Cement-stabilized contaminated soil: Understanding Pb retention with XANES and Raman spectroscopy

Contessi, Silvia; Dalconi, Maria Chiara; Pollastri, Simone; Calgaro, Loris; Meneghini, Carlo; Ferrari, Giorgio; Marcomini, Antonio; Artioli, Gilberto

doi:10.1016/j.scitotenv.2020.141826

Cited by 32 publications

(16 citation statements)

References 57 publications

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“…Previous works (Calgaro et al, 2021; Contessi, Calgaro, et al, 2020; Contessi, Dalconi, et al, 2020) highlighted the presence of serious heavy metals' contamination in the industrial site of Bagnolo Mella located in Italy. In some detail, a soil sample was collected from the surface of a selected area to 1.5‐m depth, showing both heavy metals' content (i.e., Pb, As, Se, Hg, and Sb), exceeding the Italian regulations for industrial use of soils and sediments (EMD, 2006), and the presence of mineralogical phases derived from anthropogenic activities (i.e., gypsum, anglesite, lithargite, jarosite, hematite, and amorphous iron oxides).…”

Section: Resultsmentioning

confidence: 95%

“…There is an agrarian consortium producing fertilizers near the SW border of the City, close to various smelting and steel manufacturing plants. The site includes installations dedicated to different industrial activities, from sulfuric acid production through pyrite roasting (lead chambers process) to fuel and mineral oil storage (Calgaro et al, 2021; Contessi, Calgaro, et al, 2020; Contessi, Dalconi, et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

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A multitechnique approach for the identification of multiple contamination sources near a polluted industrial site

et al. 2022

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Degraded land requires rapid and suitable remedial actions, thus appropriate and fast methodological approaches for estimating the spatial distribution of contaminants are needed. In this context, a methodological approach combining isotopic measurements, heavy metals concentrations mapping, X‐ray diffraction, and cluster analysis, was applied to characterize a polluted industrial site where the contamination due to improper waste disposal could have spread also into the surrounding fields. This approach was applied to a set of representative topsoil (from 15 to 30 cm depth) and subsoil (from 130 to 150 cm depth) samples, selected either inside or outside the contaminated site. The X‐ray diffraction analysis highlighted that only the mineralogy of the subsoil below the buried waste was noticeably altered, while the concentration mapping highlighted that the levels of several heavy metals on the edge of the contaminated site, at both depths, were very similar to those found in the samples from the outside. Based on these findings, Pb was used as a tracer for heavy metal pollution by its stable isotopes' analysis. The cluster analysis of the isotopic measurements revealed that only the contamination detected inside the industrial site could be attributed to the pollutants migration from the buried waste. Conversely, the contaminants concentrations found in the topsoil samples taken outside the site could be ascribed to contamination sources other than the polluted waste present inside the site.

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Section: Resultsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

A multitechnique approach for the identification of multiple contamination sources near a polluted industrial site

et al. 2022

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“…Pb(II) is hard to migrate and degrade, which have become an important cause of Pb(II) pollution in soil, water, air, and many other places. [5][6][7][8][9][10][11][12][13] Lead (II) exists in the environment will eventually be transmitted to plants and the human body through the food chain, [14][15][16][17][18][19] causing damage to organs [20] and hormone levels. [21] For children, a very small amount of Pb(II) may inhibit their brain development, [22] break their bones, [23] even damage their DNA.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence ‘off–on’ probe for lead (II) detection based on Atractylodes III CQDs and bioimaging

et al. 2022

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In this work, a type of carbon quantum dots (CQDs) with bright blue emission was readily fabricated through one-step hydrothermal treatment from Atractylodes III.We explored the surface morphology and optical properties of the CQDs using transmission electron microscopy, X-ray diffraction patterns, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and ultraviolet-visible light spectrophotometry. The obtained CQDs possessed good photoluminescence properties, water solubility, and biocompatibility. The fluorescence quantum yield of these was 3.72%. It was found that the fluorescence intensity of CQDs was quenched by picric acid. After adding lead (II), the fluorescence could be effectively recovered.Therefore, an 'off-on' fluorescence probe was designed to detect lead (II) in the range 0-580 μM and the limit of detection was 0.068 μM. In addition, the experiments showed that the CQDs could be successfully used in bioimaging and as a hidden fluorescent ink.

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“…Semi-rigid base has been widely used for road engineering due to its higher strength, better loading distribution and excellent wholeness for decades, the main materials of which generally include cement-stabilized macadam (CSM), lime-fly ash stabilized macadam, cement-fly ash stabilized macadam and lime stabilized macadam, etc. [17,18]. The semirigid base is becoming the predominant type of base and subbase for highways and urban roads, especially in China [19].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties, Durability and Leaching Toxicity of Cement-Stabilized Macadam Incorporating Reclaimed Clay Bricks as Fine Aggregate

Zhang¹,

Wang

et al. 2022

Sustainability

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The utilization of reclaimed clay brick (RCB) from construction and demolition (C&D) waste is an extremely troublesome problem, which is beneficial and necessary for environmental protection and resource conservation. The objective of this study is to evaluate the mechanical properties, durability and environmental impact of cement-stabilized macadam (CSM) incorporating RCB. The physical and chemical properties of RCB were characterized by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) technologies. RCB exhibited a porous surface micro-morphology, high water absorption and pozzolanic activity. The higher RCB substitution ratio resulted in a lower unconfined compressive strength of CSM. Meanwhile, the higher the RCB substitution ratio was, the larger the 90 d indirect tensile strength of CSM at the late curing period. The RCB substitution ratio within 50% was beneficial for the freeze-thaw resistance of CSM. Additionally, RCB had a smaller aggregate size, causing a negative influence on the anti-scouring property of CSM. CSM incorporating RCB had an overall increasing accumulative water loss rate, and average coefficients of dry shrinkage and temperature shrinkage, except that 20% RCB substitution ratio resulted in an excellent dry shrinkage property. Based on the chemical analysis of EDTA-2Na, the pozzolanic RCB reacted mainly at later curing to form the crystal structure, enhancing the interfacial transition zone. Additionally, the leaching solutions could meet the identification requirements for extraction toxicity, surface water and groundwater referring to Chinese standards. Utilizing RCB in road engineering as the substitute for natural aggregate would be a promising step forward to sustainable development and green construction.

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Cement-stabilized contaminated soil: Understanding Pb retention with XANES and Raman spectroscopy

Cited by 32 publications

References 57 publications

A multitechnique approach for the identification of multiple contamination sources near a polluted industrial site

A multitechnique approach for the identification of multiple contamination sources near a polluted industrial site

Fluorescence ‘off–on’ probe for lead (II) detection based on Atractylodes III CQDs and bioimaging

Mechanical Properties, Durability and Leaching Toxicity of Cement-Stabilized Macadam Incorporating Reclaimed Clay Bricks as Fine Aggregate

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