Tetsuaki Nishida

Tetsuaki Nishida
Kindai University · Department of Biological and Environmental Chemistry

PhD

About

229
Publications
7,036
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2,387
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Introduction
Tetsuaki NISHIDA, PhD (Kyushu Univ.) 1977-2000 Department of Chemistry, Faculty of Science, Kyushu University, Fukuoka, Japan 2000-present Department of Biological and Environmental Chemistry, Iizuka, Fukuoka, Japan Research Topics 1. Water purification with Polymer Gel or Porous Ceramic prepared by recycling coal ash, glass bottle, volcanic ash, etc. 2. Development of highly conductive vanadate glass 3. Characterization of advanced materials like conductive glass by Mössbauer spectroscopy....
Additional affiliations
October 2010 - September 2013
Kindai University
Position
  • Head of Department
October 2010 - September 2013
Kindai University
Position
  • Vice-director/ Professor (Full)
April 2008 - March 2016
Kindai University
Position
  • Professor (Full)
Description
  • Topic 1: Development of new conductive vanadate glass for cathode-active material of LIB, MEMS, glass-paste, etc. Topic 2: Waste-water purification with polymer gel and porous ceramics prepared with coal ash, glass, volcanic ash, etc.
Education
April 1972 - March 1977
Kyushu University
Field of study
  • Radiochemistry/Inorganic Chemistry

Publications

Publications (229)
Article
The Mössbauer spectrum of LiFeVPOx , LiFeV0.5POx and LiFePOx glasses prepared by conventional melt-quenching method for cathode active material is composed of a doublet due to distorted FeIIIO4 tetrahedra. The Mössbauer spectrum of LiFePOx glass has an additional doublet due to distorted FeIIO6 octahedra. Heat treatment of LiFeVPOx and LiFeV0.5POx...
Article
57Fe Mössbauer spectra of 30CaO·15Al2O3·5Fe2O3·25PbO·25P2O5 glass consist of two quadrupole doublets due to distorted Fe(III)O6 and Fe(II)O6 octahedra. Mössbauer spectra of the aluminophosphate glass irradiated with60Co γ-rays (≈5·104Gy) were essentially the same as those of non-irradiated glass. Mössbauer spectra of γ-ray irradiated aluminophospha...
Article
A significant increase in the electrical conductivity is achieved from the order of 10-7 to 4×10-2 S·cm-1 when barium iron(III) vanadate glass is heat treated at around the crystallization temperature. 57Fe-Mössbauer spectra of heat-treated glasses show a distinct decrease in the quadrupole splitting from 0.76 to 0.32 mm·s-1, reflecting an evident...
Article
Full-text available
The isomer shift in the 57Fe-Mössbauer spectra of xCaO·(90−x)Ga2O3·10Fe2O3 (x=40–60) and xBaO ·(90−x)Ga2O3·10Fe2O3(x=65–70) glasses decreases gradually from 0.28 to 0.16 mm s−1 with increasing CaO or BaO contents. This indicates a formation of nonbridging oxygen atoms in the GaO4 and FeO4 tetrahedra. Large quadrupole splitting (Δ) values ranging fr...
Article
Room temperature Mössbauer spectrum of fly ash-recycled glass (FARG), prepared with more than 86 mass% of fly ash and less than 14 mass% of Fe2O3, comprises two types of doublets due to Fe(II) and Fe(III) of magnetite nanoparticles. Isothermal annealing of fly ash-recycled glass at 1100 °C for 60 minutes results in a precipitation of ferrimagnetic...
Article
Glass-ceramics xZrO2•10Fe2O3•(90-x)V2O5 with ‘x’ between 0 and 30 mol% and yZrO2・(20-y)CaO・10Fe2O3・70V2O5 glass with ‘y’ between 0 and 20 mol%, respectively abbreviated as xZFV and yZCFV, before and after heat treatment at 500 oC for 100 min, were evaluated as potential cathode-active materials for sodium-ion batteries (SIBs). Relationships between...
Article
A relationship between local structure and electrical property of xNa2O·10P2O5·(90−x)V2O5 glass (x = 5, 25 and 45 mol%, abbreviated as xNPV) was investigated by means of ⁵⁷Fe-Mössbauer spectroscopy(FeMS), X-ray absorption fine structure (XAFS), X-ray diffractometry (XRD), impedance spectroscopy (IS), and cathode active performance test of Na-ion ba...
