Fluorescing Layered Double Hydroxides as Tracer Materials for Particle Injection during Subsurface Water Remediation

Dietmann, Karen Maria; Linke, Tobias; Reischer, Markus; Rives, V.

doi:10.3390/chemengineering4030053

Cited by 5 publications

(4 citation statements)

References 52 publications

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“…For a new set of We also demonstrated the successful use of the same esterification reaction carried out in a DMF/LiCl system with dextran and 4-chlorobenzoyl chloride (Scheme 3). 1 H and 13 C NMR spectra display the broad peaks corresponding to aromatic protons at 7.09−8.39 ppm and the broad peaks arising from the ester carbonyl carbon at 164.1 and 164.6 ppm (Figure S5 in the Supporting Information). As shown in Figure 2, the FTIR-ATR spectrum confirms the substitution of the −OH groups by the significantly reduced −OH absorptions compared to those of dextran.…”

Section: Synthesis and Characterization Of Starch Andmentioning

confidence: 99%

“…Starch (soluble, ACS reagent) and dextran from Leuconostoc mesenteroides (average molecular weight 150,000) were purchased from Sigma Aldrich and used as received. 1 H and 13 C NMR spectra were obtained on a Bruker AVANCE III 500 MHz spectrometer in deuterated dimethyl sulfoxide (DMSO-d 6 ) or D 2 O at room temperature with 1600 and 15,000 scans, respectively. Chemical shifts are reported relative to the solvent peaks.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Tracers or markers, when used in subsurface applications, such as groundwater tracing or interwell mapping in oil and gas reservoirs, can provide valuable information about underground fluid distributions, fluid continuity, and fluid-flow paths. Groundwater tracers, for example, help monitor the remediation of contaminated water; interwell tracers map the complexity of subterranean fluid pathways and aid in the characterization of residual oil saturation for improved oil recovery. − Tracers for tagging mineral samples recovered from subsurface operations during exploration and production have helped to provide valuable petrophysical information and lithology data for precisely locating hydrocarbons and characterizing oil and gas reservoirs. ,, …”

Section: Introductionmentioning

confidence: 99%

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Functionalized Polysaccharides as Transient Markers for Subsurface Monitoring

et al. 2022

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Tracers, or ″markers″, have extensive applications in monitoring the subsurface and environment. Oil and gas fields apply a series of molecular tracers for interwell monitoring to support reservoir management. In near wellbore applications, tracers help to identify zonal flow allocation. Continuous monitoring using a series of different tracers is particularly appealing for mud logging operations that require precise and real-time assessment of the formation. Mineral particles (cuttings), generated during drilling, can provide valuable petrophysical and lithological information about the formation. In recent studies, polymeric nanoparticles (tracers) have shown promising results in labeling the cuttings at the depth of their origin. However, nondegradable tracers, such as polymeric nanoparticles, accumulate in the downhole/drilling fluids during continuous operation, which increase background noise at the time of detection and therefore reduce the detectability of the tracers over time. Thus, the application of a tracer-based technology demands the development of many different costly tracers to overcome the background noise in detection caused by tracer accumulation. Here we present the development of the first generation of transient markers that perform their ″marker″ function for a short period of time before degrading to undetectable molecules in the environment. These markers are conjugates of inexpensive polysaccharides with aromatic halides (tracers), which are synthesized via a simple esterification method. We have demonstrated that these markers can label mineral particles and then release the tracer molecules during pyrolysis-GCMS (Py-GCMS) analysis. The Py-GCMS results show distinct retention times and mass patterns that unambiguously identify the marker on the mineral particles. Additionally, we have characterized the hydrolysis of the marker at elevated temperatures in basic fluids using NMR, double-shot Py-GCMS analysis, and HPLC and determined the first-order rate constant of the marker’s hydrolysis using quantitative Py-GCMS analysis. The results have demonstrated the potential for the transient application of these markers in subsurface environments.

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Section: Synthesis and Characterization Of Starch Andmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Functionalized Polysaccharides as Transient Markers for Subsurface Monitoring

et al. 2022

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“…A wide variety of organic contaminants [49,130,131], such as pharmaceutical compounds, and inorganic pollutants [132][133][134][135], such as arsenic, chromate or vanadate and other emerging contaminants, have been removed from wastewater. Recently, Alonso-de-Linaje et al [136,137] and Dietmann et al [138][139][140] have used LDHs like groundwater remediators in wells in Denmark to remove chlorinated compounds, like tetrachloroethylene (PCE), trichloroethene (TCE) 1,1,2-trichloroethane (1,1,2-TCA), tetrachloromethane (CT) and trichloromethane (TCM). Furthermore, Alonso-de-Linaje et al [131] have studied the sorption capacity of LDHs for Poly-and perfluoroalkyl substances (PFAS), like perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA), also organic contaminants in groundwater.…”

Section: I25 Applicationsmentioning

confidence: 99%

Nanorrellenos inorgánicos preparados a partir de LDHS para la obtención de nanocomposites de matriz polimérica. Determinación de la incidencia del método de preparación sobre sus propiedades

Gallego¹

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The present research work has focused on obtaining inorganic nanofillers from Layered Double Hydroxides (LDHs) that can be useful in the preparation of polymer matrix composites and nanocomposites with modified properties. The properties of this type of nanofillers are closely linked to their synthesis conditions; so, parameters such as pH, reaction medium, molar ratio of cations, precipitation rate, synthesis temperature and hydrothermal treatments, etc., have an important impact on the physical and surface properties of the final solids. Thus, in the present work, the synthesis of Zn,Al LDHs with molar ratios 2:1 and 3:1 has been carried out by the coprecipitation method using amines, which are softer bases than the classically used bases. Specifically, amines with different substitution degree and chain length have been used as precipitating agents using a simpler synthesis methodology than the hydrolysis of urea. The resulting solids have been characterised in terms of their morphological and structural properties and their feasibility for use as nanofillers in polymer matrix nanocomposites has been studied. Thus, nanocomposites have been prepared using polypropylene as polymeric matrix, dispersing Zn,Al LDHs synthesised under different conditions. Finally, the impact of the use of these solids as nanofillers on the thermal stability and mechanical properties of the resulting nanocomposites was studied.On the other hand, the synthesis methodology using amines as precipitating agents was extended to the preparation of Ni,Al LDHs which are of great interest as catalyst precursors in the Sabatier reaction of CO2 hydrogenation to obtain methane. The synthesis of this type of solids was carried out using dimethylamine as precipitating agent, since the formation of coordination compounds with Ni(II) was not observed and, in addition, it turned out to be the amine with which the Zn,Al LDHs offered the best properties, in terms of crystallinity degree and particle size distribution. The study of the catalytic activity of this type of solids was extended with the synthesis of catalysts promoted by cations of rare earth elements, such as Ce and La. Thus, the effectiveness of the resulting Ni-Al2O3, Ni-Ce2O3-Al2O3 and Ni-La2O3-Al2O3-Al2O3 catalysts was studied in the production of CH4, taking into account both the conversion and the selectivity towards secondary products. The catalytic test was carried out between 200 and 400 ºC, and it was observed that at 275 ºC a conversion larger than 60% was achieved, maintained up to 400 ºC, with a selectivity of 95% in methane production.

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