Hydroxyl-Stretching Bands in Curve-Fitted Micro-Raman, Photoacoustic and Transmission Infrared Spectra of Dickite from St. Claire, Pennsylvania

Shoval, S.; Yariv, S.; Michaelian, K.; Boudeulle, M.; Panczer, G.

doi:10.1346/ccmn.2001.0490408

Cited by 21 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It may be used as excellent filler, especially barrier filler because of its layer structure. In recent years, main researches about dickite were paid to several aspects as followed: hydroxyl‐stretching mode,14–17 thermal behavior,18–21 adsorption,22–25 and intercalation18, 20, 21, 26 of organic molecule. In addition, the formation,27, 28 distribution,29–31 and mineralogy character32 of dickite were also studied.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic modification of dickite and salt spray test study on LLDPE/modified dickite composite

Xue¹,

Jiang²,

Li³

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

Dickite particles were modified by silane coupling agent, hexadecyl phosphate, oleic acid, and stearic acid (SA), respectively. Modified dickite was composed with linear low-density polyethylene (LLDPE) to prepare a series of LLDPE/modified dickite composites. Hydrophilicity of modified dickite was characterized by dispersion experiments and contact angle tests. The results indicated that hydrophilicity of modified dickite decreases sharply, compared with nonmodified dickite. Among four modifying agents, SA had obvious effect on hydrophobic modification of dickite. Fourier-transform infrared spectra results suggested that chemical bonding between modifying agent and dickite was beneficial to the hydrophobic modification. Results of salt spray tests illustrated that the introduction of modified dickite into LLDPE improved the anticorrosion properties of the polymer universally. The anticorrosion mechanism of LLDPE/modified dickite was analyzed by scanning electron microscope micrograph. The mechanical properties of the resultant composites displayed a fact of reinforcement of modified dickite.

show abstract

Section: Introductionmentioning

confidence: 99%

Hydrophobic modification of dickite and salt spray test study on LLDPE/modified dickite composite

Xue¹,

Jiang²,

Li³

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…'Chromeleon ' [Dionex Corporation, 2001], 'PyMS' [O'Callaghan et al, 2012] and 'AMDIS' [Nair et al, 2013]), although research has shown that the larger amount of available processing options can often be misleading resulting in inadequately processed signals [e.g. Shoval, 2001;Fagan, 2011;de la Mata et al, 2012;Zhou, 2013;Giovanelli, 2014]. For more targeted data processing, custom made data processing has been developed that based on assessment of the nature of signal and noise [e.g.…”

Section: Noise Reduction/removal Involving Software Adjustmentsmentioning

confidence: 99%

“…For more targeted data processing, custom made data processing has been developed that based on assessment of the nature of signal and noise [e.g. Shoval, 2001;Fagan, 2011;de la Mata et al, 2012;Zhou, 2013;Giovanelli, 2014]. These custom made tools make use of signal filtering to reduce the effect of background noise on the analyte signal.…”

Section: Noise Reduction/removal Involving Software Adjustmentsmentioning

confidence: 99%

Characterization of Groundwater with Complementary Age Tracers

Beyer¹

View full text Add to dashboard Cite

<p>Groundwater age or residence time is the time water has resided in the subsurface since recharge. Depending on the application, this definition may or may not include travel through the unsaturated zone. The determination of groundwater age can aid understanding and characterization of groundwater resources, because it can provide information on e.g. groundwater mixing and flow, and volumes of groundwater and recharge. Groundwater age can be inferred from environmental tracers, such as SF₆ and tritium, that have a known input to groundwater and/or undergo known alteration processes in groundwater. The currently used age tracers face limitations regarding their application range and reliability. For example, some age tracers have local sources that can lead to contamination of groundwater. This contamination can result in misleading estimates of age. Other tracers have ambiguous inputs to groundwater, which can result in ambiguous age estimations. To reduce these limitations, it is now recognized that multiple tracers should be applied complementarily. There is also a need for new groundwater age tracers and/or new groundwater dating techniques to supplement the existing ones. Cost-effective and easily applicable tracers/techniques are preferred, since most established groundwater dating techniques are very costly and/or complex. Commonly measured hydrochemistry parameters , such as the concentrations of major ions and pH, have been suggested as cost-effective and easily determinable potential age tracers. To date, the use of commonly measured hydrochemistry parameters as independent age tracer has only been demonstrated for water recharged weeks to months ago relying on seasonal changes. Other studies applied commonly measured hydrochemistry complementarily to established age tracers to better constrain groundwater age and/or better understand and predict anthropogenic effects on groundwater quality. Further study is needed to assess the extent to which commonly measured hydrochemistry can be used to reduce uncertainty in tracer-inferred age as well as the extent to which commonly measured hydrochemistry can be used to extrapolate tracer-inferred age. In addition to tracer specific limitations, quantification of uncertainty and ambiguity is not standard in age modelling. Although a few studies have attempted to quantify uncertainty in age modelling with the aid of probabilistic approaches, their methods are often relatively complex and not transferrable to the many cases with little available data. Uncertainties in the tracer’s recharge estimate and identification of appropriate model components, such as the objective function, have not been considered. Studies in other areas of hydrological modelling, where probabilistic approaches are more commonly used, have highlighted the need for careful identification of model components.</p>

show abstract

Applications

2010

Photoacoustic IR Spectroscopy

View full text Add to dashboard Cite

Hydroxyl-Stretching Bands in Curve-Fitted Micro-Raman, Photoacoustic and Transmission Infrared Spectra of Dickite from St. Claire, Pennsylvania

Cited by 21 publications

References 26 publications

Hydrophobic modification of dickite and salt spray test study on LLDPE/modified dickite composite

Hydrophobic modification of dickite and salt spray test study on LLDPE/modified dickite composite

Characterization of Groundwater with Complementary Age Tracers

Applications

Contact Info

Product

Resources

About