Article
Full-text available
This review paper summarizes early Mössbauer and DTA studies of different oxide glasses containing small amounts of iron (III) or tin (IV) as the probe. A lot of valuable information of the atomic level has been obtained about the role of nonbridging oxygen (NBO), network former (NWF), network modifier (NWM), local network structure, glass transiti...
Article
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Heat treatment of 20BaO·xMmOn·(10−x)Fe2O3·70V2O5 glasses containing different metal oxides (MmOn), such as Fe2O3, Al2O3, MnO2, CuO, Cu2O, ZnO, Ga2O3, GeO2, MoO3, SnO2 and WO3, was accompanied by a remarkable decrease in DC-resistivity (ρ) at room temperature from the order of MΩ cm to Ω cm. N-type semiconductor model could be successfully applied t...
Article
Full-text available
The carbonophosphate Na3FePO4CO3 was synthesized by the mechanical ball milling method for the first time. The composition of the obtained sample with a higher amount of Fe²⁺ was Na2.66Fe²⁺0.66Fe³⁺0.34PO4CO3 as confirmed by Mössbauer analysis, owing to the good airtight properties of this method. The obtained samples in an organic electrolyte deliv...
Article
Fukushima Dai-ichi Nuclear Power Plant Accident in Japan caused a severe environmental pollution by the radioactive nuclides such as ¹³⁷Cs and ⁹⁰Sr. In this study, adsorption and removal of Cs⁺ in aqueous solution have been developed by using the hydrogel composed of poly(2-acrylamido-2-methyl-1-propanesulfonic acid), abbreviated as PAMPS. By optim...
Article
Full-text available
57Fe Mössbauer spectra of 20BaO·3SnO2·7Fe2O3·70V2O5 glass measured at room temperature shows a marked decrease in quadrupole splitting (Δ) of iron (III) from 0.71 to 0.57 and 0.58 (± 0.02) mm s−1 after isothermal annealing at 500 °C for 30 and 60 min, respectively. The Δ value also shows a decrease from 0.71 to 0.65 and 0.60 (± 0.02) mm s−1 after t...
Article
Vanadate glasses have numerous industrial applications and enhancement of their electrical conductivity is of interest for conducting glass for electronic and optical devices. The effect of substitutional doping of SnIV (4d¹⁰) for FeIII on the local structure and electrical conductivity (σ) of barium iron vanadate glass is investigated in this stud...
Article
Glass samples with a composition of 1.5Li2O•(1.5-x)Fe2O3•xSnO2•3P2O5 (x = 0.1, 0.3 and 0.5) were prepared by melt-quench method. X-ray diffraction (XRD) study revealed the glass formation of the as-quenched samples. Each glass sample was heat treated (HT) at 600 °C for 1 h to obtain glass ceramics. HT samples showed precipitation of a small amount...
Article
Full-text available
Fe Mössbauer spectrum of conductive barium iron vanadate glass with a composition of 20BaO·10Fe2O3·70V2O5 (in mol%) showed paramagnetic doublet peak due to distorted FeIIIO4 tetrahedra with isomer shift (δ) value of 0.37 (± 0.01) mm s⁻¹. Mössbauer spectra of 20BaO·10Fe2O3·xMoO3·(70 − x)V2O5 glasses (x = 20–50) showed paramagnetic doublet peaks due...
Article
Sodium polyacrylate (SPA) has been successfully applied to effectively remove Cu2+ ions from the waste water. Terminal group (–COO–) in the SPA showed high Cu2+-removal capability for the waste-water purification. In case of 40 mL of 0.4 M Cu2+ solution, the removal was complete in 3 h when 2-6 g of SPA was applied for. All the experimental results...
Article
A relationship between local structure and methylene blue degradation ability of nanoparticle (NP) mixtures composed of metallic iron (Fe⁰) and maghemite (γ-Fe2O3) was studied by means of ⁵⁷Fe-Mössbauer spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetry-differential thermal analysis (TG-DTA), ultraviolet...
Article
Full-text available
Water purification was examined using porous ceramics prepared by sintering a powder mixture of volcanic ash, waste glass and a small amount of wood charcoal. The porous ceramics had cross-linked 3D-channels of which the diameter ranged from several nm to several μm. Three kilograms of porous ceramics placed in 90 L of circulating artificial seawat...
