spectroscopy Articles

  • Characterisation of a bioassay using the marine alga Dunaliella tertiolecta associated with spectroscopic (visible and infrared) detection

    This paper describes an ecotoxicological test using the alga Dunaliella tertiolecta associated with visible (VIS) and infrared (FTIR) spectroscopic detection. The estimation of toxicity is performed by measuring the cell density at 432 nm instead of 665 nm the results are comparable with those obtained by conventional visual or automatic estimation of celle density. FTIR spectroscopy gives an ...


    By Inderscience Publishers

  • Application of surface complexation models to anion adsorption by natural materials

    Various chemical models of ion adsorption will be presented and discussed. Chemical models, such as surface complexation models, provide a molecular description of anion adsorption reactions using an equilibrium approach. Two such models, the constant capacitance model and the triple layer model will be described. Characteristics common to all the surface complexation models are equilibrium ...


    By John Wiley & Sons, Ltd.

  • Microstructural study of thermally treated reactor pressure vessel steels using spectroscopic methods

    Positron annihilation spectroscopy (lifetime and Doppler broadening techniques), transmission Mössbauer spectroscopy, integral low-energy electron Mössbauer spectroscopy and transmission electron microscopy were applied to examine thermally treated reactor pressure vessel steels (RPV). The results of these methods obtained for different types of steels are discussed and correlated with hardness ...


    By Inderscience Publishers

  • Preparation of composite coagulant of PFM-PDMDAAC and its coagulation performance in treatment of landfill leachate

    A novel inorganic–organic composite coagulant, poly-ferric-magnesium (PFM) polydimethyldiallylammonium chloride (PDMDAAC), was prepared using FeSO4, MgSO4 and PDMDAAC as raw materials and was introduced to treat landfill leachate. The coagulation performance of the new reagent was evaluated and compared with those of other coagulants. The new reagent was characterized in terms of ...


    By IWA Publishing

  • Characterisation of the recalcitrant organic compounds in leachates formed during the anaerobic biodegradation of waste

    This study investigates the use of UV absorption and fluorescence spectroscopy to assess the early development of recalcitrant organic compounds in leachates formed during the anaerobic biodegradation of municipal solid waste. Biochemical methane potential tests were carried out on fresh waste (FW) and composted waste (CW) over a period of 150 days and leachates produced from the degradation of ...


    By IWA Publishing

  • Heterogeneous catalytic ozonation of hydroquinone using sewage sludge-derived carbonaceous catalysts

    This study converted sewage sludge into a carbonaceous catalyst via pyrolysis and employed it in the ozonation of hydroquinone. The catalyst was characterized by Mössbauer spectroscopy, X-ray photoelectron spectroscopy, temperature programmed desorption, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. Intermediate ...


    By IWA Publishing

  • Spectrophotometric characterization of human impacted surface waters in the Moselle watershed

    In order to characterize the pollution discharged into the Moselle River and some of its tributaries, spectroscopic techniques, namely UV–vis spectroscopy and synchronous fluorescence spectroscopy, have been combined. UV–visible spectra were analysed using the maximum of the second derivative at 225 nm (related to nitrates), the SUVA254 and E2/E3 indices (related to the nature of organic matter). ...


    By IWA Publishing

  • Effect of W doping level on TiO2 on the photocatalytic degradation of Diuron

    In the present study, three compositions of W-doped titania nano-photocatalyst are synthesized via the sol–gel method. The powders obtained were characterized by X-ray diffraction, Raman spectroscopy and UV–visible diffuse reflectance spectroscopy. The photocatalytic performances of the different photocatalysts are tested with respect to the degradation of Diuron in water solutions under ...


    By IWA Publishing

  • Near-infrared spectroscopic assessment of contamination level of sewage

    We examined the use of near infrared (NIR) spectroscopy as a rapid technique for the evaluation of sewage quality. Influent water samples, primary sedimentation tank water samples, and final effluent water samples were collected from sewage treatment facilities in Nagoya, Japan and their NIR spectra obtained. Partial least squares (PLS) models for total phosphate (TP), total nitrogen (TN), ...


