Title: Spectroscopy and Spectral Analysis

Title: Spectroscopy and Spectral Analysis

ISO Abbreviated Title:

JCR Abbreviated Title:

ISSN: 1386-1425

Issues/Year:

Journal Country/Territory:

Language:

Publisher:

Publisher Address:

Subject Categories:

: Impact Factor

? Huang, Z.H., Sun, X.Y., Li, Y., Ge, W. and Wang, J.D. (2005), Adsorption behaviors of chitosan and the analysis of FTIR spectra. Spectroscopy and Spectral Analysis, 25 (5), 698-700.

Full Text: 2005\Spe Spe Ana25, 698.pdf

Abstract: This paper studied the adsorption behavior of lab-made chitosan for acid dyeing waste water and basic dyeing waste waters, based on the effects of adsorbing time, deacetylation degree of chitosan, and pH of waste water. The results showed that the adsorption of basic fuchsin and saffron by the chitosan almost reached equilibrium state in 20 min. The adsorption capacities of the chitosan for dyes was comparable with activated carbon. Moreover, its dosages were only 2/3 of the latter. The adsorption process for Acid Red presented a dynamics character of first order reaction. FTIR spectroscopy was used to analyze the adsorption mechanisms of chitosan for different kinds of dyes. It was found that a great deal of hydroxide radicals in the chitosan molecule participated in the adsorption of basic fuchsin and saffron.

Keywords: Chitosan; FTIR; Dyes; Waste Water Treatment; Adsorption

? Zhang, D., Zhang, W.J., Guan, X., Gao, H. and He, H.B. (2009), Adsorption behavior of immobilized nanometer barium-strontium titanate for cadmium ion in water. Spectroscopy and Spectral Analysis, 29 (3), 824-828.

Full Text: 2009\Spe Spe Ana29, 824.pdf

Abstract: Nanometer barium-strontium titanate immobilized on silica gel G was successfully prepared by the citrate acid sol-gel method and characterized using X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared spectrophotometer (FTIR). By means of the determination of flame atomic absorption spectrometry (FAAS), the adsorption behavior of immobilized nanometer-barium strontium titanate for cadmium ion was investigated. The results showed that the nanometer barium-strontium titanate was immobilized on the silica gel G firmly, gaining a new sort of adsorbent. And the cadmium ion studied could be quantitatively retained in the pH value range of 4-7. The adsorption behavior followed a Freundlich adsorption isotherm and a pseudo-second-order kinetic model. The thermodynamic constants of the adsorption process, such as enthalpy changes (H), Gibbs free energy changes (G) and entropy changes (S), were evaluated. These showed that the adsorption of cadmium ion by immobilized nanometer barium-strontium titanate was endothermic and spontaneous physical process. The cadmium ion adsorbed could be completely eluted using 1 mol . L^-1 HNO₃. A new method for the determination of trace cadmium ion in water based on this immobilized nanometer barium-strontium titanate preconcentration and FAAS determination was proposed. The method has been applied to the determination of trace cadmium ion in tap water and river water with satisfactory results.

Keywords: Acid, Adsorption, Adsorption Behavior, Cadmium Ion, Dithizone, Environmental-Samples, FAAS, Immobilized Nanometer Barium-Strontium Titanate, Lead-Ion, Packed Micro-Column, Powder, Silica Gel G, Simultaneous Online Preconcentration, Spectrometry, Titanium-Dioxide, Trace-Metals

? Fan, C.H., Zhang, Y., Zhang, Y.C., Li, J. and Chefetz, B. (2010), Cr(VI) adsorption mechanism on rice husk ash burned at low temperature by method of IR spectra. Spectroscopy and Spectral Analysis, 30 (9), 2345-2349.

Full Text: 2010\Spe Spe Ana30, 2345.pdf

Abstract: Boehm titration method was used to analyze functional groups on cell surface of rice husk ash burned at low temperature in the present paper. Effects of initial pH value and temperature on Cr(VI) adsorption were studied, adsorption capacity was tested with the help of kinetic models and adsorption isotherms, instruments of Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) were used to check characteristics and adsorption mechanism of Cr(VI). The results indicated that optimal removing rate was achieved at initial pH value 5, and pH values of aqueous solution changed little before and after adsorption process. The adsorbent of rice husk ash could remove Cr(VI) effectively, and the maximum removing rate could be 95% with Cr(VI) concentration 20 mg . L^-1 and achieve 1-2 level of state standard (GB8978-1996). The adsorption process fits pseudo-second-order kinetic model and Langmuir isotherm better, the maximum adsorption capacity of Cr(VI) was 3. 277 6 mg. g^-1 Results of FTIR showed that amide II band, Si-O-Si, O-Si-O were important for Cr(VI) removal. SEM micrographs revealed that series of needle-shaped precipitation appeared on cell surface, and inorganic precipitation mechanism and redox mechanism might work in the test. As a kind of low cost adsorbent, rice husk ash can be applied to remove heavy metals in environment with great potential.

