FEASIBILITY STUDY FOR THE USE OF NATURAL MORDENITE IN PURIFICATION PROCESSES OF WASTEWATERS FROM PHARMACEUTICAL POLLUTANTS

The present research concerns the possibility of adsorptive removal of the frequently used antibiotics Ã¢Â€Â“ moxifloxacin and norfloxacin on natural zeolites Ã¢Â€Â“ mordenite and its acid-modified form from aqueous solutions. The adsorption of the above-mentioned antibiotics on the selected natural zeolite samples was investigated under static and dynamic conditions. Adsorption experiment under dynamic conditions carried out using the specially constructed dynamic type of laboratory equipment. Based on the data of chemical, IR spectroscopic, X-ray diffraction analyses, it has shown that when the zeolite adsorbent is treated with an acid, an equivalent exchange of extra framework cations for a hydrogen ion and dealumination occurs and silanol groups are formed at the same time. The increase in the adsorption activity of mordenite as a result of its treatment with acid is associated with an increase in the pore size due to the unblocking of the adsorbent aluminosilicate framework channels during dealumination.

Download Full-text

X-ray Determination of Compressive Residual Stresses in Spring Steel Generated by High-Speed Water Quenching

Materials ◽

10.3390/ma12071154 ◽

2019 ◽

Vol 12 (7) ◽

pp. 1154

Author(s):

Diego E. Lozano ◽

George E. Totten ◽

Yaneth Bedolla-Gil ◽

Martha Guerrero-Mata ◽

Marcel Carpio ◽

...

Keyword(s):

Heat Treatment ◽

Residual Stresses ◽

High Speed ◽

Spring Steel ◽

X Ray Diffraction ◽

Laboratory Equipment ◽

X Ray ◽

Water Chamber ◽

Hardened Case ◽

Compressive Residual Stresses

Automotive components manufacturers use the 5160 steel in leaf and coil springs. The industrial heat treatment process consists in austenitizing followed by the oil quenching and tempering process. Typically, compressive residual stresses are induced by shot peening on the surface of automotive springs to bestow compressive residual stresses that improve the fatigue resistance and increase the service life of the parts after heat treatment. In this work, a high-speed quenching was used to achieve compressive residual stresses on the surface of AISI/SAE 5160 steel samples by producing high thermal gradients and interrupting the cooling in order to generate a case-core microstructure. A special laboratory equipment was designed and built, which uses water as the quenching media in a high-speed water chamber. The severity of the cooling was characterized with embedded thermocouples to obtain the cooling curves at different depths from the surface. Samples were cooled for various times to produce different hardened case depths. The microstructure of specimens was observed with a scanning electron microscope (SEM). X-ray diffraction (XRD) was used to estimate the magnitude of residual stresses on the surface of the specimens. Compressive residual stresses at the surface and sub-surface of about −700 MPa were obtained.

Download Full-text

Li-Tosudite: X-Ray Diffraction, IR Spectroscopic, Thermal, and Thermochemical Studies

Geochemistry International ◽

10.1134/s0016702918030059 ◽

2018 ◽

Vol 56 (3) ◽

pp. 234-239

Author(s):

L. P. Ogorodova ◽

M. F. Vigasina ◽

E. A. Vlasov ◽

L. V. Mel’chakova ◽

V. V. Krupskaya ◽

...

Keyword(s):

X Ray Diffraction ◽

X Ray ◽

Ir Spectroscopic

Download Full-text

IR-spektroskopische und kristallstrukturelle Untersuchungen an 2.4-Pentandionato-Lithium-(Li-acac)-Einkristallen / IR-Spectroscopic and X-Ray Structural Investigation of 2,4-Pentandionato-Lithium (Li-acac) Single Crystals

Zeitschrift für Naturforschung B ◽

10.1515/znb-1971-0605 ◽

1971 ◽

Vol 26 (6) ◽

pp. 528-530 ◽

Cited By ~ 5

Author(s):

E. Funck ◽

A. Jungermann ◽

J. Kaiser ◽

F. A. Schröder

Keyword(s):

Ir Spectra ◽

Single Crystals ◽

Molecular Species ◽

Structural Investigation ◽

X Ray Diffraction ◽

Space Group ◽

X Ray ◽

Ir Reflection ◽

Ir Spectroscopic

Single crystals of Li-acetylacetonate (Li-acac) were characterised by microscopical, IR-reflection and X-ray diffraction measurements.The space group was found to be C cca (orthorhombic). From the IR-spectra (polarised radiation) and the properties of the space group the probable arrangements of the molecular species in the crystal are deduced.

