Effects of Soil Properties and Land Use Types on the Bioaccessibility of Cd, Pb, Cr, and Cu in Dongguan City, China

Tian, Haoqi; Wang, Yuzhe; Xie, Jing; Li, Hua; Zhu, Yuen

doi:10.1007/s00128-019-02740-9

Cited by 22 publications

(4 citation statements)

References 28 publications

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Section: Introductionmentioning

confidence: 97%

“…And the migration of PTE may affect the content of PTE in Puning soils. Meanwhile, previous studies found that these soils in Dongguan City (Tian et al, 2020), Jiedong District (Jiang et al, 2020), Gaogang Town (Cai, Wang, Wen, et al, 2019) and Huilai District (Jiang et al, 2021) of Guangdong Province had accumulated PTE to varying degrees. Puning is a typical industrial transfer undertaking area for rapid economic development in eastern Guangdong, and the rapid development of industries and enterprises may have a certain impact on the local soil environment, such as soil PTE pollution.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative analysis of ecological risk and human health risk of potentially toxic elements in farmland soil using the PMF model

Huang

Cai

et al. 2022

Land Degrad Dev

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Potentially toxic element (PTE) pollution in farmland soil is a global problem. It is vital to clarify the contributions of farmland soil PTE from different sources to potential ecological risk (PER) and human health risks (HHR), but the existing research methods were incomplete. This study explored a comprehensive scheme that combined source contribution and risk assessment to quantitatively assess PER, HHR and the priority pollution sources. enrichment factor (EF) and pollution load index (PLI) were utilized to estimate the features of enrichment and contamination of PTE in farmland soil. Furthermore, spatial distribution characteristics of PTE and positive matrix factorization (PMF) were combined to distinguish and ascertain the sources of PTE, and the PER and HHR model based on PMF were applied to evaluate the ecological and human health risks in different sources. Taking Puning District as an example, four sources of farmland soil PTE were quantitatively allocated. For ecological risk, the study area was at moderate ecological hazard, with industrial activities (53.67%) contributing the most. The mean of Hg was 69.82, reaching medium ecological risk. For human health risks, both adults and children had no non-carcinogenic risk in the study area, and the natural source was the greatest contributor, followed by agricultural activities. The total carcinogenic risk index (TCRI) values for adults and children were 1.40E-05 and 2.75E-05, respectively, showing no significant carcinogenic risk. Furthermore, compared with adults, the health risks of children, whether noncarcinogenic or carcinogenic, were higher than those of adults.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of ecological risk and human health risk of potentially toxic elements in farmland soil using the PMF model

Huang

Cai

et al. 2022

Land Degrad Dev

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“…The rst-principles is to use the Schrodinger equation to approximate the calculation content based on the most basic quantum physical chemistry and calculation requirements, so as to calculate the properties of crystals or substances 22 . The rst-principles calculation using the Vienna Ab initio Simulation Package (VASP) [23][24] software in this paper is based on density functional theory (DFT).…”

Section: Calculation Principle and Methodsmentioning

confidence: 99%

First-principles study on the stability of Cd passivates in soil

Shen

Li²,

Mao

et al. 2023

Preprint

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The stable existence of heavy metals in soil under natural conditions is the core issue in heavy metal pollution solidification and remediation technology. This paper takes the common heavy metal ion Cd2+ as an example to analyze the stability of the combination of heavy metal ions and common ion groups in soil. The stability and existing form of Cd are analyzed by using the first principle, and the free energy, band structure, and partical density of states (PDOS) of CdCO3, CdSO4, CdCl2, CdSiO3 are calculated. Determine the stability of Cd binding to common anions in soil. The results show that the order of structural stability of cadmium compounds from high to low is CdSiO3, CdSO4, CdCO3, CdCl2. SO42−, and SiO32− can be used as preferred functional groups for cadmium pollution passivation. Anhydrous sodium sulfate and sodium silicate are effective passivator.

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“…In this study, the application of amendments decreased soil mobility and bioavailability compared to the control treatment. The main reason for this may be attributable to the increase of soil pH, which can promote the formation of hydroxide or carbonate precipitation and increase the negative charges of variably charged colloids, resulting in enhanced adsorption of Cd 2+ and Pb 2+ in soils [40][41][42]. In addition, hydroxyapatite can immobilize heavy metals by ion exchange and substitution of Ca by other metals during recrystallization (coprecipitation) [16,43].…”

Section: Effects Of Simulated Acid Rain and Amendments On The Distrib...mentioning

confidence: 99%

Effects of Soil Amendments Applied on Cd and Pb Immobilization and Environmental Risks under Simulated Acid Rain

Zhang¹,

Li²,

Wang³

2022

Pol. J. Environ. Stud.

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A column leaching experiment was conducted to study the long-term remediation stability of hydroxyapatite, sepiolite, and biochar on soil Cd and Pb under simulated acid rain. The results indicated that simulated acid rain reduced soil pH and facilitated the conversion of residual fractions of Cd and Pb to acid-soluble fractions, thus increasing solubility, mobility, and availability of soil Cd and Pb. Lower leachate Cd and Pb contents were found in hydroxyapatite-treated soil than were found in sepiolite and biochar-treated soils. Meanwhile, Cd and Pb concentrations in hydroxyapatite met grade IV (Cd≤0.01 mg L -1 , Pb≤0.1 mg L -1 ) at the end of leaching (48 weeks), according to the Environmental quality standards for groundwater in China (GB14848-93). The application of hydroxyapatite, sepiolite, and biochar effectively immobilized Cd and Pb in both the water and simulated acid rain treatments. The immobilization efficiencies of Cd treated by hydroxyapatite, sepiolite, and biochar were 37.97~43.55%, 21.52~25.81%, and 26.58~33.87%, respectively, after the long-term leaching experiment. For Pb, these values were 36.35~48.65%, 24.90~29.26%, and 20.91~22.41%, respectively. Hydroxyapatite has better immobilization efficiency and maintains stronger and more durable stability than sepiolite and biochar. Therefore, hydroxyapatite is recommended to use in the remediation of Cd and Pb-contaminated agricultural soils under the condition of soil acidification.

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Effects of Soil Properties and Land Use Types on the Bioaccessibility of Cd, Pb, Cr, and Cu in Dongguan City, China

Cited by 22 publications

References 28 publications

Quantitative analysis of ecological risk and human health risk of potentially toxic elements in farmland soil using the PMF model

Quantitative analysis of ecological risk and human health risk of potentially toxic elements in farmland soil using the PMF model

First-principles study on the stability of Cd passivates in soil

Effects of Soil Amendments Applied on Cd and Pb Immobilization and Environmental Risks under Simulated Acid Rain

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