Article
Full-text available
New porous ceramics (PC) prepared by recycling waste glass bottle of soft drinks (80 mass%) and bamboo charcoal (20 mass%) without any binder was applied to the waste water purification under aeration at 25 °C. Artificial waste water (15 L) containing 10 mL of milk was examined by combining 15 mL of activated sludge and 750 g of PC. Biochemical oxy...
Article
20BaO·5ZnO·5Fe2O3·70V2O5 glass annealed at 450°C for 30 min showed a marked decrease in the electric resistivity (ρ) from 4.0×10⁵ to 4.8 Ωcm, while 20BaO·5Cu2O·5Fe2O3·70V2O5 glass from 2.0×10⁵ to 5.0 Ωcm. As for the conduction mechanism, it proved that n-type semiconductor model in conjugation with the small polaron hopping theory was most probable...
Article
A relationship between the local structure and the visible-light activated photocatalytic effect was investigated in the glass and glass ceramics prepared by recycling waste slag, which was discharged from a Tokyo Household Garbage Combustion Plant. For the preparation of a homogeneous sample of waste slag recycled glass, (WSRG), 10 wt% of Na2CO3 a...
Article
The relationship between local structure and visible-light photocatalytic ability of tin silicate glass prepared by sol–gel method was investigated. ¹¹⁹Sn Mössbauer spectrum of SnOx·SiO2 glass prepared from SnCl2 showed a small peak of SnII component besides the major amount of SnIV. The smallest bandgap energy of 2.5 ± 0.5 eV was estimated from Ta...
Article
Full-text available
Li2O·0.25Fe2O3·0.25NiO·1.5SiO2 glass was prepared with and without 5 wt % sulfur (S) while melting the mixture of the starting materials at 1350 °C for 1 h in air. A part of the as-prepared glass was heat treated for 1 h near its crystallization temperature (Tc) as determined from differential thermal analysis. Each glass was also investigated by m...
Article
Full-text available
This paper reviews recent studies of highly conductive barium iron vanadate glass with a composition of 20 BaO · 10 Fe2O3 · 70 V2O5 (in mol %). Isothermal annealing of the vanadate glass for several ten minutes at a given temperature, higher than glass transition temperature or crystallization temperature, caused an increase in σ. Substitution of C...
Article
A relationship between structure and visible light-activated photocatalytic activity of iron-containing soda lime aluminosilicate (15Na2O⋅15CaO⋅40Fe2O3⋅xAl2O3⋅(30−x)SiO2) glass (xNCFAS) was investigated by means of 57Fe-Mössbauer spectroscopy, X-ray diffractometry (XRD) and UV–visible light absorption spectroscopy (UV–VIS). The 57Fe-Mössbauer spect...
Article
Full-text available
Egyptian basalt rock was used to prepare some glasses with different additives of Na2O by the melt quenching method. The prepared glasses were characterized applying FTIR, XRD and Mössbauer Effect (ME) spectroscopy. XRD indicated that all the samples showed a homogeneous glassy phase except the sample containing 35 mol % of Na2O which showed a very...
Article
Full-text available
A relationship between local structure, electrical conductivity (σ) and thermal property of 10SnO2·10P2O5·10Fe2O3·xAgI·(70 − x)V2O5, 10SnO2·10P2O5·10Fe2O3·xAg2O·(70 − x)V2O5 and 10SnO2·10P2O5·10Fe2O3·x/2(AgI·Ag2O)·(70 − x)V2O5 glasses, respectively abbreviated as xAIVSPF, xAOVSPF and xAIAOVSPF with ‘x’ between 0 and 40 mol % were investigated by 57...
Article
A relationship between the photocatalytic effect and the local structure of 50Fe2O3⋅ (50−x)SiO2⋅xTiO2 glass abbreviated as 50FSxTi prepared by sol-gel method was investigated by 57Fe-Mössbauer spectroscopy (FeMS), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet-visible diffuse reflectance spectroscopy (UV...
Conference Paper
Full-text available
A relationship between local structure and methylene blue (MB) decomposing ability of nanoparticles (NPs) of metallic iron (Fe0) and maghemite (γ-Fe2O3) was investigated by 57Fe Mössbauer spectroscopy, X-ray diffractometry and UV-visible light absorption spectroscopy. γ-Fe2O3 NPs were successfully prepared by mixing (NH4)2Fe(SO4)2·6H2O (Mohr's salt...
