Using Ca3(PO4)2 nanoparticles to reduce metal mobility in shooting range soils

Arenas-Lago, Daniel; Rodríguez-Seijo, Andrés; Lago-Vila, Manoel; Couce, L. Andrade; Vega, F.A.

doi:10.1016/j.scitotenv.2016.07.108

Cited by 18 publications

(4 citation statements)

References 46 publications

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“…Compared to FA-treated soils, all MFAtreated soils significantly decreased CaCl2-extractable Pb and Cu by 25-97.1% and 13.5-75%, respectively. Arenas et al [49] indicated that amorphous Ca3(PO4)2 exhibits a notable adsorption effect for heavy metals. Although the phosphate minerals (Ca3(PO4)2) were not Moreover, the CaCl 2 -extractable Pb and Cu were significantly decreased with the increasing dosages of FA and MFA (Figure 4B,C).…”

Section: Soil Ph Cacl2-extractable and Chemical Speciation Of Pb And Cumentioning

confidence: 99%

“…Compared to FA-treated soils, all MFA-treated soils significantly decreased CaCl 2 -extractable Pb and Cu by 25-97.1% and 13.5-75%, respectively. Arenas et al [49] indicated that amorphous Ca 3 (PO 4 ) 2 exhibits a notable adsorption effect for heavy metals. Although the phosphate minerals (Ca 3 (PO 4 ) 2 ) were not identified in MFA by XRD, the immobilization efficiencies of Pb and Cu by MFA were higher than that of FA and the other alkline modification FA reported by previous studies [15,50,51].…”

Section: Soil Ph Cacl2-extractable and Chemical Speciation Of Pb And Cumentioning

confidence: 99%

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Impacts of Modified Fly Ash on Soil Available Lead and Copper and Their Accumulation by Ryegrass

Cui,

Sheng,

et al. 2023

Agronomy

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Fly ash (FA) is promising for environmental remediation, but how to modify the FA with high remediation efficiency through an environmentally friendly and low-cost modification method is scare. A modified FA (MFA) was prepared through a one-step hydrothermal modification with Ca(OH)2 and KH2PO4. Results indicated that irregular agglomerates occurred on the surface of the MFA and that the specific surface area increased by 1.94 times compared to that of FA. Compared to FA, glassy compositions in MFA were destroyed and amorphous Si/Al and alkaline aluminosilicate gels were formed. The soil application of 0.2–0.6% MFA significantly increased soil pH by 0.23–0.86 units compared to FA and decreased available lead (Pb) and copper (Cu) by 25–97.1% and 13.5–75%, respectively. MFA significantly decreased exchangeable Pb and Cu by 12.5–32% and 11.4–35.2%, respectively, compared to FA. This may be due to the high pH and specific surface area of MFA, which promoted to the formation of amorphous Si/Al, metal–phosphate precipitation, and complexation with functional groups. In addition, MFA slightly increased the biomass of shoots and roots and decreased the uptake of Pb and Cu by ryegrass. This study provides a new modification method for the utilization of FA in the heavy metal-contaminated soils.

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Section: Soil Ph Cacl2-extractable and Chemical Speciation Of Pb And Cumentioning

confidence: 99%

Section: Soil Ph Cacl2-extractable and Chemical Speciation Of Pb And Cumentioning

confidence: 99%

Impacts of Modified Fly Ash on Soil Available Lead and Copper and Their Accumulation by Ryegrass

Cui,

Sheng,

et al. 2023

Agronomy

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“…The intended alteration of metal (Pb) bioavailability by the addition of chemical amendments represents an effective means of mitigating environmental risks without the high costs usually associated with unsustainable traditional remediation strategies [28]. Contaminated shooting range soils have been mainly treated with a variety of inorganic amendments (Table 1), which can be either synthetic or mined materials, such as phosphates [36][37][38][39][40][41][42], lime-based compounds [43,44], and metal oxides [24,37,45], in order to induce specific reactions within the soil components to render Pb inert without substantially affecting soil properties [28]. The chemical reactions involved in Pb immobilization by the abovementioned amendments are summarized in Table 2.…”