    By IWA Publishing

  • What is a Spectrometer?

    The characteristics of a white LED light differs greatly, when compared to a yellow CFL. Without any special tools, one can see that the LED emits a clear white color, while the CFL generates yellow light. Going one step further, using a spectrometer, one will be able to “dissect” the light sources and see that they are composed of other colors in the visible light spectrum, such as ...


    By Larson Electronics LLC

  • Chloride ions promoted the catalytic wet peroxide oxidation of phenol over clay-based catalysts

    Catalytic wet peroxide oxidation (CWPO) of phenol over clay-based catalysts in the presence and absence of NaCl was investigated. Changes in the H2O2, Cl−, and dissolved metal ion concentration, as well as solution pH during phenol oxidation, were also studied. Additionally, the intermediates formed during phenol oxidation were detected by liquid chromatography-mass ...


    By IWA Publishing

  • Fabrication of homogeneous nanoparticle/nanoneedle BaTiO3 and Ba0.8Sr0.2TiO3 smooth thin films by simple dip coating

    Ferroelectric BaTiO3 (BTO) and Ba0.8Sr0.2TiO3 (BSTO) thin film materials have been successfully prepared by sol-gel processing and simple dip coating on glass and silicon supports. Above thin films were characterised by x-ray diffraction (XRD), Raman spectroscopy, photoelectron spectroscopy, thermal analysis, atomic force microscopy (AFM) and spectroscopic ellipsometry. Phase identification of ...


    By Inderscience Publishers

  • Adsorption of hexavalent chromium onto organic bentonite modified by the use of iron(III) chloride

    The adsorption of hexavalent chromium (Cr(VI)) was improved by using organic bentonite (OB) modified with iron(III) chloride. The adsorption mechanisms and characteristics of OB and organic bentonite modified by FeCl3 (FMOB) were studied by using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy (EDS). It was found ...


    By IWA Publishing

  • Mechanisms on formation of hierarchically porous carbon and its adsorption behaviors

    Using simple one-step carbonization-activation, the residues of paulownia flowers are employed as a precursor to prepare hierarchically porous activated carbon. After investigating the optimum conditions, the obtained paulownia flowers based activated carbon (PFAC) is characterized by Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscope, ...


    By IWA Publishing

  • Positron annihilation rates in materials

    The study of positron annihilation rate is one subject of a relatively new method of material structure analysis ? positron annihilation spectroscopy. Polyethylene Terephthalate (PET) films have been studied by positron annihilation rate measurement. The correlation between annihilation rates and the PET film thickness was established. Similar studies were carried out for aluminium foils and ...


    By Inderscience Publishers

  • Functionalised multi–walled carbon nanotubes for chemical vapour detection

    Oxygen plasma functionalised Multi–Walled Carbon Nanotubes (MWCNT) were used to prepare gas sensors that can operate at room temperature. Alumina substrates with interdigitated gold electrodes were employed as transducers and the air–brushing method was used to coat them with carbon nanotube film. Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) images of deposited ...


    By Inderscience Publishers

  • Fe-FeS2 adsorbent prepared with iron powder and pyrite by facile ball milling and its application for arsenic removal

    Arsenic is one of the major pollutants and a worldwide concern because of its toxicity and chronic effects on human health. An adsorbent of Fe-FeS2 mixture for effective arsenic removal was successfully prepared by mechanical ball milling. The products before and after arsenic adsorption were characterized with scanning electron microscopy, X-ray diffraction, Fourier transform infrared ...


    By IWA Publishing

  • Identification of a suitable sterilisation method for collagen derived from a marine Demosponge

    Collagen is widely used as a biomedical material, and its importance is likely to grow as research and understanding progresses in this field. As a biomedical material, ensuring the sterility of collagen before use as, or incorporation into, a medical device is paramount. However, common sterilisation techniques can induce changes in the physical structure and protein chemistry of collagen, ...


    By Inderscience Publishers

  • Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you