Conference Paper
Full-text available
Heat treatment of barium iron vanadate glass, BaO-Fe2O3-V2O5, at temperatures higher than crystallization temperature causes a marked decrease in resistivity (ρ) from several MΩcm to several Ωcm. 57Fe Mössbauer spectrum of heat-treated vanadate glass shows a marked decrease in quadrupole splitting (Δ) of FeIII, reflecting a structural relaxation, i...
Article
A relationship between local structure, thermal stability and electrical conductivity (σ) of xR2O·10Fe2O3·(90 − x)V2O5 glasses (abbreviated as xRFV glasses, where R = Li, Na, K; x = 20 and 40 in mol %) was investigated by 57Fe-Mössbauer spectroscopy, X-ray diffractometry, differential thermal analysis (DTA) and DC two- and four-probe method. From D...
Article
Full-text available
A relationship between local structure and visible light activated catalytic effect of iron containing soda lime silicate glass with the composition of 15Na2O·15CaO·xFe2O3·(70-x)SiO2, x = 5–50 mass %, abbreviated as NCFSx was investigated by means of 57Fe-Mössbauer spectroscopy, X-ray diffractometry (XRD), small angle X-ray scattering (SAXS), elect...
Article
Vanadate glass is semiconductive with the electrical conductivity(σ) of 10−7 - 10−5 S cm−1, which is caused by 3d electron(polaron) hopping from VVI(or VIII) to VV. Interestingly, a drastic increase of σ from 10−5 to 100 S cm−1 was observed when 20BaO·70V2O5·10Fe2O3 glass was isothermally annealed at around crystallization peak temperature(Tc) of 5...
Article
Vanadate glass is semiconductive with the electrical conductivity(σ) of 10−7 - 10−5 S cm−1, which is caused by 3d electron(polaron) hopping from VVI(or VIII) to VV. Interestingly, a drastic increase of σ from 10−5 to 100 S cm−1 was observed when 20BaO·70V2O5·10Fe2O3 glass was isothermally annealed at around crystallization peak temperature(Tc) of 5...
Article
In this review, we introduce a relationship between the local structure and visible light activated photocatalytic effect of two types of iron containing silicate glasses, i.e., 15Na2O·15CaO·xFe2O3·(70-x)SiO2 glass (x = 10-50 in mass %, abbreviated as xNCFS) prepared by melt quenching method and xFe2O3·(100-x)SiO2 giass (x = 10-50 in mass %, abbrev...
Article
In this chapter, relationships between local structure and organic compounds decomposing ability of Fe0 + γ-Fe2O3 mixture were introduced by applying gas chromatography (GC), ultraviolet-visible light absorption spectroscopy (UV-VIS), electrospray-ionized mass spectroscopy (ESI-MS), X-ray diffractometry (XRD) and 57Fe-Mössbauer spectroscopy. Decrea...
Chapter
Mössbauer spectroscopy is quite effective for the research and development of advanced materials that can contribute for the solution of resource, energy, and environmental issues.Most oxide glass has a three-dimensional network structure composed of network former (NWF), such as SiO2, B2O3, P2O5 and network modifier (NWM) such as Na2O, K2O, CaO, a...
Chapter
This chapter described on the recycling process of iron-containing “waste” of silicate glasses that are very effective for the purification of polluted water. The studies proved that iron-containing “waste” of silicate glasses had an interesting electromagnetic phenomenon. The chapter focuses on recycling of combustion ash, discarded from a municip...
Article
Full-text available
Glass sample with a composition of Li1.3Nb0.3Fe1.7(PO4)3, prepared by a conventional melt-quenching method, was heat treated to obtain glass ceramics of NASICON type. Glass transition (T g) and crystallization (T c) temperatures of as-quenched glass sample were determined by differential thermal analysis (DTA). X-ray diffraction (XRD) patterns also...
Article
Charge-discharge capacity and cyclicity of lithium ion battery (LIB) was evaluated in which 15Li2O·10Fe2O3·xSnO2·5P2O5·(70–x)V2O5 glass (x = 0 and 20 in mol%, abbreviated as xLFSPV) was used as a cathode. A local structure of xLFSPV glass before and after charging was investigated by 57Fe- and 119Sn-Mössbauer spectroscopies. 57Fe-Mössbauer spectrum...
