Model in the Smelting District of Northeast China

Sun

Zheng

Wang

et al. 2022

IJERPH

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PM2.5 can deposit and partially dissolve in the pulmonary region. In order to be consistent with the reality of the pulmonary region and avoid overestimating the inhalation human health risk, the bioaccessibility of PM2.5 heavy metals and the deposition fraction (DF) urgently needs to be considered. This paper simulates the bioaccessibility of PM2.5 heavy metals in acidic intracellular and neutral extracellular deposition environments by simulating lung fluid. The multipath particle dosimetry model was used to simulate DF of PM2.5. According to the exposure assessment method of the U.S. Environmental Protection Agency, the inhalation exposure dose threshold was calculated, and the human health risk with different inhalation exposure doses was compared. The bioaccessibility of heavy metals is 12.1–36.2%. The total DF of PM2.5 in adults was higher than that in children, and children were higher than adults in the pulmonary region, and gradually decreased with age. The inhalation exposure dose threshold is 0.04–14.2 mg·kg−1·day−1 for the non-carcinogenic exposure dose and 0.007–0.043 mg·kg−1·day−1 for the carcinogenic exposure dose. Cd and Pb in PM2.5 in the study area have a non-carcinogenic risk to human health (hazard index < 1), and Cd has no or a potential carcinogenic risk to human health. A revised inhalation health risk assessment may avoid overestimation.

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Coupling in vitro assays with sequential extraction to investigate cadmium bioaccessibility in contaminated soils

Cited by 18 publications

References 26 publications

Effect of Soil Aging on Cadmium Bioavailability and Bioaccessibility at a Contaminated Site

Effect of Soil Aging on Cadmium Bioavailability and Bioaccessibility at a Contaminated Site

Arsenic, cadmium, lead, antimony bioaccessibility and relative bioavailability in legacy gold mining waste

Inhalation Bioaccessibility and Risk Assessment of Metals in PM2.5 Based on a Multiple-Path Particle Dosimetry Model in the Smelting District of Northeast China

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