Carbonate-bound Pb percentage distribution in agricultural soil and its toxicity: Impact on plant growth, nutrient cycling, soil enzymes, and functional genes

Feng, Lu; Gao, Zhelu; Ma, Hui; He, Shufei; Liu, Yu; Jiang, Junqiu; Zhao, Qingliang; Wei, Liangliang

doi:10.1016/j.jhazmat.2023.131205

Cited by 10 publications

(4 citation statements)

References 46 publications

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“…Pb is considered a toxic element to the ecosystem and organisms when present in the soil environment 24,25,26 . The study area is currently home to a lead‐zinc mine, 27 so it is important to determine the geochemical background concentration of Pb element, which is the basis for environmental impact assessments, water quality impacts, biological impacts, and human health.…”

Section: Resultsmentioning

confidence: 99%

“…Pb is considered a toxic element to the ecosystem and organisms when present in the soil environment. 24,25,26 The study area is currently home to a lead-zinc mine, 27 so it is important to determine the geochemical background concentration of Pb element, which is the basis for environmental impact assessments, water quality impacts, biological impacts, and human health. The geochemical background concentration of Pb element in soil in the study area calculated using the 4δ-outlier test and 2δ-technique methods are 93.86 and 50.7 mg kg −1 , respectively, which are much higher than those in other regions of the world, specifically: Pb concentration in soil is 27.9 mg kg −1 , 21 37.5 mg kg −1 .…”

Section: Leadmentioning

confidence: 99%

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Using iterative 2δ‐technique and 4δ‐outlier test for evaluating the geochemical background concentrations of trace elements in topsoil at Cao Bang province, Vietnam

Tran,

Nguyen,

Dang

et al. 2024

Vietnam Journal of Chemistry

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This study investigated the geochemical background values for seven trace elements in topsoil samples collected from highland areas within Cao Bang province, Vietnam. Total concentrations of these elements were determined, revealing the following order of mean concentration: Zn > Cr > Pb > Cu > As > Ni > Co. The background values were calculated using two different methods including iterative 2δ‐technique and 4δ‐outlier test. The 4δ‐outlier test yielded the following background concentrations (dry weight) for the seven elements: As (24.41 ± 12.42 mg kg−1), Co (15.64 ± 10.57 mg kg−1), Cr (49.31 ± 33.41 mg kg−1), Cu (29.77 ± 27.14 mg kg−1), Ni (22.52 ± 13.33 mg kg−1), Pb (38.06 ± 31.48 mg kg−1), Zn (71.79 61.09 mg kg−1). The 2δ‐technique, on the other hand, resulted in the following background concentrations (dry weight) for the same elements: As (8.41 ± 8.57 mg kg−1), Co (5.06 ± 4.31 mg kg−1), Cr (26.72 ± 26.20 mg kg−1), Cu (25.31 ± 24.81 mg kg−1), Ni (8.02 ± 7.83 mg kg−1), Pb (28.12 ± 27.58 mg kg−1), Zn (51.91 ± 49.44 mg kg−1). These results provide valuable baseline data for future environmental assessments and monitoring programs in the region. They also highlight the potential impact of human activities, such as mining, on the geochemical landscape of highland areas.

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Section: Resultsmentioning

confidence: 99%

Section: Leadmentioning

confidence: 99%

Using iterative 2δ‐technique and 4δ‐outlier test for evaluating the geochemical background concentrations of trace elements in topsoil at Cao Bang province, Vietnam

Tran,

Nguyen,

Dang

et al. 2024

Vietnam Journal of Chemistry

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“…Pb occurs in the bound state or as a free metal ion in soil and ultimately disrupts the microbiota of soil 6 , which enters the soil through several anthropogenic activities, including the use of fertilizers, explosives, paints, pesticides, and batteries 7 , 8 . In a nationwide survey of agricultural soils, Pb levels surpassed 1.5% of the standard limits set by the Chinese Ministry of Environmental Protection 9 . Le et al 10 reported a similar concern, noting that vegetable samples in the vicinity of a bus station exceeded the permitted limit for Pb contamination in Vietnam.…”

Section: Introductionmentioning

confidence: 92%

Silicon and iron nanoparticles protect rice against lead (Pb) stress by improving oxidative tolerance and minimizing Pb uptake