Article
Full-text available
We have determined the magnetic structure of the intermetallic compound GdGa by 155Gd Mössbauer spectroscopy and neutron powder diffraction. This compound crystallizes in the orthorhombic (Cmcm) CrB-type structure. It orders ferromagnetically at Tc = 190(2) K and then undergoes a spin reorientation at TSR = 68(2) K. Between Tc and TSR , the magneti...
Article
A relationship between local structure, thermal endurance, chemical durability and electrical conductivity of alkaline iron tungsten vanadate glass, 20R2O•10Fe2O3•xWO3•(70 − x)V2O5, R = Na and K, x = 0-50 mol.%, abbreviated as RFWV was investigated by 57Fe-Mössbauer spectroscopy, X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (...
Article
A relationship between physical properties and local structure of 20Li2O·10Fe2O3·xWO3·(70–x)V2O5 glass, abbreviated as xLFWV glass (x = 0 − 25 in mol%), was investigated by 57Fe-Mössbauer spectroscopy, Fourier transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), leaching test using 20 vol% HCl and DC two- or four-probe meth...
Article
Decomposition mechanism of methylene blue (MB) caused by a mixture of metallic iron-maghemite (Fe0-γFe2O3) was investigated by means of 57Fe-Mössbauer spectroscopy, X-ray diffractometry (XRD), Ultraviolet-Visible Absorption Spectroscopy (UV-vis) and electrospray-ionization mass spectroscopy (ESI-MS). Ten day-leaching test of 10 μmol L − 1 MB aqueou...
Article
A relationship between waste-water cleaning ability and local structure of iron-containing soda-lime silicate glass, 15Na2O·15CaO·xFe2O3·(70-x)SiO2 (x = 10–50 in mass%), abbreviated as NCFSx glass, was investigated by means of 57Fe-Mössbauer spectroscopy, redox titration with KMnO4 for the determination of chemical oxygen demand (COD) and inductive...
Article
A relationship between methylene blue (MB) decomposition ability under visible light and local structure of xFe2O3·(100-x)SiO2 glass abbreviated as xFS prepared by sol-gel method was investigated by 57Fe-Mössbauer spectroscopy, X-ray diffractometry (XRD) and ultraviolet-visible light absorption spectroscopy (UV-Vis). Mössbauer spectra of xFS glass...
Article
alpha-NaFeO2 is promising as minor-metal free cathode materials for low cost sodium-ion batteries. It has a flat voltage plateau at 3.3 V Vs. Na metal and a stable reversible capacity of 85 mAh g(-1) Fe3+/Fe4+ redox reaction on charge/discharge cycle was confirmed by Fe-57 Mossbauer spectrometer. The thermal stability of NaFeO2 cathodes with/withou...
Article
The effect of the structure of a mixture of industrially produced iron and iron oxide on the decomposition of trichloroethylene (TCE) was investigated by gas chromatography, scanning electron microscopy, Fourier transform infrared spectroscopy, energy dispersive X-ray analysis, X-ray diffractometry, and 57Fe-Mössbauer spectroscopy. The concentratio...
Article
A structure-property relationship of semi-conducting 20BaO.10Fe2O3.xP2O5(70-x)V2O5 (BFPV) glass was investigated by 57Fe-Mössbauer spectroscopy, dc four-probe method, and leaching test using 20% HCl. Isothermal annealing of 10BFPV glass, carried out at 500 °C and for 1000 min, resulted in a marked increase in electrical conductivity from 7.4×10-6 t...
Article
Water cleaning effect was investigated for iron-containing silicate glass. A leaching test for 10 days using 500 mL of simulated waste water and 2.0 g of 0.5x(Na2O.CaO).5Fe2O3.(95-x)SiO2 glass (20 <= x <= 50), abbreviated as xNCFS glass, resulted in a remarkable decrease in chemical oxygen demand (COD) from 290 to 26.7 mgL-1. Mössbauer spectra of x...
Article
In order to enhance the mechanical strength of Hagi Porcelain (Hagiyaki), one of the oldest and famous potteries in Japan, new preparation condition was examined. Tempered Hagi porcelain, denominated as ‘Hagi Porcelain B’, was prepared with the Porcelain clay originating from Daido district, Yamaguchi Prefecture, Japan. Structural change of ‘Hagi P...
Article
Full-text available
Twenty CK chondrites collected in the Antarctica Continent were characterized by inductively-coupled plasma mass spectrometry (ICP-MS), prompt gamma ray anal. (PGA), instrumental neutron activation anal. (INAA), X-ray diffractometry (XRD) and 57Fe-Moessbauer spectroscopy. As a result of elemental anal., it was revealed that 18.2∼26.4 mass% of iron...