Section: Introductionmentioning

confidence: 99%

Recent Trends in Sustainable Remediation of Pb-Contaminated Shooting Range Soils: Rethinking Waste Management within a Circular Economy

Gómez-Sagasti

Anza²,

Hidalgo³

et al. 2021

Processes

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Soil metal contamination in recreational shooting ranges represents a widespread environmental problem. Lead (Pb) is the primary component of traditional ammunition, followed by metalloids such as antimony (Sb) and arsenic (As). Lead-based bullets and pellets deposited on the soil surface are subject to steady weathering; hence, metal(loid)s are released and accumulated in the underlying soil, with potential adverse consequences for ecosystem function and human health. Amongst the currently available environmentally-safe technologies for the remediation of metal-contaminated soils, chemical immobilization is recognized as the most practical and cost-effective one. This technology often uses inorganic and organic amendments to reduce metal mobility, bioavailability and toxicity (environmental benefits). Likewise, amendments may also promote and speed up the re-establishment of vegetation on metal-affected soils, thus facilitating the conversion of abandoned shooting ranges into public green spaces (social benefit). In line with this, the circular economy paradigm calls for a more sustainable waste management, for instance, by recycling and reusing by-products and wastes in an attempt to reduce the demand for raw materials (economic benefit). The objective of this manuscript is to present a state-of-the-art review of the different industrial and agro-food by-products and wastes used for the remediation of metal-contaminated shooting range soils.

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“…It also offers an advantage over other traditional methods due to the small particle size, larger specific surface area and easy distribution in the soil. The nanomaterials are able to immobilize the labile fractions of potentially hazardous elements in the soil solution, resulting in reduced mobility and availability of toxic metals to plants in the metal-contaminated soils 17 . The antimicrobial activity of metal nanoparticles has received marked global attention as they specifically exhibit significant toxicity to microbes 18,19 .…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Zinc Oxide Nanoparticles by Pseudomonas aeruginosa and their Broad-Spectrum Antimicrobial Effects

Barsainya¹,

Singh²

2018

J Pure Appl Microbiol

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The present work highlights a low-cost, ecofriendly and simple procedure for the synthesis of zinc oxide nanoparticles (ZnONPs), mediated by extracellular secondary metabolite pyoverdine -a siderophore produced by Pseudomonas aeruginosa. The in vitro bio-reduction of zinc nitrate into ZnONPs in the presence of siderophore pyoverdine was ascertained by UV-visible spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy and transmission electron microscopy (TEM) analysis. The synthesized ZnONPs were distinguished by a characteristic absorption peak at 416 nm in the UV-visible range. The TEM pictures of ZnONPs showed pseudospherical morphology, with particle size ranging between 50 and 100 nm. X-ray diffraction peaks obtained at 31.73°, 34.37°, 36.24°, 47.40°, 56.68°, 63.0° and 67.8° corresponding to the lattice plane of [100], [002], [101], [102], [110], [103] and [112] suggested the polycrystalline wurtzite structure of the nanoparticle. The ZnONPs were found to have an antibacterial effect against Gram-positive bacteria (Staphylococcus aureus and Bacillus sp.) and Gram-negative bacteria (Escherichia coli), and also showed a fungicidal effect against phytopathogenic fungi such as Rhizoctonia solani, Fusarium sp. and Penicillium sp. The present approach of using exogenously produced bacterial siderophore offers a unique in vitro green method of synthesizing ZnONPs, where a direct contact between the toxic metal and biological resource material can be avoided.

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Using Ca3(PO4)2 nanoparticles to reduce metal mobility in shooting range soils

Cited by 18 publications

References 46 publications

Impacts of Modified Fly Ash on Soil Available Lead and Copper and Their Accumulation by Ryegrass

Impacts of Modified Fly Ash on Soil Available Lead and Copper and Their Accumulation by Ryegrass

Recent Trends in Sustainable Remediation of Pb-Contaminated Shooting Range Soils: Rethinking Waste Management within a Circular Economy

Green Synthesis of Zinc Oxide Nanoparticles by Pseudomonas aeruginosa and their Broad-Spectrum Antimicrobial Effects

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