Download Full-text

Conversion of fisheries waste as magnetic hydroxyapatite bionanocomposite for the removal of heavy metals from groundwater

Water Science & Technology Water Supply ◽

10.2166/ws.2017.211 ◽

2017 ◽

Vol 18 (4) ◽

pp. 1406-1419

Author(s):

F. Elmi ◽

R. Chenarian Nakhaei ◽

H. Alinezhad

Keyword(s):

Heavy Metals ◽

Freundlich Isotherm ◽

Spectroscopic Techniques ◽

Order Kinetic ◽

Fish Scale ◽

X Ray Diffraction ◽

X Ray ◽

Removal Of Heavy Metals ◽

Order Kinetic Model ◽

Ir Spectroscopic

Abstract This study is the first report of its type demonstrating the synthesis of mHAP on the basis of magnetic functionalization with nHAP, which were synthesized using Rutilus frisii kutum fish scale as a benign fishery waste by-product. The mHAP was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray diffraction (EDX), and Fourier transform infrared (FT-IR) spectroscopic techniques. The XRD pattern confirmed the formation of a single-phase nHAP without any extra steady phases. It was also found that the pseudo-second-order kinetic model gave a satisfactory fit to the experimental data (R2 = 0.99). The maximum removal percentages of Cu and Zn ions in optimal conditions (adsorbent dosage at 0.1 g, 30 min contact time at 25 ± 1 °C and pH = 5 ± 0.1) by mHAP were 97.1% and 93.8%, respectively. Results also demonstrated that mHAP could be recycled for up to five cycles in the case of copper and zinc. The Langmuir isotherm was proved to have a better correlation compared with that of the Freundlich isotherm. The thermodynamic parameters indicated that it was a spontaneously endothermic reaction. In conclusion, mHAP could be regarded as a powerful candidate for efficient biosorbent, capable of adsorbing heavy metals from aqueous solutions.

Download Full-text

First steps towards time-resolved 'in-house' X-ray diffraction experiments

Acta Crystallographica Section A Foundations and Advances ◽

10.1107/s2053273314092249 ◽

2014 ◽

Vol 70 (a1) ◽

pp. C775-C775 ◽

Cited By ~ 1

Author(s):

Radoslaw Kaminski ◽

Jason Benedict ◽

Elzbieta Trzop ◽

Katarzyna Jarzembska ◽

Bertrand Fournier ◽

...

Keyword(s):

Excited State ◽

Time Resolution ◽

Structural Changes ◽

Laser Pulses ◽

High Repetition Rate ◽

X Ray Diffraction ◽

Laboratory Equipment ◽

Time Resolved ◽

X Ray ◽

Ligand Charge Transfer

High-intensity X-ray sources, such as synchrotrons or X-ray free electron lasers, providing up to 100 ps time-resolution allow for studying very short-lived excited electronic states in molecular crystals. Some recent examples constitute investigations of Rh...Rh bond shortening,[1] or metal-to-ligand charge transfer processes in CuI complexes.[2] Nevertheless, in cases in which the lifetime of excited state species exceeds 10 μs it is now possible, due to the dramatic increase in the brightness of X-ray sources and the sensitivity of detectors, to use laboratory equipment to explore structural changes upon excitation. Consequently, in this contribution we present detailed technical description of the 'in-house' X-ray diffraction setup allowing for the laser-pump X-ray-probe experiments within the time-resolution at the order of 10 μs or larger. The experimental setup consists of a modified Bruker Mo-rotating-anode diffractometer, coupled with the high-frequency Nd:YAG laser (λ = 355 nm). The required synchronization of the laser pulses and the X-ray beam is realized via the optical chopper mounted across the beam-path. Chopper and laser capabilities enable high-repetition-rate experiments reaching up to 100 kHz. In addition, the laser shutter is being directly controlled though the original diffractometer software, allowing for collection of the data in a similar manner as done at the synchrotron (alternating light-ON & light-OFF frames). The laser beam itself is split into two allowing for improved uniform light delivery onto the crystal specimen. The designed setup was tested on the chosen set of crystals exhibiting rather long-lived excited state, such as, the Cu2Br2L2 (L = C5H4N-NMe2) complex, for which the determined lifetime is about 100 μs at 90 K. The results shall be presented. Research is funded by the National Science Foundation (CHE1213223). KNJ is supported by the Polish Ministry of Science and Higher Education through the "Mobility Plus" program.