Article
New conductive glass with a composition of 20BaO·10Fe2O3·xWO3·(70 − x)V2O5 (x = 10–50) was investigated by means of Mössbauer spectroscopy. A marked decrease in quadrupole splitting (Δ) was observed after the isothermal annealing at 500 °C for 1,000 min, due to the structural relaxation of 3D-network composed of FeO4, VO4, and VO5 units. After the...
Article
抄録 Glass transition temperature(Tg) of 20BaO·10Fe2O3&middotxWO3·(70−x)V2O5 glasses showed a step-by-step increase from 339 to 470°C when x was increased from 0 to 50, together with a concordant increase in crystallization temperature(Tc) from 406 to 531°C. Plot of Tg against quadrupole splitting(Δ) of FeIII in the Mössbauer spectra yielded a straig...
Article
Local structure and electrical conductivity of semiconducting 20BaO·10Fe2O3·x MnO2·(70 − x)V2O5 glass (x = 0 − 30), abbreviated as xBFMV, were investigated by means of 57Fe-Mössbauer spectroscopy, differential thermal analysis (DTA) and DC four-probe method. Mössbauer spectrum of these vanadate glasses consists of a doublet with an identical isomer...
Article
xLi2O·(20-x)Ag2O·20Fe2O3·60P2O5 glasses (x = 0, 5, 10, 15 and 20 mol%) and 5Ag2O·15Li2O·5V2O5·15Fe2O3·60P2O5 glass were prepared by melt-quenching of the reagent mixture at 1000 °C. Glass transition temperature (T g) and crystallization temperature (T c) of these samples were determined by differential thermal analysis (DTA). It proved that T g inc...
Chapter
Twenty CK chondrites collected in the Antarctica Continent were characterized by inductively-coupled plasma mass spectrometry (ICP-MS), prompt gamma ray analysis (PGA), instrumental neutron activation analysis (INAA), X-ray diffractometry (XRD) and 57Fe-Mössbauer spectroscopy. As a result of elemental analysis, it was revealed that 18.2~26.4 mass%...
Article
Full-text available
A relationship between the local structure and electrical conductivity of lithium barium iron vanadate glass with a composition of xLi2O(20-x)BaO10Fe2O370V2O5, abbreviated as xLBFV glass, was investigated by means of 57Fe-Mössbauer spectroscopy, differential thermal analysis (DTA), as well as DC four-probe method. When the Li2O content increased fr...
Article
The Mossbauer spectrum of xK2O.(95-x)TiO2.5Fe2O3 glasses (x = 35-60), consisting of a paramagnetic doublet peak due to tetrahedral Fe3+, suggests that the Fe3+ is substituted for the tetrahedral Ti4+. The isomer shift (delta = 0.20-0.23 mm s-1) and the quadrupole splitting (DELTA = 0.72-0.81 mm s-1) decrease linearly with the increasing K2O content...
Article
Full-text available
A relationship between the local structure and mechanical strength of 'new' Hagi porcelain 'A' and 'B' prepared by sintering two types of iron containing aluminosilicate soils under oxidizing and reducing atmospheres were investigated by means of (57)Fe-Mossbauer spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), as well as...
Article
Full-text available
For alleviating both of the environmental and resource-depletion problems related to heavy metals, the authors examined the heavy-metal adsorption and desorption functionalities of some hydrogels. It was found that the functional hydrogels can capture the heavy metals more efficiently than other adsorbents, and besides, some of them can desorb the...
Article
In the present study, in order to examine the N,N-dimethylaminopropylacrylamide/acrylamide {DMAPAA/AAm} hydrogels&apos; capabilities of repetitive heavy-metal-anion recovery from waste fluid, the authors performed successive Cr(VI) adsorption and the adsorbed-Cr(VI) desorption experiments. It has been proved that the DMAPAA/AAm gels show both of th...
Chapter
A relationship between the water purifying effect and structure of 0.5xNa2O·0.5xCaO·5Fe2O3·(95–x)SiO2 glass (Na2O/CaO = 1; NCFS glass) with ‘x’ of 20 and 50 were investigated by means of 57Fe-Mössbauer spectroscopy, X-ray diffraction (XRD), induced coupled plasma optical emission spectroscopy (ICP-OES), as well as absorption spectroscopy, pH and ox...