Keywords: Adsorbent, Adsorption, Adsorption Capacity, Adsorption Isotherms, Adsorption Mechanism, Aqueous Solution, Biosorption, Capacity, Carbon, Characteristics, Chromium, Concentration, Cost, Cr(VI), Cr(VI) Adsorption, Environment, FTIR, Functional Groups, Heavy Metals, IR, Isotherm, Isotherms, Kinetic, Kinetic Model, Kinetic Models, L1, Langmuir, Langmuir Isotherm, Low Cost, Low Cost Adsorbent, Low Temperature, Mechanism, Metal, Metals, Model, Models, pH, pH Value, Potential, Precipitation, Pseudo Second Order, Pseudo-Second-Order, Pseudo-Second-Order Kinetic Model, Removal, Rice, Rice Husk, Rice Husk Ash, Rice-Husk, SEM, Solution, State, Surface, Temperature, Value, Water, Work

Title: Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy

ISO Abbrev. Title: Spectroc. Acta Pt. A-Molec. Biomolec. Spectr.

JCR Abbrev. Title: Spectrochim Acta A

ISSN: 1386-1425

Issues/Year: 15

Language: Multi-Language

Journal Country/Territory: England

Publisher: Pergamon-Elsevier Science Ltd

Publisher Address: The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England

Subject Categories:

Spectroscopy: Impact Factor 1.566, 19/39 (2009)

? Zhao, H.C., Ding, F., Wang, X.L., Ju, H.F., Li, A.Y. and Jin, L.P. (2008), A study on silver nanoparticles-sensitized fluorescence and second-order scattering of the complexes of Tb(III) with ciprofloxacin and its applications. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 70 (2), 332-336.

Full Text: 2008\Spe Act Par A-Mol Bio Spe70, 332.pdf

Abstract: Fluorescence of terbium(III) is sensitized when excited in the presence of ciprofloxacin (CPLX) in the aqueous solution because a Tb(III)-CPLX complex is formed and the maximum fluorescence peak locates at 545 nm. The second-order scattering (SOS) peak at 545 nm also appears for the Tb(III)-CPLX complexes with the excitation wavelength of 272 nm. The intensity at 545 nm obviously increases when the silver nanoparticles are added to the Tb(III)-CPLX system, and the relative intensity is proportional to the concentration of CPLX. Based on this phenomenon, a new method for the determination of CPLX has been developed by using a common spectrofluorometer to measure the intensity of fluorescence and SOS. The intensity is enhanced most by silver nanoparticles at pH 6.0. The calibration graph for CPLX is linear in the range of 3.0×10(-9) to 1.0×10-5 mol l-1. The detection limit is 8.5×10-10 mol l-1. The method was applied satisfactorily to the determination of CPLX in tablets and capsules. The results show that silver nanoparticles with certain size and concentration can enhance the fluorescence and SOS intensity of the system. (C) 2007 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Aqueous Solution, Capsules, Chemiluminescence, Ciprofloxacin, Fluorescence, Fluoroquinolones, Liquid-Chromatographic Determination, Nanoparticles, pH, Phase, Plasma, Rights, Samples, Scattering, Second Order, Second-Order, Second-Order Scattering, Serum, Silver, Silver Nanoparticles, Size, Solution, Surface-Enhanced Raman, Terbium

? Ghaedi, M., Amirabad, S.Z., Marahel, F., Kokhdan, S.N., Sahraei, R., Nosrati, M. and Daneshfar, A. (2011), Synthesis and characterization of cadmium selenide nanoparticles loaded on activated carbon and its efficient application for removal of Muroxide from aqueous solution. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 83 (1), 46-51.

Full Text: 2011\Spe Act Par A-Mol Bio Spe83, 46.pdf

Abstract: In the first, Cadmium selenide Nanoparticle loaded on activated carbon (CdSe-NP-AC) has been synthesized and characterized by different techniques including XRD and SEM. Then, this new adsorbent successfully has been applied for the removal of muroxide (MO) from aqueous solution in batch studies, while the effect of various experimental parameters like initial pH (pH(0)), contact time, amount of (CdSe-NP-AC) and initial MO concentration (C(0)) on its removal percentage was examined by one at a time optimization method. It was found following optimization of variable, the adsorption of MO onto (CdSe-NP-AC) followed pseudo-second-order kinetics and show Tempkin and Langmuir models for interpretation of experimental data. It was observed that by increasing the temperature the removal percentage was improved and the positive change in entropy (ΔS degrees) and heat of adsorption (ΔH degrees) show the endothermic nature of process, while the high negative value in Gibbs free energy change (ΔG degrees) indicates the feasible nature of adsorption process. (C) 2011 Elsevier B.V. All rights reserved.

Keywords: Activated Carbon, Adsorbent, Adsorption, Brilliant Green-Dye, Cadmium, Cadmium Selenide Nanoparticles, CdSe Nanostructures, Environmental-Samples, Heavy-Metal Ions, Industry Waste, Isotherm, Kinetic, Kinetics, Langmuir, Malachite Green, Methyl-Orange, Muroxide, pH, Rhodamine-B, Solid-Phase Extraction, Waste Materials