Download Full-text

A New Binuclear Lutetium(III) Dimethyl-N-trichloroacetylamidophosphate Complex with a γ, γ'-Dipyridyl Bridge, {Lu[CCl3C(O)NP(O)(OCH3)2]3}2-μ(γ,γ'-dipy)

Zeitschrift für Naturforschung B ◽

10.1515/znb-2001-0306 ◽

2001 ◽

Vol 56 (3) ◽

pp. 249-254 ◽

Cited By ~ 8

Author(s):

Victor A. Trush ◽

Jolanta Swiatek-Kozlowska ◽

Victor V. Skopenko ◽

Vladimir M. Amyrkhanov

Keyword(s):

Crystal And Molecular Structure ◽

Carbonyl Oxygen ◽

Carbonyl Groups ◽

X Ray Diffraction ◽

Triclinic Space Group ◽

Metal Centers ◽

X Ray ◽

Heterocyclic Ligand ◽

New Type ◽

Ir Spectroscopic

Abstract A new type of binuclear coordination compound of lutetium, {Lu2L6 · μ-(γ,γ '-dipy)} (where L = dimethyl-N-trichloroacetylamidophosphate anion and γ,γ '-dipy = 4,4'-dipyridyl), has been obtained. The IR spectroscopic data reveal that the ambidentate phosphoryl ligand is coordinated to the metal center in a bidentate manner via the phosphoryl and carbonyl oxygen atoms. The crystal and molecular structure of {Ln2L6-μ-(γ ,γ '-dipy)} has been determined by means of X-ray diffraction (triclinic, space group P i with parameters: a = 9.259(2), b = 12.530(3), c = 16.548(3) Å, α = 85.44(3)°, β = 75.64(3)°, γ = 70.56(3)°, Z = 1). The structure is made up of centrosymmetric binuclear molecules, in which the neutral heterocyclic ligand is coordinated to the metal centers in a bidentate bridging manner via its nitrogen atoms. The coordination number of each Lu(III) atom is 7 [60(L-) + N((γ ,γ '-dipy)]. Phosphoryl and carbonyl groups of the L- ligands are disposed in syn-position and are included in the six-membered chelate metallocycles. The coordination polyhedron of lutetium can be described as distorted mono-capped octahedron.

Download Full-text

Structural and IR-spectroscopic characterization of magnesium acesulfamate

Zeitschrift für Naturforschung B ◽

10.1515/znb-2015-0132 ◽

2016 ◽

Vol 71 (1) ◽

pp. 51-55 ◽

Cited By ~ 3

Author(s):

Oscar E. Piro ◽

Gustavo A. Echeverría ◽

Beatriz S. Parajón-Costa ◽

Enrique J. Baran

Keyword(s):

Crystal Structure ◽

Aqueous Solution ◽

Elemental Analysis ◽

Spectroscopic Characterization ◽

Magnesium Carbonate ◽

X Ray Diffraction ◽

Triclinic Space Group ◽

X Ray ◽

Ir Spectroscopic

AbstractMagnesium acesulfamate, Mg(C4H4NO4S)2·6H2O, was prepared by the reaction of acesulfamic acid and magnesium carbonate in aqueous solution, and characterized by elemental analysis. Its crystal structure was determined by single crystal X-ray diffraction methods. The substance crystallizes in the triclinic space group P1̅ with one molecule per unit cell. The FTIR spectrum of the compound was also recorded and is briefly discussed. Some comparisons with other simple acesulfamate and saccharinate salts are also made.

Download Full-text

Preparation and Characterization the Cheap Mineral (Calcium Compound): The Preliminary Survey in the Natural Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.770.303 ◽

2013 ◽

Vol 770 ◽

pp. 303-306

Author(s):

A. Montree ◽

K. Teanchai ◽

Wichian Siriprom

Keyword(s):

Molecular Composition ◽

Natural Material ◽

X Ray Diffraction ◽

X Ray ◽

Conventional Analysis ◽

Calcium Compound ◽

Egg Shells ◽

Ft Ir ◽

Ir Study ◽

Ir Spectroscopic

The present work reports the production of biomaterial, while the potential in bio mineralization were studied with three conventional analysis techniques, X-Ray Diffraction (XRD) were confirm the crystal structure, Energy Dispersive X-Ray Fluorescence (EDXRF) and Fourier Transform Infrared Spectroscopy (FT-IR) study trace element and molecular composition, respectively. The results of XRD reveal that, the egg shells have a crystalline of calcium carbonate in phase calcite and fishbone have a crystalline of calcium phosphate in phase hydroxyapatite, respectively. The composition of both mineral and the level of metals element were investigated by EDXRF. The major composition was identified as Calcium (Ca) and other element are Potassium (K), Phosphorus (P) Sulfur (Al), Zinc (Zn), Ferrum (Fe), Copper (Cu) and Strontium (Sr). In addition, the deeply investigate molecular composition both mineral used using FT-IR spectroscopic analysis.

Download Full-text