Consecutive thermal and wet conditioning treatments of sedimentary stabilized cementitious materials from HPSS® technology: Effects on leaching and microstructure

Calgaro, Loris; Badetti, Elena; Bonetto, Alessandro; Contessi, Silvia; Pellay, Roberto; Ferrari, Giorgio; Artioli, Gilberto; Marcomini, Antonio

doi:10.1016/j.jenvman.2019.109503

Cited by 9 publications

(11 citation statements)

References 13 publications

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“…During thermal destructive processes, some amounts of metal are chemically incorporated into the glass structure in the form of oxides or other substances, and other metal components are separated and recycled for reuse [ 92 ]. Thermal-chemical approaches like Cement-lock ® , Novosol ® , and HPSS ® technology are widely applied ( Table 4 ) [ 113 , 114 , 133 ]. The thermoplastic polymer process uses the property of thermoplastic polymers to become flowing when heated and solid when cooled to encapsulate contaminants.…”

Section: Ex Situ Remediation Technologymentioning

confidence: 99%

Recent Progress on Ex Situ Remediation Technology and Resource Utilization for Heavy Metal Contaminated Sediment

2023

Toxics

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Sediment is an important part of aquatic systems, which plays a vital role in transporting and storing metals. Due to its abundance, persistence, and environmental toxicity, heavy metal pollution has always been one of the hot spots in the world. In this article, the state-of-art ex situ remediation technology for metal-contaminated sediments is elaborated, including sediment washing, electrokinetic remediation (EKR), chemical extraction, biological treatment, as well as encapsulating pollutants by adding some stabilized/solidified materials. Furthermore, the progress of sustainable resource utilization methods, such as ecosystem restoration, construction materials (e.g., materials fill materials, partition blocks, and paving blocks), and agriculture use are reviewed in detail. Finally, the pros and cons of each technique are summarized. This information will provide the scientific basis for selecting the appropriate remediation technology in a particular scenario.

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Section: Ex Situ Remediation Technologymentioning

confidence: 99%

Recent Progress on Ex Situ Remediation Technology and Resource Utilization for Heavy Metal Contaminated Sediment

2023

Toxics

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“…Aliquots of about 10 mg of homogenized soil were digested, by means of a mixture of 3 ml of aqua regia (1:3 HCl: HNO 3 ), 5 ml of ultrapure water, and 0.5 ml of 48% hydrofluoric acid (HF) solution, in a sealed PFA vessel using an Ethos 1600 microwave oven (Milestone). After the digestion, 1 ml of a saturated B(OH) 3 solution was added to each sample to neutralize the remaining HF (Calgaro et al, 2019). ICP-MS was used in standard, reaction (dynamic reaction cell), and collision (kinetic energy discrimination) mode, based on the severity of polyatomic interferences, to obtain the lowest detection limit for each element (information on reagents and instrument settings is reported in the Supporting Information Material S1).…”

Section: Sampling Sample Preparation and Analysismentioning

confidence: 99%

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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“…They were able to determine the maximum amount of dredged cement that can be used before the mortar started to lose its self-compacting properties. Sediments from the Mincio River (Italy) containing hydrocarbons and Hg were subjected to thermal desorption and wet conditioning (Calgaro et al, 2019). Results showed that the treatment resulted in reductions in contaminant leaching and improved mechanical properties and granule quality.…”

Section: Risk Evaluationsmentioning

confidence: 99%

Contaminated aquatic sediments

Jaglal¹

2020

Water Environment Research

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Jawed and Krantzberg (2019) identified best practices to follow when remediating sediment sites based on experience gained at the Randle Reef Site in Ontario, Canada. The authors identify a list of challenges to overcome that fall under a broad series of headings that include issues associated with social, regulatory, political, and technical topics. Bianchini, Cento, Guzzini, Pellegrini, and Saccani (2019) reviewed more than 150 historical articles, written over the previous 50 years, to identify alternative

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Consecutive thermal and wet conditioning treatments of sedimentary stabilized cementitious materials from HPSS® technology: Effects on leaching and microstructure

Cited by 9 publications

References 13 publications

Recent Progress on Ex Situ Remediation Technology and Resource Utilization for Heavy Metal Contaminated Sediment

Recent Progress on Ex Situ Remediation Technology and Resource Utilization for Heavy Metal Contaminated Sediment

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

Contaminated aquatic sediments

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