Ghouri,

Sarwar,

Sun

et al. 2024

Sci Rep

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Lead (Pb) is toxic to the development and growth of rice plants. Nanoparticles (NPs) have been considered one of the efficient remediation techniques to mitigate Pb stress in plants. Therefore, a study was carried out to examine the underlying mechanism of iron (Fe) and silicon (Si) nanoparticle-induced Pb toxicity alleviation in rice seedlings. Si–NPs (2.5 mM) and Fe-NPs (25 mg L−1) were applied alone and in combination to rice plants grown without (control; no Pb stress) and with (100 µM) Pb concentration. Our results revealed that Pb toxicity severely affected all rice growth-related traits, such as inhibited root fresh weight (42%), shoot length (24%), and chlorophyll b contents (26%). Moreover, a substantial amount of Pb was translocated to the above-ground parts of plants, which caused a disturbance in the antioxidative enzyme activities. However, the synergetic use of Fe- and Si–NPs reduced the Pb contents in the upper part of plants by 27%. It reduced the lethal impact of Pb on roots and shoots growth parameters by increasing shoot length (40%), shoot fresh weight (48%), and roots fresh weight (31%). Both Si and Fe–NPs synergistic application significantly elevated superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and glutathione (GSH) concentrations by 114%, 186%, 135%, and 151%, respectively, compared to plants subjected to Pb stress alone. The toxicity of Pb resulted in several cellular abnormalities and altered the expression levels of metal transporters and antioxidant genes. We conclude that the synergistic application of Si and Fe-NPs can be deemed favorable, environmentally promising, and cost-effective for reducing Pb deadliness in rice crops and reclaiming Pb-polluted soils.

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“…However, from the perspective of the distribution in Cu fractions, CB-Cu remained the dominant component in the soil after washing. This component carries a specific risk of release and can be easily absorbed and utilized by plants [36]. Therefore, it can be combined with other green stabilized materials or hyperaccumulators for synergistic restoration in the subsequent remediation process.…”

Section: Cu Distribution and Stability In The Soil After Washingmentioning

confidence: 99%

Enhancing Soil Remediation of Copper-Contaminated Soil through Washing with a Soluble Humic Substance and Chemical Reductant

Wang

Wei

et al. 2023

Agronomy

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The bioavailability and mobility of copper (Cu) in soil play a crucial role in its toxicity and impact on soil organisms. Humic substances, with their abundant functional groups and unique pore structure, have demonstrated the ability to effectively mitigate the toxic effects of heavy metals in soil. This study explores the potential of a soluble humic substance (HS) derived from leonardite for Cu removal from contaminated soils. The effects of various washing conditions, such as concentration and washing cycles, on removal efficiency were assessed. The results showed that a single washing with HS solution achieved an optimal removal efficiency of 37.5% for Cu in soil, with a subsequent reuse achieving a removal efficiency of over 30.5%. To further enhance Cu removal efficiency, a two-step soil washing approach using a chemical reductant NH2OH·HCl coupled with an HS solution (NH2OH·HCl + HS) was employed, resulting in an increased removal efficiency to 53.0%. Furthermore, this approach significantly reduced the plant availability and bioaccessibility of Cu by 13.6% and 11.4%, respectively. Compared to a single washing with NH2OH·HCl, both HS and NH2OH·HCl + HS increased the soil pH and organic matter content. These findings suggest that the two-step soil-washing approach using NH2OH·HCl + HS effectively removed Cu from polluted soil. This study demonstrates the potential of humic substances as environmentally friendly materials for remediating heavy metal-polluted soil, promoting green and sustainable applications in soil remediation practices.

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Carbonate-bound Pb percentage distribution in agricultural soil and its toxicity: Impact on plant growth, nutrient cycling, soil enzymes, and functional genes

Cited by 10 publications

References 46 publications

Using iterative 2δ‐technique and 4δ‐outlier test for evaluating the geochemical background concentrations of trace elements in topsoil at Cao Bang province, Vietnam

Using iterative 2δ‐technique and 4δ‐outlier test for evaluating the geochemical background concentrations of trace elements in topsoil at Cao Bang province, Vietnam

Silicon and iron nanoparticles protect rice against lead (Pb) stress by improving oxidative tolerance and minimizing Pb uptake

Enhancing Soil Remediation of Copper-Contaminated Soil through Washing with a Soluble Humic Substance and Chemical Reductant

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